Preliminary assessment of core recovered from drill holes Nos. 22, 23, and 24, King Island.

A point has been reached in the prospecting of this field where it is necessary to review results and consider future actions. The bore on site A has been completed and Mr. Knight has concluded his preliminary geological survey of the area. The information now available modifies some of our earlier views. The following statement summarises the position.

Legacy product - no abstract available

The Chilcot mine orebody is a steeply dipping, well defined fissure zone of brecciated andesite, with chalcopyrite in shoots, averaging about 8 per cent copper. Other minerals are bornite, pyrite, hematite, magnetite, quartz and calcite. Pre-ore faults displace the lode channel and are associated with the mineralisation. The ore body is developed by two levels 160 feet in length at 104 and 178 feet depth, and ore is being extracted from a stope between the two levels northeast of the shaft. Water level is a little over 100 feet from the surface. The general pitch of the ore body is about 45 degrees to the northeast. Exploration is recommended of the probable northeast extension of the lode down the pitch, and geophysical investigation to attempt to locate further possible shoots of ore.

This report deals with the results of a geophysical test survey which was carried out in the vicinity of the Burra mine between March 4th and 13th, 1942.

The deposit is situated 2 miles west from the Scheelite mine at Grassy. A short description of the geology of the area, workings, and mineral occurrence is given in these notes.

A report on the Montana silver-lead mine, Zeehan, Tasmania.

The Wymah reefs are situated in fairly rugged mountainous country, between 1,500 and 2,000 feet above sea level, about 25 miles easterly from Albury. This report provides an account of the general and economic geology of the reefs. Prospects and recommendations are discussed.

The principal heavy mineral deposits occur along the stretch of beaches from Ballina to Tweed Heads, in northern New South Wales, though lesser, but still commercial, accumulations are known at least as far south as Coff's Harbour, and north to Southport in Queensland. Beaches at Yamba, Wooli, and at Fingal have been worked out by Porter and Derrick, the principal producers. This report gives an overview of mineral occurrence, and the formation, composition, and origin of the deposits.

King Island is situated at the western end of Bass Strait. The scheelite deposits at Grassy were discovered by Mr. T. Farrell about 1913. A new Company - King Island Scheelite N.L. was formed and commenced operations during 1938 and results of their operations to the 31st October, 1941 show: [see record for complete table]. The present production (based on 1941 figures) is 30,000 tons of ore per annum from which 200 tons of scheelite concentrate is obtained. Geology, mining operations, milling practice, and recommendations for testing and development are discussed.