The Pamphlet Collection of Sir Robert Stout: Volume 75

Bearing of these Results on the Origin of Auriferous Lodes

Bearing of these Results on the Origin of Auriferous Lodes.

When I began this work, seven years ago, I was strongly inclined to believe that the lateral-secretion theory afforded the most reasonable explanation of the origin of auriferous deposits in these colonies; but, as the result of each series of examinations appeared, I was forced to the following conclusions:

If any reliance can be placed on the examinations detailed in the foregoing chapters, they seem to indicate that the gold of many lodes of the chief mining districts of New Zealand, Victoria and Queensland is due not to lateral segregation from the adjacent country-rock, but to solutions ascending from some rock deeper than any now exposed at the surface in any part of these colonies.

I am not concerned with the question whether this source is the vague "barysphere," with its somewhat apocryphal contents of heavy metals. I have simply to note that a series of laborious and careful examinations has failed to find it in the rocks of the "lithosphere."

What may be the value of these investigations in the study of the general question of the origin of ore-deposits I leave the reader to judge, being myself content to quote the opinion of Prof. Stelzner, of Freiberg, no mean investigator of that larger question, that

"Each increase of our positive knowledge of the nature and mode of origin of ore deposits, each explanation of any question connected with such deposits or with their associated country-rocks, is a distinct gain, not only to science, but also to mining practice."^*

page 59

Table I.—*Analyses of Country-Rock from Deep Levels. New Chum Railway G. M. Co., Bendigo, Victoria*.
Sample.	Distance from Shaft.	Distance from Reef.	Weight Examined.	Weight of Concentrates Obtained.	Weight of Concentrates of Specific Gravity above 3.18.	Percentage of Sulphur.	Percentage of Carbon.	Weight of Gold Obtained.	Yield of Gold per Ton of Country-Rock.
	Feet.	Feet.	Lbs.	Grains.	Grains.			Grains.	Grains.
a. Fine-grained sandstone. No sulphides visible with a hand-lens. Concentrates contained a very small quantity of sulphides.	At shaft.	277	4.48	240	76	0.06		Nil.	Nil.
b. Fine-grained sandy slate. Pyrite in minute cubes, very sparingly distributed throughout the sample. Concentrates contained a small quantity of sulfides.	16	261	4.48	364	42	0.04	0.68	Nil.	Nil.
c. Sandstone somewhat coarsegrained. No sulphides visible. Concentrates contained only a trace of sulphides.	37	240	4.48	180	61	0.09		Nil.	Nil.
d. Fine-grained, comparatively soft, dark-blue slate, from the vicinity of a small slide, showing pyrite and blende sparingly with a hand-lens. Concentrates showed pure pyrite and blende.	59	218	4.48	424	265	0.57	1.46	.0017	0.85
e. Very hard, fine-grained sandstone. Pyrite in large cubes visible in the sample. Concentrates contained a good percentage of pyrite.	84	193	4.48	356	112	0.24		Nil.	Nil.
f. Very hard, fine-grained light blue slate; very distinct cleavage; no trace of sulphides. Concentrates contained a trace of sulphides.	103	174	4.48	180	27	Trace.	0.06	Nil.	Nil.
g. Rather coarse grained sandstone, with cubes of pyrite, in one case 15 mm. in diameter. Concentrates nearly all pyrite.	127	150	4.48	456	312	0.63		Nil.	Nil.
h. Soft-grained dark blue slate, with a small quantity of pyrite and blende visible with a hand-lens. Concentrates showed a good quantity of pyrite and blende.	145	132	4.48	630	418	0.86	1.32	Gold button lost.
h′. Same as above.	145	132	2.24	250	197	0.86	1.32	.0004	0.4
i. Very hard, fine-grained sandstone. No sulphides visible. Concentrates contained no sulphides.	167	110	4.48	164	26	Trace.		Nil.	Nil.
j. Same as i.	179	98	4.48	212	38	Trace.		Nil.	Nil.
k. Same as i.	191	86	4.48	185	38	Trace.		Nil.	Nil.
l. Fine-grained slate from both sides of a "slide," or slight fault, showing pyrite in small quantity. The sample included a little "pug" from the slide. Concentrates nearly all pyrite.	192	85	4.48	378	216	0.54	Nil.	.0016	0.8
m. Fine-grained slate from both sides of a "slide," or slight fault, showing pyrite in small quantity. The sample included a little "pug" from the slide. Concentrates contained a good percentage of pyrite and blende, with a little galena. In the case of samples marked * the whole of the sample left after concentration was assayed after the concentrates had been examined.	192	85	4.48	643	498	1.03	Nil.	.0023	1.15page 60
n. Fine-grained sandstone with pyrite in large crystals and a little blende.	214	63	4.48	387	266	0.58		.0027	1.35
o. Dark-blue carbonaceous slate with pyrite, arsenopy rite and blende in fair quantity. Concentrates mostly pyrite and blende.	230	47	4.48	678	429	0.90	0.56	.0017	.85
p. Same as o.	250	27	4.48	547	392	1.02	0.68	.0034	1.7
q. Same as o.	265	12	4.48	1140	674	1.66	0.89	.0043	2.15
r*. Fine-grained sandstone. No sulphides visible. Concentrates contained only a trace of sulphides.	271	6	4.48	146	32	Traces		Nil.	Nil.
s. Hard, dark-blue carbonaceous slate, showing pyrite freely, with a little blende. Concentrates obtained nearly clean sulphides.	274	3	4.48	1246	827	1.98	2.64	.0065	3.25
t. Dark-colored casing-slate of the lode (almost black in color from carbonaceous matter), showing a large quantity of pyrite, with a little blende and galena. Concentrates nearly clean sulphides.	276	1	4.48	1627	1016	2.10	4.50	.0132	6.6
u. Same as t.	276	1	4.48	1518	1142	1.87	6.34	.0089	4.45
V w x Laminated quartz (laminæ due to carbonaceous matter from the walls), showing pyrite, blende and galena. Not concentrated. In the case of samples marked * the whole of the sample left after concentration was assayed after the concentrates had been examined.	277	From the Reef	3.50			3.43	2.16	oz. dwt. gt. 2 16 5 1 0 11 1 15 13

page 61

Table II.—*Analyses of Country-Rock from a Cross-Cut at the 1180-Foot Level, South St. Mungo G. M. Co Bendigo, Victoria*.
Sample.	Distance from Shaft.	Distance from Reef.	Weight Examined.	Weight of Concentrates Obtained.	Weight of Concentrates of Specific Gravity above 3.18.	Percentage of Sulphur.	Percentage of Carbon.	Weight of Gold Obtained.	Yield of Gold per Ton of Country-Rock.
	Feet.	Feet.	Lbs.	Grains.	Grains.			Grains.	Grains.
a. Hard, light-blue sandstone, no sulphides. Contained a quartz vein ¼-inch wide. Concentrates contained only a trace of sulphides.	From the Shaft.	128	4.48	316	36	0.015		Nil.	Nil.
b. Hard, gray sandstone, showing large cubes of pyrite. Concentrates contained a good percentage of pyrite.	11	117	4.48	468	213	0.52		Nil.	Nil.
c. Same as above.	20	108	4.48	314	139	0.31		Nil.	Nil.
d. Fine-grained gray slate, showing no sulphides. Concentrates contained very little pyrite.	34	94	4.48	275	Nil.	Trace.		Lost.	Lost.
e. Fine-grained dark-colored slate, showing small crystals of pyrite. A quartz vein ½-inch wide ran through the slate. Concentrates contained a good percentage of pyrite.	53	75	4.48	672	246	0.73	0.08	Nil.	Nil.
f. Moderately coarse-grained hard sandstone. No trace of sulphides. Concentrates contained very little pyrite.	67	61	4.48	416	28	0.02	Nil.	Nil.	Nil.
g. Quartz leader 2 inches wide in sandstone; clear white quartz, showing no sulphides. All assayed.	78	50	1000 grs.			0.06	Nil.	Nil.	Nil.
h. Fine-grained slaty sandstone, with large crystals of pyrite, in some cases 10 mm. in diameter. Concentrates contained a good proportion of pyrite, blende and galena.	93	35	4.48	746	394	0.95	Trace.	.0017	0.85
i. Dark-colored fine grained carbonaceous slate, showing a very little pyrite.	112	16	4.48	264	98	0.19	1.06	Lost.	Lost.
j. Same as above. Concentrates consisted mostly of sulphides.	124	4	4.48	786	493	1.06	1.38	.0073	3.65
k. Carbonaceous slate-casing on foot-wall of reef, with a vein of pyrite about 6 mm. thick running through part of the sample. Concentrates consisted mostly of sulphides.	128	Foot-wall of reef.	4.48	548	391	0.75	4.94	.0124	6.2
l. Clean, white, vitreous quartz, with no trace of sulphides. All assayed.	137	In reef 30 feet wide.	1000 grs.			Nil.	Nil.	.0012	18.3
m. Clean, white, vitreous quartz, with small proportion of pyrite and a few crystals of blende and galena. All assayed.	138	In reef 30 feet wide.	1000 grs.			.016	Nil.	.0113	6.7
n. Hard gray slate. No visible sulphides. In the case of samples marked * the whole of the sample left after concentration was assayed after the concentrates had been examined.	149	Hanging-wall of reef.	4.48	216	84	0.19	Trace	Nil.	Nil.

page 62

Table III.—*Analyses of Country-Rock from Cross-Cut 302 Feet East at the 610-Foot Level, South St Mungo G. M. Co., Bendigo, Victoria*.
Sample.	Distance from Shaft.	Distance from Reef.	Weight Examined.	Weight of Concentrates Obtained.	Weight of Concentrates of Specific Gravity above 3.18.	Percentage of Sulphur.	Weight of Gold Obtained.	Yield of Gold per Ton of Country-Rock.
	Feet.	Feet.	Lbs.	Grains.	Grains.		Grains.	Grains.
a. Hard, fine-grained sandstone. No visible sulphides. Concentrates contained very little pyrite.	From Shaft.	42	4.48	212	48	Trace.	Nil.	Nil.
b. Same as a.	48	90	4.48	316	66	Trace.	Nil.	Nil.
c. White leader of quartz, 3 inches wide, in hard sandstone country, showing no sulphides All assayed.	75	117	1000 grs.			Trace.	Nil.	Nil.
d. Hard, fine-grained sandstone, with large crystals of pyrite, 8 mm. in diameter. Concentrates contained good percentage of sulphides.	119	161	4.48	716	342	0.47	.0003	0.15
e. Hard, dark gray slate. No visible sulphides. Concentrates contained very little pyrite.	176	218	4.48	205	116	0.18	Nil.	Nil.
f Hard sandstone with small, clear, white vein of quartz about ¼-inch wide. No sulphides visible. Concentrates contained very little pyrite.	246	288	4.48	182	46	Trace.	Nil.	Nil.
(g. Same as f. In the case of samples marked * the whole of the sample left after concentration was assayed after concentrates had been examined.	302	344	4.48	210	94	0.24	Nil.	Nil.

page 63

Table IV.—*Examination of Samples from the Prince Regent G. M. Co., Ballarat East*.
Sample	Distance from Indicator.	Weight Examined.	Weight of Concentrates.	Weight of Concentrates of Specific Gravity over 3.18	Yield of Gold.	Yield of Gold per Ton.
	Feet.		Grains.	Grains.	Grains.	Grains.
a. Hard, solid slate, showing no sulphides.	20 East.	4.48	165 No sulphides.	28	Nil.	Nil.
b. Slate, showing no sulphides.	14 East.	4.48	217	35	Nil.	Nil.
c Sandstone, showing a little pyrite.	10 East.	4.48	194	83	Nil.	Nil.
d. Solid, fine-grained slate near a quartz-vein crossing the Indicator; showed a very little sulphide.	4 West.	4.48	370 With a little pyrite.	216	.007	0.35
e Solid slate, showing no pyrite.	16 West.	4.48	116 No sulphides.	24	Nil.	Nil.
f. Solid sandstone from a stratum 6 inches wide; showed no pyrite.	25 West.	4.48	136 No sulphides.	49	Nil.	Nil.
	Distance from Mundic Slate.
g. Solid slate from the middle of a 6-foot stratum of slate.	16 West.	4.48	212 No sulphides.	53	Nil.	Nil.
h. Solid sandstone showing a little pyrite in large cubes.	33 West.	4.48	327 With a good percentage of pyrite.	205	Nil.	Nil.
i. Hard, solid slate from band 9 inches wide between two sandstone beds.	68 West.	4.48	173 No sulphides.	32	Nil.	Nil.
j. Solid sandstone, showing a little pyrite in large cubes.	120 West.	4.48	417 With a good percentage of pyrite.	236	Nil.

page 64

*B. Pun, Etc., From Fault-Lines*.
Sample.	Depth Below Surface.	Weight Examined.	Weight of Concentrates.	Weight of Concentrates of Specific Gravity over 3.18	Yield of Gold.	Yield of Gold per Ton.
	Feet.	Lbs.	Grains.	Grains.	Grains.	Grs.
1. From a slide or "back" 23 feet W. of the Indicator: "pug" or clay, colored dark by a large quantity of carbonaceous matter.	630	2.24	673 With a fair percentage of pyrites.	218	0.0158	15.8
2. The same, from the same slide higher up: stiff bluish clay, with large crystals of pyrite and a little galena.	630	1.12	416 Nearly all pyrite.	309	0.013	26
3. Broken slate, "pug" and quartz from a slide or "back," 10 feet E. of the mundic slate, sample showed a little blende and a fair quantity of pyrite.	630	2.24	433 With a good proportion of sulphides.	289	0.0062	6.2
4. Broken country-slate, sandstone and quartz from an extensive fault 90 feet W. of the mundic slate.	630	2.24	248 Showed a little pyrite.	117	Nil.	Nil.
5. "Pug" from a slight fault, against which the quartz-veins terminated, 15 feet W. of the mundic slate. Showed a large quantity of pyrite, with scattered crystals of galena and blende.	630	1.12	490 Nearly clean sulphides.	313	0.0075	15
6. "Pug" and broken slate and sandstone, with quartz-veins, from an extendi fault which threw the Indicator about 40 feet to the W. Sample showed a large proportion of carbonaceous matter, with a little pyrite and galena.	From 770-foot Level.	2.24	676 do. do. do.	448	0.0113	11.3
7. From the same sample, higher up in the drive.	From 770-foot Level.	2.24	379 do. do. do.	216	0.010	10
8. From a slide to the W. of a vein crossing the Indicator. Sample taken 20 feet W. of the Indicator: quartz-vein, with pyrite and much dark carbonaceous matter.	From 770-foot Level.	2.21	256 Nearly all pyrite.	190	0.0009	0.45
9. From a slide 16 feet E. of the Indicator, consisting of blue "pug," showing a little pyrite and blende.	From 770-foot Level.	2.24	134 Nearly clean pyrite.	98	0.0176	17.6

page 65

Table V.—*Analyses of Country-Rock from. Deep Levels, Northern Star G. M. Co., Ballarat West*.
Sample.	Distance from Shaft.	Distance from Reef.	Weight Examined.	Weight of Concentrates.	Weight of Concentrates of Specific Gravity over 3.18.	Percentage of Sulphur.	Yield of Gold.	Yield of Gold per Ton of Country-Rock.
	Feet.	Feet.	Pounds.	Grains	Grains.		Grains.	Grains.
a. Hard, fine-grained sandstone with vein of white quartz ½-inch wide. No sulphides visible.	0	100	4.48	253	48	0.002	Nil.	Nil.
b. The same, but with a small quantity of pyrites in large cubes. Concentrates contained a good percentage of pyrite.	37	63	4.48	416	50	0.017	.0002	0.1
c. Fine-grained blue slate, showing a little pyrite. Concentrates contained a little galena.	81	19	4.48	378	89	0.035	.0004	.2
d. Hard, grayish-blue sandstone. No pyrites visible.	92	8	4.48	210	23	Nil.	Nil.	Nil.
e. Carbonaceous slate with small quartz-veins, forming the casing. Concentrates nearly all sulphides.	99	1	4.48	1217	876	1.46	.0071	3.55
f. White, splintery quartz from the "Guiding Star" lode, with laminae of carbonaceous shale, showing a little pyrite and arsenopyrite All analyzed.	100	"Guiding Star" lode.	1000 grs.			2.8		314.
g. Fine-grained black slate from the wall of the "Guiding Star" lode. Showed a very little pyrite and arsenopyrite. Concentrates mostly sulphides.	104	0	4.48	586	347	.37	.0036	7.2
h. Hard sandstone with no sulphides.	131	27	4.48	216	49	Trace.	Nil.	Nil.
i. The same.	174	70	4.48	315	42	Trace.	Nil.	Nil.
j. Slate from beside a small quartz-vein 2 inches wide. Showed a little pyrite. Concentrates contained fair proportion of pyrite.	216	112	4.43	842	194	.37	Nil.	Nil.
k. White quartz from leader 2 inches wide. No sulphides visible. All analyzed.	216	112	1000 grs.			Trace.	Nil.	Nil.
l. Sandstone with large cubes of pyrite from hanging-wall of a vein of quartz about 6 inches wide. Concentrates contained a large percentage of sulphides.	278	174	4.48	624	416	.62	Nil.	Nil.
m. Sandstone, hard, moderately coarse-grained. No sulphides.	336	232	4.48	317	46	.02	Nil.	Nil.
n. Slate, with pyrite and arsenopyrite visible in small quantities, taken from the wall of a slide which was filled with recently-formed limonite. Concentrates showed a good percentage of sulphides. In the case of samples marked * the whole of the sample left after concentration was assayed after the concentrates had been examined.	399	295	4.48	426	240	.41	.0013	0.65page 66
o. Solid, hard sandstone. No pyrite visible. Concentrates not analyzed.	440	336	4.48
p. Slate from below a small flat quartz-vein 2 inches wide. Showed a little sulphide. Concentrates contained a good percentage of pyrite.	499	395	4.48	435	193	0.32	.0027	1.35
q. Quartz from a small flat vein, showing a little pyrite.	499	395	1000 grs.			0.68	.0016	25.
r. Slaty sandstone, showing large crystals of pyrite. Concentrates nearly pure pyrite.	550	446	4.48	1216	800	1.06	Nil.	Nil.
s. Slate, with no sign of pyrite, from near a small quartz-vein, varying from inches to 1 inch in width.	617	513	4.48	316	74	Trace.	Nil.	Nil.
t. Slate very close to a fault or "slide," showing pyrite and blende. Concentrates contained a large percentage of sulphides.	678	574	4.48	743	495	0.79	.0071	3.55
u. Hard, fine-grained sandstone, showing no sulphides. Concentrates as analyzed.	741	637
v. Same as above.	804	700	4.48	216	39	Nil.	Lost.	Lost.
w. Fine-grained slate, showing no trace of sulphides.	859	755	4.48	349	72	Nil.	Nil.	Nil.
x. Hard, fine sandstone. No pyrite. Concentrates not analyzed.	908	813
y. Sandstone from the foot-wall of a lode 1 foot wide, running parallel with the "Guiding Star." Showed pyrite in large crystals. Concentrates contained good proportion of pyrite.	971	867	4.48	614	394	0.73	Nil.	Nil.
z. Slaty sandstone, with crystals of pyrite and a small proportion of arsene-pyrite. Concentrates nearly all sulphides.	1017	903	4.48	1026	859	1.37	.0015	0.75
A. Sandstone, with large crystals of pyrite. Concentrates nearly all pyrite.	1051	947	4.48	694	512	0.78	Nil.	Nil.
B. Slate from the wall of an eruptive dike of felsite porphyry. Large crystah of pyrite were abundant in the sample, and blende and galena sparingly distributed In the case of samples marked * the whole of the sample left after concentration was assayed after the concentrates had been examined.	1066	956	4.48	1846	1327	2.35	.008	0.4page 67
Dike 1. Sample taken from 4 feet in the dike. Contained large quantity of pyrite in large crystals, with inclusions of slate and sandstone. Concentrates nearly all sulphides.	1068	964	4.48	2143	1827	3.69	.0134	6.7
Dike 2. The same, with much less pyrite. Concentrates nearly all sulphides.	1073	969	4.48	946	743	0.96	.0076	3.8
Dike 3. The same. No sulphides visible, and no inclusions of slate and sandstone.	1082	978	4.48	176	34	Trace.	Nil.	Nil.
Dike 4. Dike 1 foot from farther wall, included many fragments of slate and sandstone from the country-rock. Contained pyrite in large quantities, with a little arseno-pyrite and blende.	1095	991	4.48	1875	1642	3.24	.014	0.2
C. Sandstone from the farther wall of dike, containing large crystals of pyrite. Concentrates mostly pyrite.	1097	993	4.48	1163	901	1.73	.006	0.3
D. Sandstone from the vicinity of a "slide" No pyrite visible.	1150	1046	4.48	314	86	0.18	Lost.	Lost.
E. Slate from the wall of a small quartz-vein, 6 inches wide. Showed a fair quantity of pyrite with a little galena. Concentrates nearly all sulphides.	1207	1103	4.48	946	713	1.02	.0075	3.75
F. Sandstone, with large crystals of pyrite. Concentrates mostly pyrite.	1221	1117	4.48	673	442	0.72	.014	7.
G. Slate, with a little pyrite and blende, from the farthest point of the workings.	1242	1138	4.48	476	319	0.54	.0035	1.75

page 68

Table VI.—*Analyses of Country-Rock from Deep Levels, United Albion G. M. Co., Steiglitz, near Ballarat, Victoria*.
Sample.	Distance from Shalt.	Distance from Reef.	Weight Examined.	Weight of Concentrates Obtained.	Wieght of Concenrates of Specific Gravity over 3.18	Percentage of Sulphur.	yield of Gold.	Yield of Gold per Ton of Country Rock.
	Feet.	Feet.	Lbs.	Grains.	Grains.		Grains.	Grains
a. Slate, no visible sulphides.	0	69	4.48	276	48	Nil.	Nil.	Nil.
b. White, barren-looking quartz from a large "blow" of quartz from 8 to 16 feet through, showing no sulphides. All assayed.	29	40	1000 grs.			Nil.	Nil.	Nil.
c. Sandstone, showing a small percentage of sulphides. Concentrates contained good proportion of sulphides.	51	18	4.48	647	321	0.73	.0053	2.65
d. Dark-colored slate from the foot-wall of an auriferous lode, showing a good deal of pyrite and arsenopyrite. Concentrates nearly pure sulphides.	68	1	4.48	1035	914	1.037	.0119	5.95
e. Slate from the hanging-wall of the same lode. Concentrates nearly all sulphides.	76	1	4.48	719	641	.846	Lost.	Lost
f. Fine-grained sandstone, with large crystals of pyrite. Concentrates nearly all sulphides.	93	17	4.48	346	285	.436	.0018	0.9
g. Dark-colored slate with a little pyrite. Concentrates contained good percentage of sulphides.	120	44	4.48	517	312	.56	.0023	1.15
h. Hard, fine-grained, gray slate, with small white quartz-veins. No sulphides visible.	140	64	4.48	193	35	Nil.	Nil.	Nil
i. Hard, fine-grained sandstone. No pyrite visible. Concentrates contained no visible sulphides.	169	93	4.48	276	43	Nil.	Nil.	Nil
j. Hard slate. No sulphides visible in sample or concentrates.	203	127	4.48	318	58	Nil.	Nil.	Nil
k. Dark slate from the anticlinal axis. Showed several small veins of quarts with a little pyrite. Concentrates contained a good percentage of pyrite.	220	144	4.48	725	416	.71	.0029	1.45
l. Sandstone, with small quartz-veins. No sulphides visible, and none in concentrates.	268	182	4.48	186	75	Nil.	Nil.	Nil
m. Hard sandstone. No sulphides visible in sample or concentrates. In the case of samples marked * the whole of the sample left after concentration was assayed after the concentrates had been examined.	307	221	4.48	247	36	Nil.	Nil.	Nil

page 69

Table VI A.—*Analyses of Samples from Deep Levels Tam o'Shanter G. M. Co., Steiglitz, near Ballarat, Victoria*.
Sample.	Distance West of Shaft.	Distance from Reef.	Weight Examined	Weight of Concentrates.	Weight of Concentrates of Specific Gravity over 3.18.	Percentage of Sulphur.	Yield of Gold.	Yield of Gold per Ton.
	Feet.	Feet.	Pounds.	Grains.	Grains.		Grains.	Grains.
a. Fine-grained sandstone. No sulphides.	85	100	4.48	375	46	Trace.	Nil.	Nil.
b. Fine-grained slate, showing no sulphides.	160	75	4.48	436	36	Trace.	Nil.	Nil.
c. Fine-grained dark slate, showing small quantity of pyrite. Concentrates contained a good percentage of pyrite.	131	46	4.48	724	546	0.693	Nil.	Nil.
d. Slaty sandstone, showing no sulphides.	95	10	4.48	376	48	Trace.	Nil.	Nil.
e. Casing-slate of a lode filling a fault-fissure which has evidently faulted the country considerably. Sample showed no sulphides.	85	0	4.48	276	38	Trace.	Nil.	Nil.
f. Part of lode consisting of white quartz with small proportion of sulphides. All assayed.	83	0	1000 grs.			0.469	Nil.	75.6
g. Dark, fine-grained slate forming the casing of the lode on the E. side. Pyrite visible in good proportion. Concentrates nearly pure sulphides.	80	0	4.48	943	816	1.23	0.0097	4.85
h. Slate with fine threads of quartz crossing the bedding-planes. A little pyrite and blende in the quartz. Concentrates nearly pure sulphides.	59	21	4.48	612	472	0.76	0.0013	0.65
i. Similar slate, from the synclinal axis. Concentrates contained good percentage of sulphides.	31	49	4.48	573	389	0.48	0.0024	1.2
j. Slate, showing good proportion of sulphides. Concentrates nearly all pyrite.	2	78	4.48	674	513	0.63	0.0053	2.65
	East of Shaft.
k. Sandstone with large crystals of pyrite. Concentrates nearly all pyrite.	6	57	4.48	417	346	0.47	Lost.	Lost.
l. Dark blue sandy slate, showing no sulphides. Concentrates contained a fair quantity of pyrite.	29	34	4.48	357	291	0.46	0.0016	0.8
m. Hard, gray sandstone. Showed no sulphide.	48	15	4.48	213	24	Nil.	Nil.	Nil.
n. Sandstone with a small quantity of pyrite. Concentrates contained a fair proportion of pyrite.	61	2	4.48	817	494	0.87	0.011	5.5
o. Hard, gray sandstone. No trace of sulphides.	80	17	4.48	246	42	Trace.	Nil.	Nil.
p. Slate, with a small proportion of sulphides. Concentrates contained a good percentage of sulphides. In the case of samples marked * the whole of the sample left after concentration was assayed after the concentrates had been examined.	91	28	4.48	378	241	0.35	0.0021	1.05

page 70

Table VII A.—*Long Tunnel G. M. Co., Gippsland, Victoria (Upper Silurian). Analyses of Samples from Dike not Associated with an Auriferous Reef*.
Sample.	Weight Examined.	Weight of Concentrates.	Percentage of Sulphur.	Yield of Gold.	Yield of Gold per Ton.
	Lbs.	Grains.		Grains.	Grains.
a. From the N.W. level 900 feet below the tunnel and about 1600 feet below the surface, from a dike about 3 feet wide, not associated with an auriferous reef. The quartz in the vicinity was quite white in color and non-gold-bearing.	7	1650.	Showing no sulphides.	Nil.	Nil.	Nil.
b. The same, but 10 feet away from the last sample.	7	650.	Showing no sulphides.	Nil.	Nil.	Nil.
c. The same, but contained arsenopyrite in needles sparingly, distributed through the sample, with a little pyrite.	7	860.	Showing a small quantity of sulphides.	0.73	0.0013	0.416
d. 36 feet from last sample from the hanging-wall of a quartz-reef, which contained no sulphides and was not auriferous.	7	647.	Showing no sulphides.	Nil.	Nil.	Nil.
e. Formed the middle of a lode between two veins of clear white quartz; non-auriferous; contained a very little arsenopyrite in needles.	7	1612.	Showing a little pyrite.	0.86	0.0016	0.512

page 71

Table VII B.—*Analyses of Samples from Dike Associated with Rich Auriferous Reef*.
Sample.	Weight Examined.	Weight of Concentrates.	Percentage of Sulphur.	Yield of Gold.	Yield of Gold per Ton.
	Lbs.	Grains.		Grains	Grains.
a. From the 1422-foot level, about 2100 feet below the surface, forming the middle of a richly auriferous lode. Sample heavily impregnated with pyrite, and arsenopvrite in needles. (The quartz associated with it yielded 2 oz. 3 dwts. per ton)	4.48	2107 With a good proportion of sulphides.	1.86	0.049	24.5
b. From the 1322-foot level, about 2000 feet below the surface, forming the foot-wall of a rich lode about 4 feet wide. The dike showed very slight traces of sulphides.	4.48	617 Mostly arsenopyrite.	0.95	0.062	31.
c. From the 1422-foot level, about 2100 feet below surface, forming the hanging-wall of a rich lode, the lode being 18 inches wide, and the dike about 2 feet: 4 inches wide, the dike-rock richly impregnated with pyrite and arsenopyrite.	4.48	1094 With a good proportion of sulphides.	1.36	0.043	21.5

page 72

Table VIII.—*Analyses of Country-Rock of Walhalla, from Cross-Cut at 900-Foot Level (about 1600 Feet Below Surface)*.
Sample.	Distance from Lode Fissure.	Weight Examined.	Weight of Concentrates.	Weight of Concentrates of Specific Gravity above 3.18.	Percentage of Sulphur.	Yield of Gold.	Yield of Gold per Ton of Country-Rock.
	Feet.	Lbs.	Grains.	Grains.		Grains.	Grains.
a. At shaft. Very hard sandstone, showing no sulphides.	278 from dike.	4.48	564 With very small percentage of sulphides.	56	Trace.	Nil.	Nil.
b. Hard, fine-grained slate, showing no sulphides.	231	4.48	326	25	Trace.	Nil.	Nil.
c. Hard sandstone with quartz-veins, from the foot-wall of a small slide or fault. A very little arsenopyrite visible in sample.	178	4.48	637	218	0.373	Nil.	Nil.
d. Broken slate and sandstone from the same slide, with small "stringers" of quartz; showed a little pyrite and arsenopyrite.	178	2.24	416 Nearly all sulphides.	374	0.56	Nil.	Nil.
e. Very hard, dense, slaty sandstone from a bar about 6 inches wide, inter bedded with the country.	125	4.48	274 No sulphides.	39	Nil.	Nil.	Nil.
f. Fine-grained slate, with quartz-seams crossing the bedding-planes, from a disturbed part of the country. A little pyrite and arsenopyrite visible.	97	4.48	624 Mostly sulphides.	490	0.61	0.0008	0.4
g. Sandstone, somewhat coarse-grained, with a few large crystals of pyrite.	74	4.48	447 With a good percentage of pyrite.	276	0.37	Nil.	Nil.
h. Slaty sandstone, fine-grained, with small needles of arsenopyrite visible sparingly in the sample.	32	4.48	394 With a fair percentage of sulphides.	134	0.17	Nil.	Nil.
i. Dark, fine-grained slate, with arsenopyrite in needles, sparingly distributed throughout, and a little pyrite.	14	4.48	439 With a good proportion of sulphides.	202	0.34	Nil.	Nil.
j. Hard sandstone, within 1 foot of dike 5 feet wide. The dike in this case fills the whole fissure, and contains neither quartz nor gold. In the case of samples marked * the whole of the sample left after concentration was assayed after the concentrates had been examined.	1	4.48	364	42	Trace.	Nil.	Nil.

page 73

Table IX.—*Analyses of Samples from the* 1422-*Foot Level, from a Cross-Cut Driven* 165 *Feet Fast to the Boundary of the Long Tunnel Extended Company*.
Sample.	Distance from Dike.	Weight Examined.	Weight of Concentrates.	Weight of Concentrates of Specific Gravity over 3.18	Percentage of Sulphur.	Yield of Gold	Yield of Gold per Ton.
	Feet.	Lbs.		Grains.		Grains.	Grains.
a Slate, with quartz-veins. No sulphides visible.	165	4.48	375 No sulphides.	39	Trace.	Nil.	Nil.
b. Crushed slate from a small slide or fault. Sample contained a little quartz, much oxidized, but showing pyrite sparingly.	139	2.24	987 With a fair quantity of sulphides.	642	1.03	Nil.	Nil.
c. Hard, rather coarse grained sandstone. Showed no pyrite.	102	4.48	247 No sulphides.	32	Trace.	Nil.	Nil.
d. Very dense gray sandstone in a band 4 inches wide between two beds of slate. Showed no sulphides.	75	4.48	312 Very little pyrite.	83	Trace.	Nil.	Nil.
e. Hard, gray slate, with a few small crystals of pyrite.	43	4.48	417 With a good percentage of pyrite.	180	0.22	0.0014	0.7
f. Dark slate from wall of small slide filled with quartz. The sample included a little quartz. No sulphides visible.	25	4.48	232 No sulphides.	37	0.07	Nil.	Nil.
g. Hard, gray sandstone, with crystals of pyrite and arsenopyrite, and arsenopyrite in needles.	13	4.48	643 With a good percentage of sulphides.	519	0.86	0.0062	3.1
h. Slate forming foot-wall; very fine-grained. Showed a little pyrite and arsenopyrite. In the case of samples marked * the whole of the sample left after concentration was assayed after the concentrates had been examined.	1	4.48	408 Mostly sulphides.	315	0.63	0.0081	4.5

page 74

Table X.—*Analyses of Country-Rock from Deep Levels, No. 5, North Phænix G. M. Co., Gympiey Queensland*.
Sample.	Distance from Shaft.	Distance from Reef.	Weight Examined.	Weight of Concentrates Obtained.	Weight of Concentrates of Specific Gravity over 3.18.	Percentage of Sulphur.	Yield of Gold.	Yield of Gold per Ton of Country-Rock.
	Feet.	Feet.	Lbs.	Grnins.	Grnins.		Grains.	Grains.
a. Purple conglomerate. Concentrates contained a small percentage of sulphides.	75	126	4.48	674	193	Trace.	Nil.	Nil.
b. Purple conglomerate, from the wall of a fault hading east at an angle of 43°. Sulphides were easily seen in parts of sample. Concentrates nearly all pyrite.	150	51	4.48	426	317	0.56	0.0027	1.35
c. Black carbonaceous shale forming the casing on the hanging-wall of as auriferous reef 2 feet wide; pyrite in large quantity visible in sample. Concentrates mostly pyrite, containing traces of galena and blende.	200	0	4.48	1273	1096	1.87	0.0146	8.35
d. The same, from foot-wall of reef; sulphides present in less quantity than is the last.	203	0	4.48	647	519	0.94	0.0217	10.85
e. Black carbonaceous shale. No sulphides visible. Concentrates contained only a trace of sulphides.	314	113	4.48	213	79	0.06	Nil.	Nil.
f. The same, showing a little pyrite. Concentrates contained a good percentage of pyrite.	420	194	4.48	476	312	0.43	Nil.	Nil.
g. Same as above.	474	150	4.48	519	426	0.73	Nil.	Nil.
h. The same. No sulphides visible.	562	52	4.48	657	317	0.64	Lost.	Lost
i. The same, showing a large quantity of pyrite, with little blende.	588	26	4.48	1016	842	1.37	0.0273	13.65
j. Dark carbonaceous shale forming the hanging-wall of an auriferous reef. The sample showed a large quantity of pyrite. Concentrates nearly pure pyrite.	613	0	4.48	1273	990	2.17	0.0196	9.8
k. The same. Much less pyrite in sample. Concentrates nearly pure pyrite.	613	0	4.48	513	391	0.74	0.0106	5.3

page 75

Table XI.—*Analyses of Country-Bock from Deep Levels, Brilliant and St. George G. M. Co., Charters Towers, Queensland*.
Sample.	Distance from Shaft.	Distance from Reef.	Weight Examined.	Weight of Concentrates Obtained.	Weight of Concentrates of Specific Gravity over 3.18.	Percentage of Sulphur.	Yield of Gold.	Yield of Gold per Ton of Country-Rock.
	Feet.	Feet.		Grains.	Grains.		Grains.	Grains.
a. Tonalite, with a little black mica. A vein of pyrite containing scattered crystals of blende and galena ran through the sample. Concentrates nearly all clean pyrite.	60	2	4.48	1094	816	1.132	0.0172	8.6
b. The same. Showed no pyrite. Concentrates contained very little pyrite.	60	2	4.48	476	126	0.069	0.0013	0.65
c. The same. No pyrite visible.	38	24	4.48	349	113	Trace.	Nil.	Nil.
d. The same.	38	24	4.48	276	90	Nil.	Nil.	Nil.
e. The same.	15	47	4.48	394	146	Nil.	Nil.	Nil.
f. The same.	15	47	4.48	306	125	Nil.	Nil.	Nil.
g. The same.	0	62	4.48	417	109	Nil.	Nil.	Nil.
h. The same	0	62	4.48	233	87	Nil.	Nil.	Nil.
								Average:
								Oz. Dwt. Grs.
i. Quartz, with large percentage of pyrite, galena and blende. All assayed.	62	From reef.	1000 grs.					2 6 9
j. All assayed.	62	62	From reef.	1000 grs.				2 6 9
k. All assayed. In the case of samples marked * the whole of the sample left after concentration was assayed after the concentrates had been examined.	62	62	From reef.	1000 grs.				2 6 9

page 76

Table XII.—*Analyses of Quartz-Folia from the Mica-Schists of the Tipperary and Premier Mines, Macetown, Otago*.
Sample.	Distance from Gold-Bearing Reef.	Weight Analyzed.	Weight of Cencentrates.	Weight of Concentrates Having Specific Gravity over 3.18.	Sulphur as Insoluble Sulphides.	Yield of Gold.	Yield per Ton of Rock.
	From Dubling United reef. Tipperary Co.
	Feet.	Lbs.	Grains.	Grains.		Grains.	Grains.
A. From quartz-folia about 4 inches wide, dark-colored, with bands of mica. No sulphides visible with hand-lens.	18	2.24	473	135 Cont'd very little pyrite.	0.096	0.0003	0.3
B. From about 3 inches wide Pyrite and arsenopyrite visible sparingly with hand-lens, along foliation-planes.	26	2.24	580	419 Nearly clean pyrite.	0.63	0.0024	2.4
C. From about 6 inches wide. No sulphides visible.	113	2.24	312	110	Trace.	Nil.	Nil
D. From about 4 inches wide. No sulphides visible.	207	2.24	409	212	0.12	Nil.	Nil
E. From about 3 inches wide. No sulphides visible.	426	2.24	248	97	Trace.	Nil.	Nil
	From Killarney reef, Tipperary Co.
F. From about 4 inches wide. Pyrite visible in small quantity.	360	2.24	618	377	0.56	0.0004	0.4
G. From about 3 inches wide. Much mica in foliation-planes, but no pyrite visible.	217	2.24	249 Very little pyrite.	103	Trace.	Nil.	Nil.
H From about 4 inches wide. Clean white quartz. No sulphides.	88	2.24	217 No pyrite visible.	92	Nil.	Nil.	Nil.
I. From about 3 inches wide. Showed pyrite in veins, with mica.	48	2.24	283 About half pyrite.	178	0.37	0.0013	1.3
K. From 2 inch wide. Dark bands running parallel to foliation-planes, and showing good proportion of pyrite and arsenopyrite.	5	2.24	410 Mostly pyrite.	290	0.75	0.0032	3.2
L. From about 6 inches wide. White quartz. No sulphides visible.	48	2.24	317 No sulphides visible.	89	Nil.	Lost.	Lost.
M. From about 3 inches wide, mica in foliation-planes, with pyrite is small quantity.	87	2.24	490 About half pyrite.	276	0.49	0.0013	1.3
	From Premier lode, Premier Co.
N. From about 2 inches wide, showing pyrite in veins.	16	2.24	307 N'ly clean pyrite.	283	0.68	0.0069	6.9
O From about 3 inches wide, showing pyrite in small quantity.	32	2.24	294 N'ly clean pyrite.	187	0.32	Lost.	Lost
P. From about 2 inches wide. Clean white quartz, showing no sulphides. In the case of samples marked * the whole of the sample after concentration was assayed after the concentrates had been examined.	9	2.24	287 Very little pyrite.	43	Nil.	Nil.	Nil.

page 77

Table XIII.—*Analyses of Samples of Country-Rock from the Deep Circulation of the Tipperary G. M. Co., Macetown (Low Level Tunnel)*.
Sample.	Distance from Gold-Bearing Reef.	Weight Analyzed.	Weight of Concentrates.	Weight of Concentrates Having Specific Gravity over 3.18.	Sulphur as Insoluble Sulphides.	Yield of Gold.	Yield of Gold per Ton of Rock.
	From Dublin United Reef.
	Feet.	Lbs.	Grains.	Grains.	Grains.	Grains.	Grains
a. Mica-schist. No sulphides visible.	16	4.48	317 With little pyrite.	109	0.16	0.0003	0.15
b. Same as above.	37	4.48	349 No pyrite.	37	Trace.	Nil.	Nil.
c. The same. Pyrite visible in small quantity in quartz-folia.	62	4.48	427 With a fair quantity of pyrite.	218	0.39	0.0017	0.85
d. The same. No pyrite visible.	90	4.48	248 No sulphides.	20	Nil.	Nil.	Nil.
e. Same as above.	130	4.48	173 No sulphides.	43	Nil.	Nil.	Nil.
f. Same as above.	158	4.48	386 No sulphides.	71	Trace.	Lost.	Lost.
g. The same, from vicinity of slight fault. The sample included a small quantity of fault rock.	198	4.48	318 No sulphides.	59	Nil.	Nil.	Nil.
h. The same. No sulphides visible.	245	4.48	209 No sulphides.	47	Nil.	Nil.	Nil.
i. The same, from a slight fault. Sample much broken and contorted, with quartz veins in all directions, showing a little pyrite.	273	4.48	373 A fair percentage of pyrite.	219	0.36	Nil.	Nil.
j. Solid mica-schist, with a little pyrite and arsenopyrite in foliation-planes and joints.	326	4.48	597 A good proportion of sulphides.	373	0.58	Nil.	Nil.
k. Mica-schist, with a little pyrite, and arsenopyrite in foliation-planes and joints.	405	4.48	630 Pyrite in fair proportion.	296	0.30	Nil.	Nil.
l. The same, showing pyrite and arsenopyrite pretty freely in quartz-folia.	438	4.48	375 Nearly all sulphides.	280	0.41	Nil.	Nil.
	From Killarney Reef.
m. 940 feet from entrance of tunnel. Mica-schist. No sulphides visible.	400	4.48	209 Very little pyrite.	33	Trace.	Lost.	Lost.
n. Mica-schist. No sulphides visible.	317	4.48	173 Very little pyrite.	49	Nil.	Nil.	Nil.
o. Broken and contorted mica-schist from a fault-line, containing small veins of quartz, which showed pyrite and arsenopyrite in fair quantity.	250	4.48	419 A good quantity of sulphides.	317	0.59	0.0007	0.35page 78
	From Killarney Reef.
p. 740 feet from tunnel-entrance. Solid mica-schist. No sulphides visible.	217	4.48	263 No pyrite.	59	Nil.	Nil.	Nil.
q. Solid mica-schist, with small quantity of pyrite, visible especially in quarts folia.	175	4.48	290 With a little pyrite.	111	0.19	0.0013	0.65
r. Solid mica-schist. No sulphides visible.	143	4.48	173 No sulph'ds.	31	Lost.	Lost.	Lost
s. Solid mica-schist Nesulphides visible.	110	4.48	149 No sulph'ds.	38	Nil.	Nil.	Nil.
t. Solid mica-schist, with pyrite in foliation-planes with mica.	74	4.48	304 With good proportion of sulph'ds.	209	0.35	0.0004	0.2
u. Solid mica-schist. No sulphides visible.	39	4.48	237	53	Trace.	Nil.	Nil.
v. Solid mica schist, showing no pyrite.	18	4.48	137 With very sm'll qn'ty of sulph'ds	48	0.09	0.0062	3.1
w. Solid mica-schist, much broken and with numerous veins of quartz and calcite, the quartz showing arsenopyrite and pyrite freely.	Foot-wall of auriferous lode, Killarney Reef.	4.48	643 Good prpt'n of sulph'ds.	237	0.39	0.0029	1.45
x. Solid mica-schist, much broken and with numerous veins of quartz and calcite, the quartz showing arsenopyrite and pyrite freely.	Hanging-wall of auriferous lode, Killamey Reef.	4.48	509 Good prpt'n of sulphd's.	340	0.58	0.0004	0.2
	From Killarney Reef.
y. Solid mica-schist. Very little pyrite.	21	4.48	168 Very little pyrite.	74	0.03	Nil.	Nil
z. Solid mica-schist, showing sulphides rather freely in foliation planes, with mica.	49	4.48	340 With a good percentage of sulphds.	194	0.37	0.0009	0.45
a′ Solid mica-schist. No sulphides visible.	83	4.48	293 No sulph'ds.	47	Nil.	Nil.	Nil.
b′ Solid mica-schist, with small quantity of sulphides in quartz-folia.	176	4.48	178 Small qant'y of sulphd s.	73	0.011	0.0002	0.1
c′ Solid mica-schist. No sulphides visible.	240	4.48	216 No sulphd's.	29	Nil.	Nil.	Nil.
d′ Mica-schist much broken, with veins of quartz running through sample. No sulphides visible.	277	4.48	317 Very small quantity of sulphides.	83	Trace.	0.0005	0.25
e′ Solid mica-schist. No sulphides visible.	300	4.48	149 No sulph'ds.	24	Nil.	Nil.	Nil.
f′ Solid mica-schist.	312	4.48	145 No sulph'ds.	43	Nil.	Lost.	Lost.
g′ Solid mica-schist.	326 From farther end of tunnel, 1530 feet from entrance.	4.48	317 No sulph'ds.	98	Nil.	Nil.	Nil.

page 79

Table XIV.—*Examination of Samples from the Deep Circulation of Macetown Reefs, the Samples Being Taken near the Reef*
Sample.	Distance from Auriferous Lode.	Locality.	Weight Examined.	Weight of Concentrates.	Weight of Concentrates of Specific Gravity 3.18.	Percentage of Sulphur.	Yield of Gold.	Yield of Gold per Ton.
	Feet.		Lbs.	Grains.	Grains.		Grains.	Grains
a. Hanging-wall country, solid mica-schist with a little pyrite and arsenopyrite in veins. Concentrates contained a good percentage of pyrite.	2	Low-level tunnel, Premier Mine, Macetown, Otago.	4.48	716	309	0.65	0.0006	0.3
b. Hanging-wall country of a part of the lode where the lode-fissure was filled with "mullock." Sample was much broken and showed a little pyrite.	1	Low-level tunnel, Premier Mine, Macetown, Otago.	4.48	642	184	0.37	0.0003	0.15
c. Foot-wall country of a part of the lode where the lode-fissure was filled with "mullock." Solid mica schist. No sulphides visible.	1	Low-level tunnel, Premier Mine, Macetown, Otago.	4.48	317	54	Nil.	Nil.	Nil.
d. From a cross cut in hanging-wall country; the country much broken. Sample showed no sulphides. Concentrates contained a little sulphide.	12	Low-level tunnel, Premier Mine, Macetown, Otago.	4.48	512	234	0.38	Nil.	Nil.
e. In the same cross cut, 24 feet further in. Solid mica schist. The specimen contained veins of quartz, with no visible pyrite. Concentrates contained a little pyrite.	36	Low-level tunnel, Premier Mine, Macetown, Otago.	4.48	440	86	0.06	Nil.	Nil.
f. Farther in the same cross-cut. Sample showed a little pyrite in the inter-laminations, associated with mica.	65	Low-level tunnel, Premier Mine, Macetown, Otago.	4.48	763	219	0.39	0.0002	0.1
g. In foot-wall of broken country. The sample contained much quartz, with a little pyrite and arsenopyrite. Concentrates contained a good percentage of sulphides.	12	High-level adit. Premier Mine.	4.48	590	347	0.58	0.0017	0.85
h. Twenty feet farther in, in the same cross-cut. Broken country, showing a little pyrite and arsenopyrite. Concentrates contained a good percentage of sulphides.	32	High-level adit. Premier Mine.	4.48	463	185	0.34	0.0008	0.4
i. Eight feet farther in, in the same cross-cut. Showed a considerable quantity of arsenopyrite and pyrite.	40	High-level adit. Premier Mine.	4.48	576	429	0.86	0.0075	3.75page 80
j. Over 5 feet in Movie's cross-cut. Broken country from hanging-wall side. The reef-fissure at this point contained no quartz. Sample contained a fair quantity of pyrite.	5	High-level adit, Premier Mine.	4.48	609	386	0.67	Nil.	Nil.
k. From the same cross-cut, 14 feet farther in.	19	High-level adit, Premier Mine.	4.48	375	193	0.29	0.0007	0.35
l. From the same cross-cut. Solid country, opposite lode-fissure filled with mullock. Showed no pyrite.	35	High-level adit, Premier Mine.	4.48	246	81	Nil.	Nil.	Nil.
m. From the same cross-cut, 33 feet farther in; quartz-vein 2 inches wide. Showed no sulphides.	68	High-level adit, Premier Mine.	4.48	309	54	Nil.	Nil.	Nil.
n Seven feet from the end of the same cross-cut. Broken country with numerous quartz-veins, showing sulphides freely.	89	High-level adit, Premier Mine.	4.48	376	300	0.52	0.0095	4.75
o. From the end of the same cross-cut.	98	High-level adit, Premier Mine.	4.48	345	272	0.45	0.0111	5.55page 81
p. From cross-cut No. 1. Solid country on foot-wall side; showed no pyrite.	3	Tipperary high level adit.	4.48	211	81	0.047	0.0003	0.15
q. From the same cross-cut, 33 feet farther in. Concentrates showed very little pyrite.	36	Tipperary high level adit.	4.48	186	41	Trace.	Nil.	Nil.
r. From No. 2 cross-cut on the hanging-wall side. Lode-fissure at this part filled with "mullock." Sample from broken country, showed a good deal of pyrite and arsenopyrite.	12	Tipperary high level adit.	4.48	542	360	0.58	0.0019	0.95
s. Sample showed a good deal of quartz, with a little pyrite.	47	Tipperary high level adit.	4.48	396	184	0.36	0.0027	1.35
t. From cross-cut No. 3; hanging-wall, broken country, opposite a part where the reef-fissure lay very flat; showed no sulphides.	1	Tipperary high level adit.	4.48	216	74	0.019	0.0063	3.15
u. From the same cross-cut; country still broken; showed no sulphides.	25	Tipperary high level adit.	4.48	347	85	Trace.	Nil.	Nil.
v. Sample taken from the end of cross-cut No. 3; showed a good proportion of sulphides. Concentrates nearly all sulphides.	46	Tipperary high level adit.	4.48	616	422	0.70	Nil.	Nil.

page 82

Table XV.—*Analyses of Samples from the Deep Levels, Reefton Gold-Field*.
Sample.	Distance from Reef.	Weight Examinged	Weight of Concentrates.	Weight of Concentates of Specific Gravity over 3.18	Percentage of Sulphur.	Yield of Gold.	Yield Gold per Ton.
	Feet.	l.bs.	Grains.	Grains.	Grains.	Grains.	Grains.
a Soft-grained slate, much broken and showing many slickensides. The faces of the slickensides showed streaks of pyrite, due to crushing.	From hanging-wall of auriferous reef in Progress Mine.	4.48	365 With a good percentage of sulphides.	218	0.06	0.013	6.5
b Fine-grained slate, also much broken and contorted, with a number of small quartz-veirs Showed a large quantity of pyrite.	Foot-wall of same reef.	4.48	704 Nearly all sulphides.	593	0.89	Nil.	Nil.
c Fine-grained slate, showing a large quantity of arsenopyrite and pyrite with a little galena.	16 from same reef.	4.48	1248 Large percentage of sulphides.	975	1.83	0.010	5.
d and	60 from same reef.	4.48	910	463	0.71	0.0005	0.25
e Solid slate, little altered, showing no signs of crushing Sulphides in fair quantity.	140 from same reef.	4.48	471 Nearly all sulphides.	309	0.54	Nil.	Nil
f Hard fine-grained slate, showing no sulphides.	195 from same reef.	4.48	243 No sulphides.	65	Trace.	Nil.	Nil
g Hard, fine-grained sandstone showing a large quantity of pyrite.	200 from same reef.	4.48	1110 Nearly all sulphides.	873	1.80	Nil.	Nil
h Fine-grained slate, very much brokes, with seams of quartz. The surface of slickensides was coated with calcite. Nosulphides visible.	Foot-wall of auriferous reef from the "Wealth of Nations."	4.43	176	74	0.16	0.0011	0.55
i Fine-grained slate, contained large quantity of pyrite and arsenopyrite.	From same level, 10 feet farther from the reef.	4.48	904 Nearly all sulphides.	687	1.02	0.017	8.5
j Solid slate, with a vein of quartz about ½-inch wide. Sulphides visible in fair quantity.	From same level, 58 feet farther from the reef.	4.48	703	489	0.73	0.0002	0.1
k Solid, Very hard slate, no sign of breaking. Showed no sulphides.	From same level, 90 feet farther from the reef.	4.48	217 No sulphides.	83	Trace.	Nil.	Nil.
l Solid slate, showing no sign of either quartz or pyrite.	From same level. 135 feet farther from the reef.	4.48	224	83	Nil.	Nil.	Nil.
m. Sohil slate, but showing pyrite and arsenopyrite freely.	From same level, 200 feet farther from the reef	4.48	618	504	1.06	Nil.	Nil.

page 83

Table XVI.—*Analyses of Samples of Soft Decomposed Andesite (Pronylite) from Moanataiari Tunnel*.
Sample.	Approximate Distance from Auriferous Reef.	Weight Examined.	Weight of Concentrates Obtained.	Weight of Concentrates of Specific Gravity over 3.18.	Percentage of Sulphur.	Yield of Gold.	Yield of Gold per Ton of Country-Rock.	Yield of Silver.	Yield of Silver per Ton of Country-Rock.
	Feet.	Lbs.	Grs.	Grains.		Grains.	Grains.	Grains.	Oz. dwt. grs.
A. Grayish propylite, snowing pyrite in good quantity, 20 feet from the Moanataiari fault.	50 From No. 9 Moanataiari Reef.	4.48	1246	716	1.03	0.0007	0.35	8.5	8.17.16
A′ Grayish propylite, showing pyrite in good quantity, 20 feet from the Moanataiari fault.	50 From No. 9 Moanataiari Reef.	2.24	479	208	0.56	0.0006	0.6	3.34	6.19.4
B. Light-brown propylite, showing very little pyrite; from the foot-wall of a small auriferous leader. Concentrates contained very little sulphides.	55 From No. 9. Reef close to a small leader 6 in. wide.	4.48	516	140	0.086	0.0013	0.65	0.0068	Grains. 3.4
C. White propylite, showing large quantity of pyrite; from the hanging-wall of a small auriferous leader. Concentrates contained good percentage of pyrite.	55 From No. 9. Reef close to a small leader 6 in. wide.	4.48	1064	733	1.25	Nil.	Nil.	0.0163	8.15
D. Soft gray propylite, showing very little pyrite. Concentrates showed only a little pyrite.	60 From No. 9; 20 ft. from a leader.	4.48	643	217	0.38	0.0003	0.15	0.0051	2.15
E. Hard bluish-gray propylite, foot-wall of a small auriferous quartz-vein, about 4 inches wide. No pyrite visible.	65 From No. 9; foot-wall of a'rif's ld'r.	4.48	412	103	0.18	Nil.	Nil.	0.0017	0.85
F. Quartz-vein, mentioned under "E," 4 inches wide. All assayed.		1000 grs.					345.0		151.
G. Soft, light-brown propylite, from the vicinity of a "slide," dipping north 30°. The sample showed little pyrite. Concentrates contained good percentage of pyrite.	70 From No. 9; 20 ft. from a'rif's ld'r.	2.24	873	495	0.84	0.0012	1.2	0.019	19.
H. Hard, gray propylite, showing no sulphides; from solid country, midway between two slides. Concentrates contained very little sulphides.	70 From No. 9; 20 ft. from a flat qu'rz-seam, non-auriferous.	4.48	317	90	0.062	Nil.	Nil.	0.0012	0.6
I. White propylite, showing bluish patches, which gave the sample a mottled appearance. Plentifully impregnated with pyrite. Concentrates contained large percentage of pyrite.	20 From Don Pedro Re'f; 8 ft. from a slide dipping W. 70°	4.48	1132	795	1.32	0.0007	0.35	0.0237	4.74
J. Propylite brown from oxidation, which has probably gone on since the tunnel was opened. From the hanging-wall of Don Pedro vein; auriferous quartz, averaging about 10 inches wide. No sulphides visible in the sample.	3 From Don Pedro Re'f.	4.48	375	209	0.44	Nil.	Nil.	0.0008	0.4page 84
K. Quartz from Don Pedro vein, showing a good quantity of pyrite. All assayed.	From the vein.	1000					393		177.
L. Hard, gray propylite, oxidized on outside No sulphides visible.	1 to the foot-wall side.	4.48	717	289	0.74	Nil.	Nil.	Nil.	Nil.
M. Light brown propylite from solid country between Don Pedro vein and the nearest slide. Very little pyrite visible.	20; about 20 feet from the slide.	4.48	316	143	0.19	Nil.	Nil.	Nil.	Nil.
N. Gray propylite with black stringer ½-inch wide, from near the Don Pedro reef. Concentrates obtained showing a good quantity of pyrite.	8	1.12	615	419	0.75	0.0019	3.8	0.0037	7.4
O. White propylite from seam 3 inches wide. The propylite showed a little pyrite. Concentrates contained a good percentage of pyrite.	15	1.12	317	183	0.36	0.0036	7.2	0.0179	35.8
P. Hard, gray propylite from the vicinity of a black seam dipping north. No sulphides visible. Concentrates contained very little sulphides.	34	4.48	254	78	0.21	Nil.	Nil.	Nil.	Nil.
Q. Mixture of white and bluish-white propylite, with a small quartz vein attached. No sulphides visible. Concentrates contained a fair percentage of pyrite.	65 East.	2.24	665	248	0.46	0.007	7.	0.0025	2.5
R. Hard, bluish-white propylite in solid country. Concentrates contained very little sulphides.	100	4.48	216	64	0.37	Nil.	Nil.	Nil.	Nil.
S. "White, soft propylite from near a fault-seam filled with clay, strongly impregnated with sulphides. Concentrates nearly all sulphides.	13 0	4.48	1032	719	1.03	0.0009	4.5	0.0087	4.35
T. Gray propylite from the hanging-wall of a quartz reef 2 inches wide. A little pyrite visible in the sample. Concentrates contained a good proportion of pyrite.	150	2.24	317	194	0.46	Nil.	Nil.	Nil.	Nil.
U. Soft, whitish propylite near small slide. Good percentage of pyrite in sample. Concentrates contained a good deal of pyrite.	110	4.48	604	473	0.83	0.0005	0.25	0.0019	0.95
Z. Moderately hard, gray propylite, brown on outside, due to ferric oxide. Showed small quantity of pyrite. Concentrates contained good proportion at pyrite.	50	2.24	375	190	0.44	0.0013	1.3	0.0062	6.2
A1. Fairly hard, greenish propylite, white in the more decomposed parts Showed pyrite freely. Concentrates contained good proportion of pyrite.	30	4.48	846	615	0.92	0.0009	0.45	0.0081	4.5
B1. Soft, white propylite, showing large quantity of pyrite. Concentrated nearly all pyrite.	6	4.48	770	646	1.02	0.0018	0.9	0.0012	0.60
E1. Soft, white propylite, with dark veins of ferrous sulphate, as well as much pyrite. Concentrates nearly all pyrite.	Beside the reef.	4.48	512	396	0.59	0.0032	1.6	0.0025	1.25

page 85

Table XVII.—*Analyses of Samples of Hard Andesite from Two Belts of Unkindly Country in Moanataiari Tunnel, Thames*.
Sample.	Weight Examined.	Weight of Concentrates.	Weight of Concentrates of Specific Gravity over 3.18	Percentage of Sulphur.	Yield of Gold	Yield of Gold per Ton of County-Rock.	Yield of Silver.	Yield of Silver per Ton of Country-Rock.
	Lbs.	Grains	Grains.		Grains.	Grains.	Grains.	Grains.
a. Very dense dark-blue andesite; showed no sulphides. Concentrates contained no sulphides.	4.48	342	53	Trace.	Nil.	Nil.	Nil.	Nil.
b. Very dense dark-blue andesite, from within 2 feet of a hard white quartz-vein Non-auriferous. Concentrates contained no sulphides.	4.48	209	67	Nil.	Nil.	Nil.	Nil.	Nil.
c. Decomposed band of brownish andesite; from hanging-wall of same quartz-vein. Showed pyrite in very small quantity. Concentrates contained fair proportion of pyrite.	4.48	530	239	0.38	Nil.	Nil.	0.0008	0.04
d. Decomposed band of brownish andesite; showed a little more pyrite. Concentrates contained fair proportion of pyrite.	4.48	575	270	0.41	0.0003	0.15	0.0017	0.85
e. Very hard blue andesite; showed no sign of pyrite. Concentrates contained no sulphides.	4.48	116	29	Nil.	Nil.	Nil.	Nil.	Nil.
f. Andesite, slightly decomposed, varying from blue to brown; showed no sulphides. Concentrates contained no sulphides.	4.48	279	84	Nil.	Nil.	Nil.	Nil.	Nil.
g. Greenish andesite, soft and much decomposed; showed a good deal of pyrite in the most decomposed parts. Concentrates nearly all sulphides.	4.48	438	378	0.68	0.0072	3.56	0.0039	1.95
h. Greenish andesite, soft and much decomposed; showed a good deal of pyrite in the most decomposed parts. Concentrates from the sample met with an accident.	4.48
i. Greenish andesite, soft and much decomposed; showed a good deal of pyrite in the most decomposed parts. Concentrates from the sample met with an accident.	4.48
j. Much decomposed grayish-green andesite, quite white in patches, from near a leader of barren quartz. Sample showed no pyrite. Concentrates contained very little pyrite.	4.48	347	74	0.057	Nil.	Nil.	Nil.	Nil.
k. Much decomposed grayish-green andesite, quite white in patches, from near a leader of barren quartz. Sample showed no pyrite. Concentrates not analyzed.
l. Solid, very hard blue andesite, very little decomposed, and showing no sign of pyrite. Concentrates contained no sulphides.	4.48	189	32	Nil.	Nil.	Nil.	Nil.	Nil.
m. Solid, very hard blue andesite, very little decomposed, and showing no sign of pyrite. Concentrates contained no sulphides.	4.48	237	75	Nil.	Nil.	Nil.	Nil.	Nil.
n. Solid, very hard blue andesite, very little decomposed, and showing no sign of pyrite. Concentrates contained no sulphides. In the case of samples marked * the whole of the sample after concentration was assayed after the concentrates had been examined.	4.48	375	47	Nil.	Nil.	Nil.	Nil.	Nil.page 86
o. Greenish blue, slightly decomposed andesite taken from near a small quartz-vein 1 inch wide, not auriferous. Sample showed a very little pyrite. Concentrates contained a little pyrite.	4.48	304	103	0.19	Nil.	Nil.	0.0004	0.2
p. Greenish blue, slightly decomposed andesite, taken from near a small quartz-vein, 1 inch wide, not auriferous. Sample showed a very little pyrite. Concentrates not analyzed.
q. Mottled blue and gray andesite, fairly hard, 20 feet northeast of the great Moanataiari fault. Sample showed a little pyrite in the more decomposed parts Concentrates contained a fair quantity of pyrite.	4.48	635	270	0.39	0.0005	0.25	0.0117	5.85
r. Hard, blue andesite, very little decomposed. No sign of sulphides. Concentrates contained no sulphides.	4.48	173	27	Nil.	Nil.	Nil.	Nil.	Nil.
s. Mottled gray and blue andesite, little decomposed. Showed very little sulphide. Concentrates contained no sulphides.	4.48	219	80	0.016	Nil.	Nil.	Nil.	Nil.
t. Hard, blue andesite, not at all decomposed. No sulphides. Concentrata contained no sulphides.	4.48	346	73	Trace.		Button lost.
u. Hard, blue andesite, not at all decomposed. No sulphides. Concentrates contained no sulphides. In the case of samples marked * the whole of the sample left after concentration was assayed after the concentrates had been examined.	4.48	204	34	Trace.	Nil.	Nil.	Nil.	Nil.

page 87

Table XVIII.—*Analyses of Various Minerals Isolated from, the Older Crystalline and Newer Eruptive Rocks of New Zealand, Victoria and Queensland*.
Sample.	Locality.	Weight Taken.	Mineral Isolated.	Weight of Mineral Isolated.	Method of Separation.	Sulphides.	Results.
		Gms.		Gms.
1. Gneiss, containing veins of mica, about ½-inch wide, mixed with quartz. Several pounds' weight of mica were easily obtained.	From the "Staircase," on the Sutherland Falls road, Mil-ford Sound, W. Coast of Otago.	200	Mica.	200	Picked by hand.	None.	No gold or silver found.
2. Gneiss, containing veins of mica, about ½ inch wide, mixed with quartz. Several pounds' weight of mica were easily obtained.	From the "Staircase," on the Sutherland Falls road, Mil-ford Sound, W. Coast of Otago.	150	Mica.	150	Picked by hand.	None	No gold or silver found.
3. Granite, with muscovite in large plates, easily picked out of sample.	Clinton Gorge, N.W. of Lake Te Anau, on Milford Sound road.	150	Mica	150	Picked by hand.	None	No gold or silver found.
4. Gneiss; contained veins of muscovite, from which pieces 2 inches square were easily picked out.	Roaring Creek, Arthur River Valley, near Milford Sound.	100	Mica	100	Picked by hand.	None	No gold or silver found.
5. Gneiss; contained veins of muscovite, from which pieces 2 inches square were easily picked out.	On the track between Milford Sound and Lake Ada, W. Coast of Otago.	100	Mica	100	Picked by hand.	None	No gold or silver found.
6. Syenitic gneiss, consisting of quartz, feldspar and hornblende, with a little biotite, the hornblende in a seam about 2 inches wide. Pyrrhotite and chalcopyrite, with minute specks of native copper, associated with the hornblende. Five hundred grammes of the rock gave 53 grammes of sulphides, mostly pyrrhotite, which contained 0 0053 grammes of silver.	Dusky Sound, W. Coast of Otago.		Hornblende.		Picked by hand.	See note below.	See note below.
7. Syenite.	Dusky Sound, W. Coast of Otago.	500	Hornblende	113	Sons't's solution	None.	No gold or silver.
8. Syenitie gneiss. A vein of hornblende about 2 inches wide occupied the greater part of the sample analyzed.	Milford Sound, W. Coast of Otago.	100	Hornblende.	100	Picked by hand.	None.	No gold or silver.
9. Syenite porphyry, showing large patches and crystals of hornblende.	Preservation Inlet, W. Coast of Otago.	100	Hornblende.	100	Picked by hand.	None.	No gold or silver.
10. Syenite porphyry, showing large patches and crystals of hornblende.	West Jacket Arm, W. Coast of Otago.	140	Hornblende.	140	Picked by hand.	None.	No gold or silver.page 88
11. Syenitic gneiss, consisting of quartz, feldspar and biotite, with patches of hornblende. Sample showed pyrrhotite and pyrite. Five hundred grammes grave 18.56 grammes of these minerals chiefly, but no gold or silver was found.	George Sound, W. Coast of Otago.	500				See note below.	See note below.
12. "Granite," a rock containing pink feldspar, quartz, muscovite and bands of hornblende.	George Sound, W. Coast of Otago.	200	Hornblende.	200	Picked by hand.	None.	No gold or silver.
13. "Granite," a rock containing orthoclase, quartz, muscovite and hornblende in veins. One thousand grammes gave 1218 grammes pyrrhotite and arsenopyrite, which yielded no gold or silver.	George Sound, W. Coast of Otago.	1000	Hornblende.		Picked by hand.	See note below.	See note below.
14. Chlorite-schist containing numerous octahedral crystals of magnetite.	Skippers Creek, Central Otago.		Magnetite.	250	Magnet.	None.	No gold or silver.
15. Hornblende-schist, contain at numerous octahedral crystals of magnetite.	Shotover River. Central Otago.		Magnetite.	150	Magnet.	None.	No gold or silver
16. Heavy "black sand." result of erosion of mica-schist. Note 2	Shotover River, Central Otago.		Magnetite.	180	Magnet.	None.	No gold or silver.
17. "Diorite," consisting of triclinic feldspar, hornblende, biotite. magnetic and a little qnartz. One thousand grammes gave 4.934 grammes of pyrite, containing 0037 grain of gold and 0.0041 grain of silver.	Portobello, Otago Peninsula, near Dunedin.					See note below.	See note below,
18. Diorite. like No. 17.	Portobello, Otago Peninsula, near Dunedin.	500		Hornblende, 57 Mica, 43	Sonstadt's Solution.	None.	No gold or silver.
19. Diorite. like No. 17.	Portobello Otago Peninsula, near Dunedin.	500		Biotite, 38 Hornblende, 26	Sonstadt's Solution.	None.	No gold or silver.
20. Phono lite.	Near Dunedin.		Magnetite.	60	Magnet.	None.	No gold or silver.
21. Basalt, very much decomposed, with large, undecomposed crystals of augite and hornblende.	Water of Leith, near Dunedin.		Hornblende, 2.8 to 3 Augite, 3 to 3.2	16 25	Klein's Solution.	None.	No gold or silver
22. Hard, solid basalt, from a quarry.	Near Oamaru, Otago.		Magnetite.	80	Magnet.	None.	No gold or silver
23. Gneiss-granite, with large folia of mica, easily picked out of sample.	Cape Foulwind, W. Coast of Nelson.		Mica.	200	Picked by hand.	None.	No gold or silver
24. Fine-grained granite.	Inangahu a River, Reef-ton.	500	Mica.	84	Klein's Solution.	None.	No gold or silver.
25. Fine grained granite.	Cape Foulwind quarries, W. Coast of Nelson, N. Z.	500	Mica.	43	Sonstadt's Solution.	None.	No gold or silver.page 89
26. Granite, with a pyritous vein. One thousand grammes grave 28.92 grammes of arsenopyrite and pyrrhotite, with a little galena, and this yielded 0.0032 grain of gold and 0.0019 grain of silver.	Rangitoto, Westland, N.Z.	Gms.		Gms.	Klein's Solution.	See note below.	See note below.
27. Granite.	Bed of Hokitika river, West land. N. Z.	500	Mica.	48	Klein's Solution.	None.	No gold or silver
28. Gneiss.	Bligh Sound, W. Coast Otago.	500	Mica.	61	Klein's Solution.	None.	No gold or silver.
29. Nepheline andesite, hard, very little decomposed.	Moanataian tunnel, Thames district.	1000	Pyroxenes of sp. gr. 2.9 to 3.2	73	Klein's Solution.	None.	No gold or silver.
30. Hard blue hornblende-andesite.	Moanataiari tunnel. Thames district.	1000	Hornblende and chlorite between sp. gr. 2.8 and 3.1.	56	Klein's Solution.	None.	No gold or silver.
31. Hornblende-andesite, slightly altered.	Waitekauri creek, Thames district.	1000	Hornblende and chlorite between sp. gr. 2.8 and 3.1.	65	Klein's Solution.	None.	No gold or silver.
32. Augite andesite, with much chlorite.	Moanatairi tunnel, Thames district.	1000	Pyroxen's between sp. gr. 2.9 and 3.2.	43	Klein's Solution	None.	No gold or silver.
33. Hard blue unaltered augite-andesite.	Fame and Fortune, G. M. Co., Thames.	1000	Pyroxen's between sp. gr. 2.9 and 3.2.	84	Klein's Solution.	None.	No gold or silver.
34. Hard blue unaltered augite-andesite.	Fame and Fortune G. M. Co.. Thames.	500	Pyroxen's between sp. gr. 2.9 and 3.2.	27	Klein's Solution.	None.	No gold or silver.
B. Rocks of Victoria.
35 "Diorite" dike, near auriferous reef, Walhalla, Gippsland, Victoria.	900 ft.level Long Tunnel, G. M. Co.	1000	Hornblende.	73	Klein's Solution.	None.	No gold or silver.
36 "Diorite." associated with copper-lode. Showed chalcopyrite, of which there were obtained from 1000 grammes of the rock 16.48 grammes (with a small quantity yielding 0.407 grain of silver and no gold.	Thomson river, ne'r Walhalla. Gippsland. Vict.	1000				See note below.	See note below.
37. "Diorite." like No. 36.	Thomson river, ne'r Walhalla. Gippsland. Vict.	1000	Hornblende.	38	Klein's Solution.	None.	No gold or silver.
38. Syenitic granite (quartz, orthoclase and muscovite. with large crystals of hornblende). One thousand grammes gave 16.03 grammes of pyrite, yielding neither gold nor silver.	Big Hill, Bendigo, near the Silurian boundary.		Hornblende.			See note below.	See note below.
39. Syenitic granite, like No. 38.	Big Hill, Bendigo, near the Silurian boundary.	500	Mica.	53	Klein's Solution.	None.	No gold or silver.
40. Granite.	Big Hill, Bendigo, near the Silurian boundary.	500	Mica.	84	Klein's Solution.	None.	No gold silver.
41. Syenite.	From Gabo Island. S. E. of Vict., used as a building stone in Melbourne.	1000	Hornblende.	96	Klein's Solution.	None.	No gold or silver.
42. Very dense basalt, overlying auriferous slates.	Ballarat East, Victoria.		Magnetite.	50	Magnet.	None.	No gold or silver.
43. Vesicular basalt.	Sunbury, near Melbourne, Victoria.	Magnetite.	40	Magnet.	None.	No gold or silver.page 90
C. Rocks of Queensland.
44.	Quartz-mica diorite (tonalite: the "granite" of Charters Towers).	The 1070-ft. level, Brilliant & St. George G. M. Co.. Charters Towers Queensland.	500	Sp. gr. 2.75 to 3 (biotite). Sp. gr. 3 to 3.2 (hornblende).	21	Klein's Solution.	None.	No gold or silver.
				50
45.	Quartz mica diorite (tonalite: the "granite" of Charters Towers).	The 1070-ft. level, Brilliant and St. George G. M. Co., Chartere Towers, Queensland.	500	Sp. gr. 2.75 to 3, obiotite). Sp. gr. 3 to 3.2 (hornblende).	47	Klein's Solution.	None.	No gold or silver.
				40
46.	Diorite-aphanite, with much carbonate of lime (calc-aphanite); a very much altered rock; effervesces strongly with acid (the "greenstone" of the Gympie gold-field). It contains pyrite and sphalerite in small quantities. One thousand grammes gave 8.42 grammes of pyrite, yielding no gold or silver.	The 950-ft. level of the No. 5 North Phoenix G. M. Co., Gympie.	1000		36		See note below.	See note below.
47.	Diorite-aphanite, with much carbonate of lime (calc-aphanite); a very much altered rock; effervesces strongly with acid (the "greenstone" of the Gympie gold-field). One thousand grammes gave 42.7 grammes of pyrite and galena, which yielded 0.0016 grain of gold and 0.0037 grain of silver.	The 950-ft. level of the No. 5 North Phoenix G. M. Co., Gympie.	1000		25		See note below.	See note below.

page 91

Table XIX.—*Examination of Mine-Waters of the Vadose Region for Free Acid and Ferric Salts*.
Sample.	Country-Rock.	Reaction to Test-Paper.	Free Acid in Grammes per Liter before Exposure to Air.	Free Acid in Grammes per Liter after Exposure to Air.	Total Weight of Iron in Grammes per Liter.	Iron Present as Ferric Salts.	Iron Present as Ferrous Salts.
			HC1.	H₂SO₄.	HC1.	H₂SO₄.
a. From the Whau mine, Thames, N. Z. Contained a large quantity of iron in solution. Color, wine-red. Sp. gr., 1.021.	Prop'lite highly pyritous.	Strongly acid.	0.446	7.901	0.446	8.650	3.198	2.431	0.767
b. From Maria reef, Karangahake, Thames, N. Z. Deposited a large quantity of ferric hydroxide on standing.	Prop'iite highly pyritous.	Strongly acid.	0.287	Nil.	0.592	1.3842	2.471	0.946	1.525
c. From Woodstock reef, Thames, N. Z. Behaved on standing like sample b.	Prop'iite highly pyritous.	Acid.	0.065	Nil.	0.208	Nil.	1.086	0.731	0.355
d From the Alburnia mine, Thames, N. Z. In appearance like sample a. Sp. gr., 1.019	Prop'iite highly pyritous.	Strongly acid.	0.506	6.078	0.506	8.921	2.017	0.896	1.111
e. From the Grace Darling mine, Thames, N. Z. Nearly clear; slight deposit of ferric hydroxide on standing.	Prop'iite highly pyritous.	Acid.	0.079	Nil.	0.361	Nil.	0.968	0.834	0.134
f. From the Martha mine, Waihi, Thames, N. Z. Appearance and behavior on standing like sample e.	Propylite and rhyolite.	Acid.	0.216	Nil.	0.465	0.380	0.758	0.210	0.548
g. From the Crown mine, Karangahake, Thames, N. Z. Like samples e and f.	Propylite, pyritous.	Acid.	0.409	1.063	0.605	1.582	1.903	1.127	0.776
h. From the Tipperary mine, Macetown, Otago. Clear.	Mica-schist.	Neutral.	Nil.	Nil.	Nil.	Nil.	0.095	0.027	0.068
i. From the Premier mine, Macetown, Otago. Clear.	Mica-Schist.	Neutral.	Nil.	Nil.	Nil.	Nil.	0.872	0.305	0.567
j. From the Long Tunnel, Walhalla, Victoria. Clear.	Slate and sandstone.	Highly acid.	Nil.	Nil.	Nil.	Nil.	0.569	0.481	0.088
k. From the Bonanza mine, Nenthorn, Otago. Clear.	Mica schist.	Highly acid.	0.087	Nil.	0.105	Nil.	1.007	0.783	0.224
l. From a quartz-reef near Roxburgh, Otago. Reddish; deposited a good quantity of ferric hydroxide on standing.	Mica schist.	Strongly acid.	0.658	Nil.	0.816	Nil.	1.569	1.406	0.163
m. From the Bella reef, Waipori, Otago. Clear.	Mica schist.	Slightly acid.	0.064	Nil.	Nil.	Nil.	0.987	0.639	0.348
n. From the Gabriel's Gully reef, Lawrence, Otago. Clear.	Mica schist.	Neutral.	Nil.	Nil.	Nil.	Nil.	0.640	0.379	0.261
o. From the Game Hen reef, Hindon, Otago. Clear.	Mica schist.	Acid.	Nil.	Nil.	0.406	Nil.	1.206	0.217	0.989
p. From the reef on Sovereign Hill, Ballarat, Victoria. Clear.	Slate and sandstone.	Neutral.	Nil.	Nil.	Nil.	Nil.	0.489	0.426	0.063
q. From the reef on Big Hill, Bendigo, Victoria. Clear.	Slate and sandstone.	Neutral.	Nil.	Nil.	Nil.	Nil.	0.602	0.578	0.024

page 92

Table XX.—*Analyses of Country-Rock from the Vadose Region of Walhalla Gold-Field, Gippsland, Victoria*.
Sample.	Approximate Distance from Reef (Cohen's Reef).	Weight Examined.	Weight of Concentrates Obtained.	Percentage of Sulphur.	Yield of Gold.	Yield of Gold per Ton of Country-Rock.
	Feet.	Pounds.	Grains.		Grains.	Grains.
a. Very hard, coarse-grained, solid sandstone, much stained with oxide of iron.	3 West.	4.48	1904 Chiefly oxide of iron, showing a little mica.	Trace.	Nil.	Nil.
b. Fine-grained, hard, solid slate, very little altered in any respect.	10 West.	4.48	1650	Trace.	Nil.	Nil.
c. Oxide of iron from a cavity between sandstone and slate. The country much broken near where sample was taken.	16 West.	2.24	1824	Nil.	0.027	27.
d Slate, fine-grained, very little altered, very solid and hard.	100 West.	2.24	All assayed.	Nil.	Nil.	Nil.
e. Broken sandstone, slate and oxide of iron, from a small fault in the rock, exposed to the surface.	240 West.	2.24	1463	Nil.	0.0183	18.3
f. White quartz, slightly iron-stained, from small reef-formation about 4 inch wide.	360 West.	1000 gre.	All assayed.	Nil.	Nil.	Nil.
g. Hard, fairly coarse-grained sandstone, with seams of ferric oxide along the bedding-planes.	540 West.	4.48	1280 Chiefly quartz, ferric oxide, with a little mica.	Nil.	0.0027	1.35
h. Slate, sandstone and ferric oxide from broken country, filling a slight fault.	1200 West.	2.24	1640	Nil.	0.0076	7.6
i. Ferric oxide, coating slate and sandstone.	6 East.	2.24	1356 Mostly ferric oxide, with a little magnetite.	Nil.	0.029	29.
j. Hard, solid, fine grained slate, little altered.	75 East.	2.24	All assayed.	Trace.	0.0017	1.7
k. Hard sandstone, much stained with ferric oxide. In the case of samples marked * the whole of the sample left after concentration was assayed after the concentrates had been examined.	350 East.	2.24	1748 Chiefly ferric oxide.	Nil.	Nil.	Nil.

page 93

Table XXI.—*Analyses of Country-Rock from the Vadose Region of the Ballarat Gold-Field, Victoria*.
Sample.	Approximate Distance from Auriferous Reef.	Weight Examined.	Weight of Concentrates Obtained.	Percentage of Sulphur.	Yield of Gold.	Yield of Gold per Ton of Country-Rock.
		Lbs.	Grains.		Grains.	Grains.
a. Oxide of iron, with a little quartz and loose sand, formed by the disintegration of sandstone.	8 East.	1.12	684 Mostly ferric oxide and quartz.	Nil.	0.037	74
b. Oxide of iron, from a joint separating two adjacent strata of sandstone.	60	2.24	1050	Nil.	0.017	17
c. Soft sandstone, pure white.	140	4.48	1812	Nil.	0.0063	3.15
d. White pipe-clay, with yellow streaks. A product of the decomposition of slate.	186	4.48	1485	Nil.	0.0023	1.15
e. Soft, fine-grained pipe clay, colored from red to purple by oxide of iron.	240	4.48	2116	Nil.	0.0016	.8
f. Oxide of iron, mixed with soft sandstone and clay from broken country.	360	2.24	1642	Nil.	0.0058	2.9
g. Oxide of iron, forming clay parting between two beds of pipe-clay.	500	1.12	856	Nil.	Nil.	Nil.

page 94

Table XXII.—*Analyses of Rocks from the Vadose Region Otago, New Zealand*.
Sample.	Distance from Auriferous Reef.	Approx. Depth Below Surface.	Locality.	Weight Taken.	Weight of Concentrates.	Percentage of Sulphur.	Yield of Gold.	Yield of Gold Ton Country-Rock.
	Feet.	Ft.		Lbs.	Grains.		Grains.	Grs.
a. Mica-schist, yellowish color, soft, very much decomposed.	4	40	From a tunnel driven along the Bella reef, Waipori, Otago.	4.48	643 Mostly mica and oxide of iron.	Nil.	0.0016	[unclear: 0.8]
b. Mica-schist, yellowish color, soft, very much decomposed.	20	40	From a tunnel driven along the Bella reef, Waipori, Otago.	4.48	1246	Nil.	0.0107	5.15
c. Mica-schist, yellowish color, soft, very much decomposed.	3	50	From a tunnel driven along the Bella reef, Waipori, Otago.	4.48	1675	Nil.	0.065	32.55
d. Hard mica-schist, with quartz-bands ½-inch wide. Specimen much stained with oxide of iron.	60	30	Near the mouth of the low-level tunnel, Tipperary G. M. Co., Macetown, Otago.	4.48	1217	Nil.	Nil.	Nil.
e. Ferric oxide from a slight fault in mica-schist, showing a little quartz in [unclear: vein]	35	60	From the same tunnel, but 25 feet nearer the reef.	2.24	1176	Trace.	0.0179	[unclear: 17.5]
f. Quartz and ferric oxide from broken country.	20	70	From the same tunnel, 15 feet nearer the reef.	2.24	1030	Trace.	0.0086	[unclear: 8.6]
g. Solid mica-schist, much stained by ferric oxide.	160	35	From near the mouth of the low-level tunnel, Premier G. M. Co, Macetown, Otago.	1.12	774	Nil.	0.0018	[unclear: 3.5]
h. Ferric oxide and broken mica-schist, from a small fault.	90	85	From the same tunnel, but nearer the reef and at a greater depth.	2.24	617	Trace.	Nil.	Nil.
i. Solid mica-schist, much discolored by ferric oxide.	65	95	From the same tunnel, but 15 feet nearer the reef.	2.24	612	Nil.	0.0013	[unclear: 2.4]
j. Much decomposed, very soft mica-schist, stained brown with ferric oxide.	6	40	From the Bonanza reef, Nenthorn, Otago, within 6 feet of a rich auriferous reef.	2.24	1738 Principally mica and ferric oxide.	0.027	0.0016	[unclear: 11.5]
k. Much decomposed, very soft mica-schist, stained brown with ferric oxide.	3	40	From the same mine, at the same depth, but nearer the reef.	2.24	1247	Nil.	0.0073	[unclear: 7.5]
l. Ferric oxide filling the space in joint-planes of phyllite, which forms [unclear: the] country-rock of this reef.	600	20	From a cliff west of Saddle Hill reef, near Dunedin.	1.12	726	0.008	Nil.	Nil.
m Decomposed phyllite, much stained with ferric oxide.	200	20	From the same locality, but nearer reef.	2.24	1073	Nil.	0.0095	[unclear: 0.5]

page 95

Table XXIII.—*Analyses of Samples from Skipper's Road, near Lake Wakatipu, Otago*.
Sample.	Distance from Auriferous Reef.	Approx. Depth Below Surface.	Locality.	Weight Taken.	Weight of Concentrates.	Percentage of Sulphur.	Yield of Gold.	Yield of Gold per Ton of Country-Rock.
	Feet.	Feet.		Lbs.	Grains.		Grs.	Grs.
a. Ferric oxide from joint-planes.	At least 2 or 3 miles.	50	All these samples were taken from a deep cutting on the Skippers' road.	2.24	1127 Chiefly ferric oxide and mica.	Nil.	Nil.	Nil.
b. Broken rock; quartz and mica, with much contorted mica-schist, filling a fissure 18 inches wide.	About ¼-mile from a.	80		2.24	1416 With a little pyrite.	Nil.	Nil.	Nil.
c. Broken rock; quartz and mica.	At least 1 mile.	30		2.24	1723	Nil.	Nil.	Nil.
d. Broken rock, but the sample contained a few large crystals of pyrite, somewhat decomposed to ferric oxide.	About 1000 yards from c.			2.24	1096 With a good per-cent'g of sulph'd's	1.384	Nil.	Nil.
e. Brokeu rock, but showed no pyrite.	From near sample d.	40		2.24	834 Snowed no p'rite.	Nil.	Nil.	Nil.
f. Quartz and broken mica-schist and ferric oxide, from a fault-fissure or lode-formation, about 1 foot wide, in mica-schist.	About 3 mi's.	20		2.24	1568	Nil.	Nil.	Nil.
g. Quartz and broken mica schist.	From near sample f.	40		2.24	817	Trace.	Nil.	Nil.
h. Ferric oxide, filling joint-planes in broken mica-schist.	Over 2 miles.	10		1.12	716	Nil.	Nil.	Nil.
i. Quartz-inter animations, about 2 inches wide, in mica-schist, much stained with ferric oxide. In the case of samples marked * the whole of the sample left after concentration was assayed after the concentrates had been examined.	Near samp. h.	15		1.12	618	Nil.	Nil.	Nil.

page 96

Table XXIV.—*Analyses of Samples from the Vadose Region of the Ohinemuri District, Thames, New Zealand*.
Sample	Depth Below Surface.	Approx. Distance from Reef.	Locality.	Weight Examined.	Weight of Concentrates.	Yield of Gold.	Yield of Gold per Ton.	Yield of Silver.	Yield of Silver per Ton.
	Feet.	Feet.		Lbs.	Grains.	Grains.	Grs.	Grains.	Grs.
a. Nearly white propylite; showed a good percentage of pyrite.	10	30	From a cliff on the tramway between the Crown mine and Karangahake, Thames.	4.48	1634	0.0014	0.7	0.0018	[unclear: 0.5]
b. Ferric oxide and higher oxides of manganese, with a little quartz.	20	180	From a fault.	1.12	All assaved.	0.009	18	0.0036	7.2
c. Solid, hard andesite, oxidized to brown color on outside Showed a good deal of pyrite.	20	350	From a fault.	4.48	1065 With a good percent'ge of pyrite.	0.0062	3.18	0.0054	2.7
d. Hard, greenish hypersthene-andesite. Showed a good deal of pyrite.	30	120	East of the Maria reef, Karangahake, Thames.	4.48	873 With a good proportion of pyrite.	Nil.	Nil.	Nil.	Nil.
e. Ferric oxide and higher oxides of manganese, from a vein near the foot-wall of the [unclear: Gre] Woodstock reef.	80	3	Great Woodstock Tunnel, Karangahake, Thms.	1.12	All assayed.	0.0095	19	0.0034	6.8
f. Andesite; brown, much decomposed. No pyrite visible.	10	60	From a cliff on the Waitawheta river, near the Crown mine, Thames.	2.24	All assayed.	0.0013	1.3	0.0042	4.2
g. Decomposed andesite and ferric oxide from a fault.	60	24	Near the Grace Darling reef, Waitekauri, Thames.	4.48	1372	0.0063	3.15	0.0048	2.4
h. Grayish white andesite, much oxidized on the outside, but showing pyrite freely what broken.	60	; 30	Foot-wall side of Crown reef.	4.48	846 With a large percentage of sulphides.	Nil.	Nil.	Nil.	Nil.
i. Nearly white, very siliceous rhyolite. Showing pyrite freely.	25	600	200 yds. off hanging-wall side of the Crown reef, 10 ft. above the Waitawheta river.	2.24	617 Nearly all pyrite.	0.0093	9.3	0.0126	[unclear: 12.6]
j. Ferric oxide and higher oxides of manganese.	10	660	From a fault exposed on the tramway between the Crown mine and Karansahake, Thames.	1.12	All assayed.	0.0071	14.2	0.0014	[unclear: 2.8]