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  • The question of a geophysical survey of the Copperhead mining property at Bullfinch was discussed and it was stated that there was need for a geophysical survey to determine the detailed structure of the jaspilite bodies over a small area concealed by tailings at the eastern end of the jaspilite zone. Following preliminary tests, a detailed survey was conducted in December, 1946. The geology, nature of the problem, and results of the survey are discussed in this report. Two accompanying plans are included.

  • Results of a micropalaeontological examination of samples taken from a depth of 642 feet down to 1,568 feet. This series is in continuation of that reported upon 25/7/45.

  • The aim of this examination was to map in as much detail as possible the structure of the Apinaipi Anticline, which is situated on the coast of Papua, 100 miles north-west of Port Moresby. The survey programme and the geomorphology, structure, and lithology of the area are discussed in this report. Accompanying maps and section plans are included.

  • Shortly after I took up the appointment of Mineral Economist, the high quality of the mica from the Harts Range came to my notice. Accordingly, I paid a visit to Harts Range between the 22nd September and 4th October. In judging the possibilities of developing the mica deposits of the Harts Range, the difficulty is the almost complete lack of reliable detailed mining data in the past - production data for the later war years only are available. However, by comparing the degree of areal concentration of the pegmatites, the type of deposits and the quality and sizes of the mica so far produced with those in India, a reasonable picture can be obtained of comparative possibilities. The method of approach throughout this report, therefore, will be comparison of the Harts Range with India mica. This report gives an account of the present state of the Australian mica industry, including descriptions of current trade terms, the grading and classification of mica, and the Harts Range Mica Belt deposits. Suggestions and recommendations for the development of the industry are discussed.

  • In accordance with instructions an inspection was made of the Blue Spec Mine, Nullagine, from 22nd to 27th October. A survey was made of development work since Mr. Sullivan's visit on 20th September. This entailed a survey of the 3 level drives off No. 2E. and No. 2W. winzes and the new cross-cut from the main shaft at No. 3 level. The new shaft and cross-cut on M.L. 266 were mapped and the lode was sampled and assay results obtained. The water supply problem was investigated and a site chosen for a new domestic supply bore. Three accompanying plans are included.

  • This geophysical survey was undertaken as part of a campaign by the N.S.W. Mines Department and the Commonwealth Bureau of Mineral Resources to explore the ore possibilities of the Cobar Mining Field. Tests, made in January 1947, on specimens of ore from the operating mines showed that some of the ore from the New Cobar and Chesney Mines exhibited appreciable magnetisation due to its pyrrhotite and possibly magnetite content. The survey was commenced in March, 1947 using the magnetic method only as a first method of attack. Watts Vertical Force Variometers Nos. 15887 and 16128 were used, the field work being carried out by the writers. The geology of the area, object of the survey, results, and recommendations for future drilling are discussed in this report. Two accompanying plans are included.

  • Palaeontological note on a rock sample from a bore which was sunk a few feet into a mud island, west of Pelican Point, Lake Victoria, Gippsland.

  • Results of a micropalaeontological examination of samples from a depth of 2 feet down to 1185 feet.

  • Results of a micropalaeontological examination of samples taken from between the depths of 1450 and 1800 feet.

  • The region under review may be broadly subdivided into three distinct geological and geophysical areas which are here discussed as separate entities. The geology, physiography, and mineral resources of each area, and the future mineral prospects of the region as a whole, are discussed in this report.