During July 12th-27th an initial examination and mapping of the suface and underground workings were carried out at the Great Central mine. A further examination was made of the surface of the mine on August 26th-27th. At the time of this second visit sampling had exposed fresh faces along most of the drives and crosscuts, and workings in McKenzie's and West Shafts not previously accessible were inspected.

The Coorabin coalfield bore and shaft sites are listed. A short description is given of each site.

Historical data concerning the operations and findings at the Coorabin coalfield between 1915 and 1937 has been compiled in this report.

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.

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.

Geophysical test surveys were made at Boolarra with the object of determining whether geophysical methods were suitable for the exploration of the bauxite deposits found in that district. Field operations were carried out during the period 17th April to 15th May and consisted of the following: 1. Open Cut Deposit - Surface survey and examination of available sub-surface data, geophysical survey using the Resistivity method, over a small area adjacent to the open cut, geophysical survey using the geomagnetic and Natural Earth Potential methods, on one transverse; 2. Orgill's Deposit - Surface survey and examination of available sub-surface data; 3. Budgaree Deposit - Surface survey and examination of available sub-surface data.

Report on the facts and cost of maintaining and increasing production at the Mount Bischoff tin mine, Waratah, Tasmania.

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.

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.

The Tasmanian gold mine and treatment plants (of which there were two separate plants at different times) were located in Beaconsfield. Suggestions for the treatment of the Beaconsfield sand dumps are discussed herein.