Legacy product - no abstract available

The occurrence of ferruginous laterite in the vicinity of Moss Vale, Bundanoon and Wingello, County of Camden, has long been known. In order to define any zones enriched in alumina, a subsurface prospecting campaign was undertaken by the Australian Aluminium Production Commission at Wingello during July and August, 1948 and at Ellsmore in the early part of 1949. The results of this investigation and previous work are summarized in this report. Detailed descriptions of the laterite and of the individual deposits are given.

At the end of 1945 the area dredged by the Bulolo Gold Dredging Co. Ltd. was 831 hectares. At that time 307 hectares remained to be dredged and of this 227 hectares contained soil which has been shown by soil analysis to be reasonably good. Resoiling would not be practicable on about 70 hectares of this area, as the Company plans to dredge this section twice, first with shallow and then with deep-digging dredges. Similar soil exists on 3-400 hectares classified previously by the Company as marginal ground, but which, since the increase in the Australian price of gold, is now probably quite profitable. This makes the total area that might be suitable for resoiling about 500 hectares compared to 1,281 hectares that either has been dredged or to which for other reasons resoiling is not applicable. Revenue to the Administration from the gold produced at Bulolo is over £1,000 per hectare from royalty alone and as most of the area has now been worked it seems questionable whether resoiling is worth further consideration at this stage. No provision was made for resoiling in the terms of the original mining tenements, but the Company's officials have expressed willingness to co-operate in carrying out the wishes of the administration. It has been considered impracticable now to resoil the areas that have been dredged or to rebuild the existing dredges for mechanical resoiling, but if the Department of Internal Territories considers that the matter should be pursued further, the Company might be asked to consider removing soil from the dredge path by bulldozer or other mechanical means and replacing the soil on the flattened out tailings after the dredge has passed; also to provide details of the economics of carrying out a similar scheme on the areas in which values were previously considered to be marginal.

This report records the results of a micropalaeontological examination of samples from Eva Downs Station. A detailed description of the samples is given in the report.

The possibilities of finding evaporite deposits in Western Australia were investigated by C.L. Knight and E.K. Sturmfels on a reconnaissance trip from 12th September until 14th October, 1949. The localities in which primary gypsum beds or other indications of evaporites at depth were found or from which they are reported, are classified on the following pages according to the geological formations, and their position is shown on two accompanying maps.

Coal outcrops in the bed of a small gully tributary to the Severn River, at a point 7 miles north of the village of Ashford, 36 miles north of Inverell, New South Wales. A small colliery has been developed in the Ashford Seam and worked intermittently until 1925, mainly to supply coal and coke to the Silver Spur mine near Texas, Queensland. The coalfield and extensions to the north and south have been examined by officers of the New South Wales Department of Mines, the Australian Aluminium Production Commission, the Joint Coal Board and others. During March, 1949 a diamond drilling programme was initiated by the Bureau of Mineral Resources, Geology and Geophysics and both geological and geophysical investigation of the area was carried out by the Bureau during the early phases of the drilling campaign. The geology of the area, nature of the coal, and drilling results are discussed in this report. Logs of diamond drill holes and percussion bores sunk by a former lease-holder are given in the appendix.

This report, on a collection of rocks made by M.A. Condon from the Northwest Basin, is divided into two sections. Section A gives a detailed description of lithology and the microfaunal content of the samples. Section B comprises stratigraphic and faunal notes.

This report describes the results of a micropalaeontological examination of samples from the Kopperamanna bore.

Results are given of investigations carried out to detect any variation in the relative proportions of the several heavy minerals in heavy concentrates separated out from beach sands of the Broadbeach Recreational Area. The possible variation of the thoria content of monazite in the area is also investigated. Results indicate a systematic variation from east to west in the proportion of Zircon, rutile and ilmenite in the concentrates. The thoria content of the monazite in the area is shown to be constant within experimental limits.

This report describes the results of a micropalaeontological examination of rock samples from the Northwest Basin, Western Australia.