The Mont Murphy reefs occur in sedimentary rocks, which strike northwest and dip southwest at 45 degrees, about 31/44 mile north from an intrusive granite contact. The reefs, which strike north to northeast and dip steeply east, can be divided into three groups - the No. 1 reef, the No. 2 reef, and the Upper Mount Murphy group. Total positive plus probable ore on present mine exposures adds up to 1,132 tons, containing 18 tons tungstic oxide worth £9,900. Possible additional ore is about 2,500 tons with a tungstic oxide content of perhaps 41 tons. There is little prospect of capital invested being returned but the mine may pay operating costs if working expenses are kept to a minimum.

The Great Cobar ore deposit was discovered in 1870. Production commenced in 1871 and since that date mining at Cobar has been more or less continuous. The field has produced copper, gold, and silver to the value of approximately £A27,000,000. Cobar has been the most important producer of copper in New South Wales, and in recent years, has also been the most important gold-mining centre. The Zinc Corporation Limited is carrying out, with the aid of the Bureau, an extensive geological and geophysical examination of the area, with the hope of finding other orebodies. The Bureau itself has extended geological mapping over an area of approximately 2,000 square miles in the Cobar-Nymagee-Canbelego district with the ultimate aim of discovering other ore deposits, or even fields of the Cobar type. In the Nymagee district, North Broken Hill Limited is also carrying out, in co-operation with the Bureau, an extensive exploration programme. The history, production, reserves and prospects of the New Occidental, Chesney, and New Cobar mines are discussed in this report.

Bores sunk at Cremorne in 1891 struck coal at approximately 2802 feet. A company was formed to work the coal, but was refused permission to operate at Cremorne. A site at Balmain was secured, and the Birthday Shaft was sunk to a depth of 2,937 feet between 1897 and 1902. This report provides an overview of the occurrence of natural gas and workings for the period 1897 to 1948. Gas yields, commercial production, leakage problems, and the use of testing to determine the behaviour of gas in the mine are the key subjects that are addressed in this report.

In response to a request from Mr. W.H. Williams, Director of Mines, Tasmania, a geological survey was made of the asbestos deposits situated near the tunnel on the Emu Bay railway, 5 miles north-east of Zeehan. A programme of investigation was set out involving a detailed survey of the deposit, prospecting and development work, an assessment of potential fibre grades and ore values, and research into milling practice and market utilization of fibre. The geological survey and related investigation, which are the focus of this report, were concerned mainly with the first three items. Three plates, including a geological map, surface plan, and a plan showing underground workings and effective grades, are attached to this report.

Report on mine maintenance, costs, equipment, employment, reserves, and workings.

Report on mine maintenance, costs, equipment, employment, reserves, and workings.

Report on mine maintenance, costs, equipment, employment, reserves, and workings.

Report on mine maintenance, costs, equipment, employment, reserves and workings.

Report on mine maintenance, costs, equipment, employment, reserves, and workings.

Report on mine maintenance, costs, equipment, employment, reserves, and workings.