Legacy product - no abstract available Never published, see Record 1965/048 instead

The writer spent four days in 1949 in the Adaminaby-Kiandra Area with J. Glover mapping the country north-north-east of the present Tunnel Line. In 1951 a fortnight more was spent on the Tunnel Lines themselves by the writer under the guidance of senior geologist D.C. Moye and geologists K. Sharp and C. Wood, who provided a large amount of information not yet available in written form. All sediments in the Tunnel Area are Ordovician, and in the case of the Tumut Pond beds an even older age is possible.

In the various methods of geophysical prospecting, sensitive instruments are used on or near the surface of the earth to measure effects which arise from differences between the physical properties of rocks, ores and minerals. The analysis and interpretation of these measurements permit conclusions to be drawn concerning the sub-surface geology and the presence or absence of orebodies, coal seams, and the like, or of structures likely to be favourable to the occurrence of oil, etc. The principal physical properties of rocks which are useful in geophysical prospecting are density, elasticity, electrical conductivity, radio-conductivity and magnetic susceptibility. Aeromagnetic survey methods, their present use, and results of such surveys, are discussed in this report.

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.

This report comprises some remarks and suggestions regarding the stratigraphy and micropalaeontology of the Tertiary of Australia, with reference to some recent publications and discoveries in the field. The "Stratigraphy of the Caenozoic of the East Indies based on foraminifera "(I.M. van der Vlerk, 1948) is reproduced as an enclosure to this report.

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.

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.

Samples submitted from this bore were taken from the depth of 25 feet down to 475 feet. This report comprises a synopsis of the lithology of the samples after washing, together with notes on the samples.

This report is supplementary to a report on the Kuridala Copper Field, Cloncurry district, Queensland, by C.J. Sullivan and R.S. Matheson (1950) and should be read in conjunction with that report. Sullivan and Matheson showed that, in the known deposits, ore occurs in the Hampden Fault, where slates in the hanging-wall of the fault are thrust against the resistant amphibolites occurring in the footwall (western side) of the fault. The rocks to the west of the fault were known, from mapping carried out by Broadhurst (1936), to be folded into a synclinal structure and it was postulated by Sullivan and Matheson that further ore may be found where the fault intersected amphibolites occurring stratigraphically below the amphibolites near which the known ore occurs (Sullivan, and Matheson 1950, Plate 1, Regional Cross Section). It was realised by Sullivan and Matheson that the prediction of a position of the amphibolites, at depth, involved considerable uncertainty and it was thought that further mapping of the Western Syncline might enable a reasonably accurate interpretation of the position of the amphibolites to be made. The [present] field work was carried out between 20th August and 18th September, 1951, by K.W.B. Iten and R.A. Searl of the Bureau of Mineral Resources and J.H. Brooks of the Geological Survey of Queensland. The general postulations by previous investigators concerning the relationship of geological structure to ore occurrence were checked but no detailed investigation was made of the size, shape and grade of known ore-bodies; the present investigators consider that the interpretation by Sullivan and Matheson (1950) of the structural controls of ore deposition may be correct.