Victoria University Antarctic Research Expedition Science and Logistics Reports 1980-81: VUWAE 25
CONTENTS
CONTENTS
Figure 1: | Map of McMurdo Sound, showing this season's sea floor sampline sites and position of the seismic survey lines. |
Figure 2: | Interpretation of Line 1 (A) and Line 2 (B). |
Figure 3: | Virtual Geomagnetic Pole positions from a sequence of about 6 volcanic flows at Observation Hill, Ross Is. |
Figure 4: | Strike and dip of red bed samples from Knobhead (KH), Table Mt. (TMt), Mt. Kempe (MK), Alligator Peak (AP) and Mt. Crean (MC). |
Figure 5: | Comparison of seismographs and microphone recordings for five events. |
Figure 6: | Frequency of occurrence of Erebus earthquakes of all types versus seismic energy. |
Figure 7: | Spectra of magnetic micropulsations recorded on the Crater and Camp loops between 0700 and 0800 hours NZST on 5 January 1981. |
Figure 8: | Schematic diagrams of the author's equipment on Erebus. |
Table 1: | Eruptions of Erebus between 20 December 1980 and 9 January 1981. |
Plate I: | Satellite image map of the McMurdo Sound Region showing locations covered by VUWAE 25 Events. |
Plate II: | A. The sphincter corer being lowered by winch through the 2m thick sea ice. The winch is mounted and operated on a Tamworth sledge. Twelve inch diameter ice augers and powerhead used to drill the sea ice access holes in the foreground. |
B. Assembled corer ready to lower. The sphincter sleeve in the coring head is being checked. | |
C. The undisturbed top of a core retained in the sphincter corer. The core comprises: muddy sand, silica sponge spicules up to 100mm long and calcareous bryozoan. | |
D. Sediment and sponge spicules retained in an orange-peel grab. | |
PLATE III: | A. Sampling a red bed sequence of the Terra Cotta Siltstone at Mt. Handsley. The red beds have been extensively burrowed. |
B. Two cold paleomagicians sampling a snow-covered section at Table Mountain. Drill holes arrowed. | |
PLATE IV: | A. Four mutually intrusive granitoid rocks from Miers Valley area. Relative ages are determined by cross cutting relationships, (a = oldest, to d = youngest). |
B. A garnet-rich contact aureol. This example formed by a minor vein of the granite intrusion. | |
PLATE V: | Ice Quarry. |
PLATE VI: | A. Recording Equipment in the Erebus Hut. The large boxes are slow speed tape recorders. |
B. The telemetry antenna at Erebus Summit. Hut Point Peninsula in the background. | |
C. (below) Erebus telemetry recording equipment in the Science Laboratory at Scott Base. Mr. Takanami (left) points to the data recorder. Mr. Estes (right) points to the telemetry discriminators below. |