FAULTS

Very few large faults have been mapped in the region, and none were accessible. Several small faults were examined and found to be barren. The locality of a large, inferred fault, between the Radian Glacier and Roaring Valley, Walcott Bay area, was examined but the prosence of a fault was not definitely established and no mineralisation was observed. Soil samples were collected from scree in the vicinity and will be analysed for copper and zinc. Two small sulphide nodules containing pyrite, chalcopyrite and pyrrhotite were found at the contact of a dolerite lyke and Precambrian marble in this area. Furthermore the dolerite appeared macroscopically similar to Ferrar Dolerite which forms mills within the Deacon sandstone. Three other dykes of similar composition were recorded in the area and these may be part of a swarm of feeder dykes for the sills. This is believed to be the first discovery of sill-[unclear: dylan] within the Precombrian basement rocks; however extensive laboratory work is necessary to prove the relationship.