1945
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Magnetic observations were made in the vicinity of the Range for the purpose of determining the probable 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. The results of the survey are presented in this report. Two accompanying plans are included.
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Bore No. 3853 on E.W. Langbien's Bullaroon Station, Bourke is situated 2 miles west-northwest from Bore No. 3825 on the same property and reported upon 7/12/43 and 2/11/44. This report details the results of the micro-examination of samples taken from 28 to 386 feet down.
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Results of a micropalaeontological examination of samples from bores Nos. 3855 and 3859. Samples were from the depths of 7 to 427 feet down and 1 to 977 feet down respectively.
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Sediments of Lower Cretaceous age are widely distributed in Queensland, northern New South Wales and northern South Australia. Their distribution is closely linked with the Great Artesian Basin, which covers an area exceeding 500,000 square miles. Many bores have been put down in this Basin to tap the aquifers which are present in the Jurassic rocks underlying the Cretaceous. Much material remains to be examined and a full report will be prepared after the examinations have been completed. This report comprises notes on the source of microfossil material, notes on the microfauna, a list of localities, and a distribution list of foraminifera. A map of the localities from which samples have been examined is included.
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Bore No. 3831 on W.L. Fennell's property is situated about 30 miles northeast of Langbien's bores. This report describes the results of a micro-examination of samples taken from 6 feet down to 1118 feet.
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Findings from a micro-examination of samples taken from the depths of 2,110 feet down to 3,533 feet 11 inches. The series is in continuation of that reported upon 11/10/44.
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A preliminary geological examination of an area at the northern extremity of Gungahlin district was carried out for the purpose of determining with fair approximation the area occupied by slate apparently suitable for brick-making. The geology of the area and the suitability of the site for a brick pit are discussed in this report. A geological sketch map of the district is included.
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Ten samples from a bore were submitted for micropalaeontological examination. The first sample was taken at a depth of 19-35 feet and the last at 417-425 feet. As these samples are the first in a series from bores in the Mt. Burr area, the fossil content of each sample is listed in detail, so that it can form a basis for the work on samples from other bores. At the end of the report a complete list of fossils determined, together with their distribution in the samples, is given.
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Report on mine maintenance, costs, equipment, employment, reserves, and workings.
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At the request of Mr. G. Lindesay Clark, Deputy Controller of Minerals Production, estimates have been made of the grade of ore likely to be delivered to the mill during the next two years under conditions of half-scale production. The methods of estimating tonnage and grade, as well as the resultant estimates, are discussed in this report.