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  • The Provisional Administration of the Territories of Papua and New Guineas is investigating the possibility of manufacturing portland cement in the vicinity of Moresby and the question of supply of raw materials in that area has been referred to the Bureau of Mineral Resources. No field investigations into the supply and distribution of these materials has yet been undertaken, and these preliminary notes have been compiled from geological data and observations made available from previous geological reports. The raw materials from which portland cement is produced are limestone clay or shale and a small quantity of iron oxide. The availability and suitability of rock materials for cement manufacture in the Port Moresby area are discussed at length in this report. The general geology of the area and the availability of other materials required for the manufacturing process are briefly described.

  • The Wolf Creek Crater is the second largest crater of meteoritic origin to be discovered on the earth's surface. An outline of the history of the discovery and the situation of the crater is given in this report. A general description of the crater is presented including dimensions, appearance, types of sediments involved and structure of the crater. An interpretation of these factors is given. A general discussion is included with emphasis on meteoritic craters as distinct from craters resulting from other causes.

  • Attention was directed to the inadequacy of supplies of acid grade fluorspar in Australia when the Bureau of Mineral Resources was asked to sponsor an application to import a quantity from England in 1948. The British Ministry of Supply released a proportion of the amount required but advised that the supply position in England was not secure and only limited quantities could be released for export in the future. The Ministry suggested that if known Australian requirements were likely to be heavy, some material might be supplied as a matter of urgency. An investigation of the fluorspar industry in Australia was then undertaken to estimate future requirements and the extent to which these could be met from domestic sources; the results of this investigation are the subject of this report. The uses, grading, consumption, supply, prices, and projected future supplies of fluorspar are discussed.

  • This report is a summary of information collected between November, 1948 and July, 1949 in the course of visits to the United Kingdom and the United States. The main subjects investigated were the complete gasification of coal, particularly in respect of its application to Victorian brown coal, the production of oil by synthesis and the production and refining of shale oil. Information was sought on a considerable number of other interests in the field of fuel technology as the opportunity offered. The authorities consulted were invariably experts in their respective fields, and great care was taken to record their information accurately. The report is a summary of recent developments and not an exhaustive study of the subjects mentioned. A considerable mass of detail has been excluded but is available on record for further reference.

  • This report covers gravity surveys carried out by the Bureau of Mineral Resources in the Leigh Creek area of northern South Australia between May 10th and June 23rd, 1949. Field work was carried out by the writer using a Heiland Gravimeter No. 58. Three separate areas were investigated, namely, one north of Lyndhurst, the Southern Basin near Copley and the Telford Basin. The work on them differed in character and will be described under separate headings. Four plans showing some results from the geophysical surveys are included.

  • This report is a summarised account of an investigation into the heavy mineral content of three bores, put down by the Roma Blocks Oil Company. The positions of the bores and a short account of the geology of the area are given, together with results of the work to date, and an evaluation of the prospects of correlation by petrological means.

  • An examination of a small area flanking the Molonglo River at Acton was undertaken at the request of the Department of Works and Housing. The construction of the weir across the river within the area examined to raise the water level to 1825' is proposed, and the geological investigation was carried out in connection with this proposed work. Aspects of general geology and engineering geology are discussed. A geological plan and sketch sections are included.

  • The Northern Australian Development Committee nominated the region of the Ord and Victoria rivers to be surveyed by the Northern Australian Regional Survey, when the Barkly Region had been completed. The immediate objectives of the Survey are "to accurately record the nature of the country, to establish a sound basis upon which the production possibilities of the Region may be appraised and to make general recommendations concerning development and further investigations." It was decided that the region should include the Army Four Mile Map Sheets of Delamere, Victoria River Downs, Wave Hill, Birrundudu, Limbunya, Waterloo, Auvergne, Port Keats, Medusa Banks, Cambridge Gulf, Lissadell, Dixon Range, and Gordon Downs, and that the field work would be commenced during the 1949 dry season. The techniques and methods used to complete this survey work are noted. The stratigraphy, pedology, and economic geology of the area are described in some detail.

  • The Nerrima dome is situated in an area of gentle folding 90 miles south-east of Derby in the Kimberley Division of Western Australia. The topography is essentially flat with local ridges formed over the more resistant sandstone beds of the Liveringa Formation. Outcropping formations are Permian and include the lower part of the Liveringa and the top part of the Noonkanbah Formations. The Liveringa Formation consists mainly of sandstones and grits and forms ridges which practically surround the structure; the Noonkanbah is mainly clays and limestones which have been reduced to flat plains with low outcrops of limestone and calcareous sandstone. Vertical closure of the structure is about 250 feet over an area of 30 square miles. The cores of Nerrima No. 1 Bore have been examined and at the present depth of 4271 feet the bore appears to be still in Permian rocks although no reliable interpretation of the subsurface geology at Nerrima can be made without further detailed information from areas to the north.

  • For the projected development of the hydroelectric power resources of the Laloki River, Papua, a diversion weir will be required. Two sites have been selected by the officers of the Department of Works and Housing, downstream from Rouna Falls and another site, upstream from the falls, which would be suitable for a large scale power development. An inspection of these sites was made in order to indicate any geological difficulties which may be expected. The situation, physiography, and geology of the proposed sites, as well as the suitability of these sites, are discussed in this report.