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  • The presence of foraminifera in the Permian sediments of Australia was recorded as early as 1882. Some systematic work was done up to 1905, but there was no further investigation into these micro-fossils until 1937. A considerable amount of research is still necessary before it can be stated whether or not a definite system of zoning, based on micro-faunas, can be applied to the Permian rocks of Australia. It seems possible, however, that certain species may be characteristic of the Upper and Middle Permian deposits. In the extensive collections of Permian rocks examined from the Hunter River District in New South Wales, assemblages of foraminifera rather than restricted species have proved useful for zonal purposes and this method of zoning should prove valuable when more material is examined from the Permian deposits of other States.

  • A report on the Lake Cargellico magnesite deposit following a visit on 30th May, 1944.

  • King Island Scheelite Mine is located on the east coast of King Island and is sixteen miles by road from Currie, the principal port on the island. The open cut method of mining is employed and the mine is an important producer of scheelite. There is scope for greatly increased production from the open cut area alone and with a view towards assessing the full possibilities of the area as a whole, geological and geophysical surveys were started concurrently by the Mineral Resources Survey Branch in June, 1942. The geophysical field work was conducted between 19th June and 10th July, 1942.

  • This sample of bryozoal marl from Montagu, Tasmania, was collected by Mr. F. Canavan. It contains a faunal assemblage typical of the Balcombian Stage of the Middle Miocene as found in Victoria and can be referred to Longford substage of the Balcombian.

  • A brief report on the occurrence of beryl on Yinnietharra Station, Western Australia was prepared following a visit to the locality in December 1948. That report referred to three deposits: 1) 0.25 to 0.5 mile N.25°W. from The Cairn; 2)0.25 mile S.60°E from the Mica King mine; 3) Rowe's mine, 2 miles southeast from Morrissey Hill. The report stated that 20 or 30 tons of detrital beryl in large pieces could be picked from the surface with ease. It was pointed out that by collecting small pieces and wider search the immediately available tonnage might be doubled. In June 1944, the first two of the above deposits were again visited, as was one on Bidgemia Station not seen on the previous occasion.

  • The area was visited in company with Mr. R.S. Matheson of the Geological Survey of Australia in December, 1942, when eleven pigmatite bodies bearing mica and beryl were examined. The report furnished after that visit (1943/2), gives details of access, topography, climate and vegetation which are not repeated here. In view of the urgent demand in Australia for "strategic" mica, i.e. mica of quality equivalent to Clear and Commercial-clear, it was recommended that one deposit at Yinnietharra should be opened and prospecting of others carried on simultaneously. As a result of these recommendations, the Deputy Controller of Mineral Production started mining operations on the selected dyke by open-cutting in June, 1943. Although it was stressed in the abovementioned report that poor exposure of the dyke, on which there were no workings, rendered any estimate of the probable yield of marketable mica speculative, the results actually obtained were far below expectations, and a heavy financial loss on the project was incurred. Consequently, while the question of abandoning the mine was under consideration, a detailed examination of the workings was carried out in June, 1944, again in the company of Mr. Matheson, and the results of this investigation, which was not wholly confined to geological aspects, are embodied in the present report.

  • The Curragundi Bore is situated in Portion 15, Ph. Gingham, County Benarba, 12 miles east of Four Posts No. 2 Bore and 11 miles west of Midkin No. 3 Bore. It is about 40 miles southeast of Boronga No. 2 Bore reported upon 30/5/42. The samples examined for micro-fauna were taken from the depth of 50 feet down to 2107 feet 6 inches. The results of this micro-examination are recorded in this report.

  • Results of a micro-faunal examination of samples from bores Nos. 188, 195, 208, and 213, parish of Maryvale, Victoria.

  • These investigations were carried out at the request of the Secretary for the Navy. The following report is intended to confirm provisional information made available to naval personnel during and at the conclusion of the surveys. The Fremantle Degaussing Range is situated in Gage Roads near Fremantle Harbour. The position of the coils forming shallow and deep ranges is shown in Fig. 1. Deperming operations were carried out in Careening Cove, Garden Island. The objects of the investigation were twofold. First, to determine the average normal values of the vertical (Z) and horizontal (H) force components of the Earth's magnetic field in that part of the harbour which would be occupied by a ship in passing over the coils, and second, to determine the average normal values of Z and H in the vicinity of Careening Cove, Garden Island.

  • This report deals with the results obtained in tests with the electrical resistivity method on the brown coalfields at Morwell and Traralgon, Victoria, in an attempt to develop a rapid method of determining the presence of the coal and its depth below the surface. These tests were carried out in the latter part of 1943 by the Geophysical Section of the Mineral Resources Survey at the request of the Victorian Electricity Commission. Thirty-four resistivity-electrode separation tests were made over a wide variety of geological sections in the parishes of Maryvale, Hazelwood and Loy Yang. These tests were preceded by a number of tests by specific resistivity made on various types of overburden and on coal exposed in the open cuts at Yallourn. This report discusses the results of these tests although verbal information concerning them has already been made available to the Commission's officers. It will be shown that under certain conditions, the predictions of the depth to coal are reliable within fairly narrow limits while under other conditions the predictions are misleading. It is proposed in the first instance to outline the method and apparatus used in these tests. In addition, it is considered advisable to outline the methods of interpretation employed in order that the conclusions reached will by fully appreciated. In addition to discussing the resistivity results, the report deals briefly with the possibility of using gravity methods on the same prospecting problem. Calculations have been made of gravity anomalies to be expected from certain coal sections and it is shown that under favourable conditions this might prove of value in determining the presence and position of the coal.