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  • This statement gives the results of a scout drilling campaign conducted by the Bureau at the Kirby's Hill Area of the Western Coalfield of New South Wales. The area investigated comprises approximately 200 acres of the parish of Cullen Bullen in the County of Roxburgh. At Kirby's Hill itself a maximum of about 300 feet of Coal Measure rocks rests on Upper Marine beds, and this is one of the most westerly exposures of the Upper Coal measures. The purpose of scout drilling was to determine the suitability of the Lithgow and Irondale Seams for open cut exploitation.

  • In December, 1950, the Pakistan Government filed a formal application to Australia, through the Technical Assistance to South-East Asia Co-operation Scheme, for three geologists to carry out geophysical surveys in Pakistan. In May 1951, the geologists, J.F. Ivanac and D.M. Traves of the Bureau of Mineral Resources and D. King of the South Australian Mines Department, arrived in Pakistan. Their instructions were to carry out a geological survey of a portion of the Gilgit Agency, and to discuss with the Director of the Pakistan Geological Survey or any other Government Officer familiar with the problem, the alluvial gold deposits of Chitral River and the lignite deposits of West Bengal and Sind. Field investigations commenced from Gilgit in June 1951, and the party spent four months in the region. This report gives an account of the visit and the results of the investigation.

  • The beach sands on which investigations were carried out, were mainly from beaches along the eastern coast of Australia and from islands adjacent to this coast. A high percentage of the mineral grains of the heavy mineral fraction in these sands have grain sizes within the range -100 to +200, referred to British Standard Sieves. The grain size of the minerals, combined with the fact that the grains are quite well rounded, makes the heavy mineral sands an ideal subject for separation using the inclined method with the Isodynamic Separator. The use of this method, and the results obtained, are described in this report.

  • This statement sets out the results of drilling in part of the Minmi Area, Newcastle District. The area covered by the drilling grid totals about 390 acres and includes parts of Portion 130, Ph. of Teralba and Portions 15 and 26, Ph. of Hexam. This statement refers to the western and central blocks of the area. Proximate analyses and calorific value determinations of the coal cores were made by the New South Wales Mines Department laboratory in Sydney. The analyses here quoted indicate a composition roughly equivalent to that which might be expected for cleaned or hand-picked coal from this area.

  • In the Edith River area uranium occurs as meta-autunite associated with apatite and hematite in narrow siliceous reef formations which are in part brecciated and mylonized. The reefs, which dip steeply west and strike mostly north-north-west, occur over a length of about 3 miles in a north-south, sheared greisenized, zone in granite. Two main types of granite are present, a coarse grained granite and a finer-grained adamellite, which is intrusive into the coarse granite. In places partial digestion of the coarse by the fine granite has produced a porphyritic "hybrid" granite. All granites except the greisenized granite of the sheared zone give high background counts, 2 to 3 times as high as that of the sediments of the Brocks Creek group into which the coarse granite is intrusive. Within the reef formations the distribution of uranium-bearing material is patchy. In many places the best geiger readings are obtained where cross reefs or fractures with a north easterly strike cut the main reefs. Surface samples were taken across most places where significant Geiger readings were obtained and all returned less than .1% U3O8. Commercial production from the field will only be possible if the grade of the original ore has been greatly affected by surface leaching and a site was selected for a shaft to test the primary ore.

  • A total of thirteen rotary cored bores were sunk by the Bureau approximately one mile south of the village of Teralba in the Parishes of Teralba and Awaba, Northumberland County. The Great Northern Seam in places is sufficiently thick for open cut mining but the coal is generally of very poor quality and the overburden to coal ratio much too high to warrant further drilling. Continued prospecting of the Fassifern Seam in this area is not warranted, because of the very poor quality of the coal in this seam. This report contains an account of the operations, and describes the results of the geological investigations. The results of drilling are detailed in the accompanying plates and bore logs.

  • The Giralia Structure is an eroded, doubly-lunging anticline about 60 miles in length and 10 miles in maximum width. It is situated between Exmouth Gulf and the Lyndon River near the coast in the North West Division of Western Australia. In this investigation micropalaeontology has been applied to help in elucidating the surface stratigraphy of the eroded Giralia Anticline. The chronology, correlation and palaeo-ecology of the exposed sediments must be considered in evaluation their oil-possibilities. To this end examination of microfossils, principally foraminifera, aids materially in recognizing unconformities, structural conditions and facies changes, in dating and correlating strata and in interpreting ancient depositional conditions. The samples studied were collected by a field party of the Bureau of Mineral Resources during the winter months of 1950 and 1951. Additional samples were collected by the writer in visits to the area in July 1950 and July 1952.

  • The discovery of the heavy mineral deposit here described was made by the writer during the 1950 field season in Dampier Peninsula, when geological mapping of the area was carried out in conjunction with Mr. Hampton Smith, Consulting Geologist for Ampol Petroleum Co., Sydney. When traversing the southern west coast from Broome to Carnot Bay the writer noticed the presence of black-sand beaches in several places and he eventually took a sample from one of the best localities. When finalizing the report on the geology of the Peninsula, the writer asked for a detailed analysis of the sample. It was then discovered that it was composed mainly of ilmenite. The report provides an outline of the local geology and physiography. The location, composition, and extent of the deposits are discussed.

  • This report contains an account of the open cut coal investigations in the Cessnock Muswellbrook region. The area herein reported on is of 1.29 square miles, in the Parish of Howick, County of Durham. Twenty-two bore holes were sunk all of which, totalling 2,749 ft., were cored throughout. The conclusions herein reported are the result of field teamwork by two groups of the Bureau of Mineral Resources. The Petroleum Technology Party was responsible for all basic data obtained from boring. The Geological Party was responsible for locating boreholes, topographic surveying and interpreting and recording results inferred from the basic data. In addition, draughting, map compilation, and petrological and palaeontological determinations were carried out.

  • At the request of Australian Magnetite Pty. Ltd. of Melbourne and with the approval of the New South Wales Mines Department a geophysical survey was carried out over a lease held by that Company near Gulgong, New South Wales, in the Parish of Puggoon in the County of Bligh. The area is situated about 7 miles north of Gulgong where the Company operates a mill for crushing, fine grinding and concentrating magnetite ore. The pulverized, concentrated magnetite is used in the heavy liquid separation and cleaning of coal. The present supply of magnetite ore comes from the magnetite mine at Tallawang, about 12 miles from Gulgong. As a results of increasing difficulties in mining this deposit, the best part of which has already been stoped out, Australian Magnetite Pty. Ltd. is desirous of opening up and developing a new and suitable deposit in order to ensure the necessary continuous supply of ore to the mill. The deposit of magnetite in the Parish of Puggoon is partly exposed in outcrops and in a trench, and is probably of lens-like form. It occurs in a Silurian formation. The task set for the geophysical survey was to determine the full extent of the deposit and its approximate shape before a decision was made on a position for a new opencut.