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  • This Bulletin presents the results of detailed studies of the Tertiary marine sequence in Gippsland, Victoria. Most of the information used in it has been obtained as a result of scout drilling jointly by the Victorian and Commonwealth Governments and of wildcat drilling by private companies. Though primarily a detailed study of a local problem, the results cannot frail to have an important bearing on the stratigraphy of the Tertiary rocks in the Australasian region and this in turn will facilitate the study of problems involving palaeogeography and correlation with extra Australian areas. The results will also have an important bearing on a major economic problem the search for oil in Australia.

  • The investigation was carried out on July 6th and 7th in company with Mr. S.B. Dickinson, of the South Australian Mines Department, and Mr. Kevin Smith, of Broken Hill Pty. Ltd., whose services were made available by courtesy of the Company. Mr. Smith had worked on the Teetulpa goldfield in 1913 and the visit was the result of his recalling that he had seen quartz crystals in some of the workings at that time.

  • The Wallendbeen talc workings are situated just east of the Wallendbeen township and railway station in the parish of Wallendoon, County of Harden, New South Wales. The workings, which consist of innumerable pits and shafts, are distributed along a narrow belt of country, usually more than 200 feet wide and extending from approximately 2 miles north to 1/2 mile south of the railway. The main workings at present are at the southern end of the field and the two producing pits were inspected. An examination was also made of a shaft at the northern end of the field. The talc is second-grade material, occurring both massive and schistose and should be referred to as steatite or soapstone. This report provides an overview of the geology and workings of the deposits.

  • Langbien's Bore is situated about 12 miles south-east of W.R. Johnston's Bore previously reported upon. The samples examined are from a depth of 50 feet down to 450 feet.

  • No. 27 Bore, Mirboo North, is one of a series of bores being drilled in that area to prove the extent of the bauxite deposits. This report describes the results of a microscopic examination of the samples taken from this bore. Samples were taken from between the depth of 0 to 83 feet.

  • The Chilcot copper mine is situated 15 miles south-south-west from Orange, from which it may be reached by reasonably good road. It was examined during 1942 by Dr. N.H. Fisher, Chief Geologist, Mineral Resources Survey, who recommended that a geophysical survey be made to search for additional ore shoots along the lode channel (1942/020). The geophysical survey was made during the three weeks ending 19th December. Operations were commenced over the area north-east of the mine, extending a distance of 550 feet from the mine, thus covering the part favoured by Dr. Fisher for extension of the lode channel. Later the survey was extended a similar distance to the south-west and the north-eastern part was extended a further 150 feet. Methods used comprised geomagnetic, spontaneous, polarisation, electro-magnetic and potential ratio. Traverses were placed at 50 feet intervals and observations by the various methods were made at intervals of 25 feet and, in some parts, at closer intervals. The results of this survey are discussed herein.

  • This report follows a preliminary report dated 9th September, 1942, and it is not proposed to recapitulate the matter contained therein, although some references to the preliminary report are necessary. The principal purpose of a second visit to the Lakes was to determine accurately the area of useful salt-bearing surface and the nature of the beds. Much evidence confirmatory of the views expressed earlier regarding the structure of the lake beds was noted. However, a plane-table survey revealed that the total extent occupied by recoverable salt is considerably less than a casual inspection would suggest and consists of the following areas, which are shown on the accompanying plan.

  • Bore No. 3797 on A. Holmes' property is situated about 25 miles north-west of Bore No. 3785 on W.R. Johnston's property reported upon 12/11/41, 19/1/42 and 11/3/42, and about 20 miles north of Bore No. 3752 on G.M. Taylor's property reported upon 1/9/41. The samples examined are from the depth of 50 feet down to 750 feet.

  • The Moonta-Wallaroo copper field was discovered in 1860 and has been one of the most productive copper fields in Australia. At the time that large scale mining operations ceased in 1923, copper to the value of over £20,000,000 had been produced. At the present time no active mining is in progress and the old mines are closed and the mining plant completely dismantled. There are two main copper producing areas in the field, namely Moonta and Kadina which are 10 miles apart. There are a number of smaller copper areas between and around the main ones. A recent investigation by Mr. S.B. Dickinson of the South Australian Mines Department indicates that while some of the old mines have small known ore reserves, the cost of re-establishing these mines would be too high to warrant such an enterprise. It is probable that all the surface showings of copper have been fully investigated but it is also probable that many lodes exist which show no surface signs. How these lodes are to be discovered is a matter of immediate concern. The present report deals with an extensive survey of parts of the Moonta and Kadina sections of the field. The work was commenced on a large layout pegged to the south-west of Beddome's and Green's lodes on the centre belt of fracturing at Moonta. Following the findings of the test report, the layout was covered by potential ratio and phase surveys and by a self-potential survey. Upon resumption of field work it was decided to use the electromagnetic method in a large scale test on Beddome's layout. Some self-potential and potential ratio work was carried out on the Kadina layouts, but it was found that these methods suffered from the same disability, namely a great number of effects which obviously were due to lode shears, as had been found in the case of Beddome's layout. In this report, the interpretation is based solely on the results of the electromagnetic surveys.