1948
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In November, 1947, at the joint request of the Queensland Government and four companies which are associated with the search for oil in the area, the Bureau commenced geophysical work in the Roma district of Central Queensland. During the first phase of the geophysical operations, gravity and magnetic methods were applied in the reconnaissance of a large area. The object of these operations was to disclose gravity or magnetic anomalies which might be related to geological structures, indicate the broader structural elements of the sedimentary basin in which the oil and gas occur, and enable areas to be selected for investigation by more exact methods. The purpose of this report is to state clearly the geological problem and the geophysical methods adopted in the attempt to solve it. The geology of the area, possible oil-bearing structures, and the application of geophysical methods to date, are discussed. A sketch map and geological section plan are included.
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This report describes the results of a micropalaeontological examination of samples taken from 27 to 62 feet down.
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The report describes the results of a micropalaeontological examination of four rock samples from the Kimberley District.
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In August, 1947 the Bureau was requested by the Clifton Brick and Tile Company to carry out vibration tests on that Company's brick pit at Preston, Victoria. Tests were carried out at the brick pit on December 17th, 1947 and February 2nd, 1948 by officers of the Bureau. Six charges of explosives were detonated at different points in the brick pit and the amplitude of the ground movement was recorded. Additional records were made of ground movement due to other causes, such as vehicular traffic on a public road-way adjacent to the brick pit. It is the purpose of this report to summarise the results of the tests by tabulating the vertical ground movement recorded and to compare one with another, the amplitude due to different causes.
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The report describes the results of a micropalaeontological examination of samples taken from the depth of 30 to 100 feet.
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Boring commenced in the Broadbeach area on an East-West line 500 feet south of the northern boundary of DC22. Subsequent boring was carried out along lines 1300 feet, 2100 feet, 2900 feet, 4500 feet, 6125 feet, 7740 feet, 9300 feet, and 10900 feet south of the northern boundary of DC22. The results of the beach sands investigation are presented here. Estimates of the tonnages of heavy-mineral concentrates, the average grades of the heavy-mineral bearing sands and the average thickness of overburden, are tabulated. The complete set of data, from which these figures have been calculated, is attached as an appendix to the report.
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Details concerning the reserves of iron ore in Australia have been tabulated in this report. The report provides estimates of the grade and probable reserves of ore for the known Australian deposits.
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The area was bored and sampled in May, 1948. Bores were put down to water level, using a post-hole digger. When the sand brought up from the boreholes appeared to contain appreciable quantities of heavy minerals, it was sampled by quartering. Sample weights, volumes, and dry concentrates were determined. Percentage composition of concentrates was determined by grain counting. The estimates of the quantities and grades of heavy mineral concentrates, the quantities of overburden, and the quantities of each of the heavy minerals are tabulated in this report. Data collected in the course of the investigation has been tabulated and is appended. Accompanying locality and section plans have been included.
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This report describes the results of a micropalaeontological examination of two rock samples from the Kimberley district.
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This report describes the results of a micropalaeontological examination of eight rock samples from Mount Canaway.