1950
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The main sedimentary basins of Western Australia are arranged peripherally to the pre-Cambrian shield which forms the greater part of the state. In 1948, the Commonwealth Bureau of Mineral Resources, Geology and Geophysics, by arrangement with the government of Western Australia, commenced detailed geological reconnaissance of the Fitzroy and North-West Basins. In 1948 and 1949, the R.A.A.F. carried out a programme of aerial photography of these basins and this air-photo survey has since been used as the basis for mapping in the field. In the course of this work several discoveries have been made and as only brief mention of them has been made elsewhere they are included in this summary. The main areas of Palaeozoic sedimentation in Western Australia at present known are the Ord Basin in the far north-east, the Fitzroy Basin, the North-West Basin stretching from Onslow to the Murchison River, and the Irwin-Perth Basin stretching from Geraldton to Busselton.
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This report gives an overview of the bauxite resources of Tasmania. The report provides a summary of the work, investigation, and sampling conducted between 1941 and 1949. The mode of occurrence and types of bauxite are described. A description, which includes a statement of reserves, is given of each of the eleven individual deposits.
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A survey of Australian resources and consumption of antimony, both as metal and antimonial lead, was started later in 1949. This survey had been nearly completed in August 1950, when the Defence Supply Planning Branch of the Department of Supply requested that a survey of the antimony position similar to that for "Graphite" be prepared on their behalf. As the production and marketing of antimony metal is undertaken by one company only in Australia, and of antimonial lead by another, statistics of post-war production, civil consumption and end uses have been readily available.
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The island of Timor has attracted the attention of geologists for more than one hundred years. The first geological investigations were carried out on behalf of the Government of the Netherlands East Indies as early as 1829. This report has been compiled using information obtained during previous geological investigations, and the data supplied in existing geological reports, and comprises notes on the stratigraphy and structure of the island, with reference to oil prospects.
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At the request of the Defence Supply Planning Branch of the Department of Supply an investigation of the Australian graphite industry was undertaken early in 1950. The particular aspects to be considered in this investigation were listed by the Planning Branch as follows: the specific defence significance of graphite and an estimate of peace and probable wartime demands, the experiences during World War II where applicable, the present and future supple position, alternative methods of ensuring that demands are met in an emergency, and the method recommended to meet demands in an emergency. This report should be considered an interim report containing recommendations for early consideration by the Planning Branch.
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This palaeontological collection comprises 100,000+ locality based samples derived from BMR/AGSO/GA field survey programs, from external organisations (e.g. exploration companies, state geological surveys), or from donations or bequests by private collectors over the last 100 years. It also includes laboratory subsamples, residues and microscope slides and is often referred to as the F Collection or Bulk Fossil Collection.
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The deposits of heavy mineral sands along the East Coast of Australia are being investigated primarily to determine their content of monazite. These deposits contain most of the known world reserves of zircon and rutile for which they are being exploited at various localities. Monazite, a phosphate of cerium, lanthanum, praseodymium and other rare earths, with thorium silicate, is utilised commercially as a source of cerium and of thorium. In this investigation, the thorium content on the monazite is being determined on the basis of its radioactivity. A principal deposit, and two smaller deposits, in the Fingal-Cudgen area were investigated. The geology of the area, methods of testing, and the results of the investigation are discussed in this report.
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This report gives an overview of the known bauxite resources of Victoria. Descriptions are given of the general geology of the area, of the individual deposits, and of the bauxite.
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The Walloway Artesian Basin is approximately 160 miles north of Adelaide and is traversed by the main road from Adelaide to Maree via Orroroo and Hawker. The town of Orroroo lies on its western margin in the south-western corner of the Hundred of Walloway and the village of Johnburgh is situated in its northern part. The geophysical survey was carried out at the request of the Director of Mines for South Australia to assist his Department in the selection of sites for boring for artesian water and to delineate more precisely the limitations of the basin with regard to artesian flows. The gravity method was used as this method has proved successful elsewhere in determining the dimensions and form of sedimentary basins. This report gives an account of the survey and its results.
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During the period 10th October to 15th November 1950, the writer visited the Rum Jungle area in order to direct the local and regional geological mapping, with a view to establishing the geological relationship between the various prospects, the manner of occurrence of the ore bodies, and if possible the control of mineralisation. Owing to the short time available for the field work, the present report must be regarded as a critical preliminary study of the area to aid future planning, rather than a complete investigation. Only the broader aspects of mineralisation are dealt with in this report.