1952
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A total of 16 rotary cored bores were sunk by the Bureau in Portions 14, 15, 16 and 17, Parish of Wallarah, Northumberland County, 5 miles south of Swansea. Approximately 1,100 ft. of "Test and Define" drilling proved a possible maximum of 960,000 tons of coal, or a minimum of 750,000 tons in the Wallarah Seam under an average overburden coal ratio 5:1. The overburden is mainly conglomerate. The geology of the area and mining are discussed in this report. The results of drilling are detailed in the accompanying plates, stratigraphic logs, and descriptive bore logs of the Swansea South area.
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The work done in this investigation was for use in the compilation of a large scale geological map of the A.C.T. The area mapped adjoins that mapped by Flinter and McInnes (1949) and L.C. Noakes (1946). The map accompanying this report includes all of the A.C.T. south of an east-west line through Tharwa. Geological features, including the physiography, stratigraphy, and structural geology of the area, are described in this report.
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Howards Springs are situated about 3.5 miles north-east of a point on the Stuart highway about 16 miles south of Darwin. They are seepage springs on a branch of the Howard River. Radioactive material was found in the area by Mr. L. Good, Box 273, Darwin, during October, and samples were sent to Rum Jungle for testing. A brief inspection of the area was made by the writer and Dr. N.H. Fisher on 7th November, 1952. It seems likely that the mineral causing radioactivity has been precipitated, probably by organic matter, from the spring water in the black clay layer, but the original source of the material is not at present clear.
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Legacy product - no abstract available
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For the evaluation of the petroleum prospects of a sedimentary basin, the following factors are generally considered. Lithology, mode of deposition, thickness of the sediments contained in the basin, source and reservoir rocks. Facies of the sediments, changes in facies and the trends of such facies changes. Relationship of the various formations to each other - conformity, disconformity, unconformity, regressive and transgressive overlap, erosional gaps and their significance structurally and for accumulation. Direct or indirect evidence for the presence of oil - seepages, traces or showings of bitumen, oil and/or gas existing bores, bituminous character of some of the stratigraphic members. Tectonics - folding (single phase, multiple phase), faulting, tectonic history and its bearing on migration and accumulation of oil. Types of tectonic traps, and stratigraphic traps in relation to folding and faulting (sandy facies near basement uplift, reef formation on crests of rising anticlines, sandy facies in connection with ancient fault lines). Some of these criteria can be applied to the North-West and the Fitzroy Basins, but it is realized that the information available is not complete enough yet to fully discuss all aspects involved. On the other hand it is felt that, at this stage, a brief review of the results already obtained can greatly assist in an outline of a future programme. It will be seen that much emphasis is laid on geophysical work i.e. gravity investigations for the regional aspect of the problem - the configuration of the basins - and seismic investigations of structures which are selected for deep testing. In our opinion the results obtained so far in the North-West Basin, by both types of geophysical work, have clearly demonstrated the soundness of this way of approach
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The Australian Antarctic Expedition 1911-14 established four absolute magnetic stations, namely Stations A, B, C and D. Two subsequent stations, Stations E and F, came into operation in 1950 and 1952 respectively. Because absolute magnetic observations had been made at different stations is was essential that the differences in the magnetic elements between the various stations be determined so that all data could be reduced to a common point. The observations were carried out during the period 31st March to 6th April 1952, whilst the Australian National Antarctic Research Expeditions relief operations were in progress.
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Samples from four bores in the Great Artesian Basin of New South Wales were submitted for micropalaeontological examination, by the Water Conservation and Irrigation Commission of New South Wales. These bores are Bore No. 8213, "Trenton" Coonamble, No. 8262, "Montrose", Dubbo, No. 8268, "Fair Oak", Dubbo, and No. 8272, Wanaaring, Bourke. The results of the detailed examination of these bores are given below.
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These documents have been scanned by the GA Library. Please refer to the document for contents.
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The distribution of marine Tertiary rocks in Australia is restricted to the western and southern coastal areas of the continent. The rocks represented are of Paleocene, Eocene, Miocene and Pliocene ages. Considerable material has been collected in stratigraphic sequence from many Tertiary localities in recent years and the detailed examination of the foraminiferal content of the rocks has yielded many startling discoveries.
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Legacy product - no abstract available Never published, see Record 1965/048 instead