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  • These notes deal with a brief experimental seismic survey undertaken by the Bureau of Mineral Resources for the Victoria Railways. The object of the survey was to determine whether the seismic refraction method was suitable for subsurface exploration in the area between Dynon and Footscray Roads, West Melbourne. The information desired by the Railways was concerned with the existence or otherwise of a "foundation" rock capable of supporting constructions associated with railway sidings and marshalling yards. Records of seismic refractions were obtained along three traverses.

  • The sample of diatomite submitted for micro-examination came from a low bed on Beach Range at 1,110 feet above sea-level. The results of the examination are described herein.

  • In October, 1951, geologists G.F. Joklik and S.A. Tomich from the Harts range party of the Commonwealth Bureau of Mineral Resources inspected the section along the Ross River in the Fergusson Ranges fifty miles east of Alice Springs. They collected fossils from several localities discovered by C.T. Madigan, who had regarded the high fossiliferous horizon as basal Larapintine. He describes the rocks as 'worm-eaten quartzite, with moulds suggesting Isoarca' and remarks that 'no good fossils were found'. It is this bed that has yielded the Upper Cambrian fossils. Fossils collected in the deeper horizon generally confirm Madigan's observations. The results of this investigation are recorded and discussed in this report.

  • This statement sets out the results of drilling by the Bureau within Swansea Sub-area N.S.W. (J.B.C. plan BG-4). The area investigated comprises approximately 115 acres, about 2 miles south of the township of Swansea in the parish of Wallarah, Country Northumberland. In the Swansea area 'test and define' core drilling by the Bureau has indicated coal reserves of approximately 302,000 tons within the physical limits required for open cut exploitation. This total is made up of more than 87,000 tons in the "Open Cut Block" and 215,000 tons in the "West Block". Proving is recommended for the open cut Block and for the West Block, except that in the latter area the obstruction which will be offered to open cutting by the presence of the P.M.G. cable should be considered before proving is undertaken.

  • During 1951, Mr. E.P. George, a resident of Maldon, reported that he had discovered areas in the Maldon gold field which showed definite radioactivity on a portable Geiger counter. Samples submitted by him from time to time were tested in the laboratory, and showed slight radioactivity. Although the results gave no indication of the presence of a deposit of commercial value, the opportunity was taken of the presence of a geophysical field party in the Woodend district to pay a brief visit to Maldon, so that the activity present could be recorded on the Bureau's instruments. The party comprised two geophysicists, who spent half a day in the area.

  • These preliminary notes deal with the sequence as it is found in the Giralia Structure. The analysis of the Cretaceous-Tertiary megafauna is described. The findings of the investigation with respect to the sedimentary sequence are discussed.

  • The period 7th to 28th January, 1951 was spent at Selwyn by the writer: approximately one week was spent in preparing a semi-regional map at a scale of 1 inch to 400 feet; one week was given to mapping a smaller area at a scale of 1 inch to 40 feet. Level plans have been constructed showing what are considered to be the broad outlines of ore arrangement and structure and a number of sections have been constructed. Nineteen plans and sections illustrate this report. Twelve typical ore and rock specimens were studied in thin section and the information obtained has been incorporated in this report. An account of the regional geology of the prospect and the geology of the ore deposits is given in this report.

  • 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.

  • Thirty-nine samples of bore cores from Stockton No. 2 Diamond Drill Hole, at Collie, were submitted for micro-palaeontological examination. The results of the examination are described in this report.

  • The first airborne scintillometer surveys to be carried out by the Geophysical Section of the Bureau have now been completed. In this work the Shoran radar positioning system was also used for the first time. Detailed surveys were made over an area of about one thousand square miles surrounding the Rum Jungle granite and one of about twenty square miles in the Edith River district. In addition, flights were made over several other known granite masses in the northern part of the Northern Territory and along both sides of the railway line from Batchelor to Katherine. In addition to the Dakota aircraft, an Auster aircraft was chartered for some experimental low-level flights over areas of special interest selected on the basis of indications discovered during the survey by the Dakota. Instruments and methods used in the course of the surveys, results, and conclusions are discussed.