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  • The following information regarding calcium phosphate deposits or phosphate rock in Tasmania has been obtained from the following sources - published reports and typewritten reports of the Tasmanian Mines Department and my own personal knowledge gained while Government Geologist of Tasmania.

  • Notes on the mica deposit, Hundred of Para Wirra, County of Adelaide, South Australia. Mineral resources and principle workings are described.

  • The samples of diatomite were received recently from the Director of the Geological Survey of New Zealand. The localities for the samples are given as Middlemarch, Wainui and Whirinaki. The three diatomites are of freshwater origin. The following notes are the result of microscopic examination.

  • Mullalyup is a small village about 140 miles south from Perth and 33 miles by rail south-east from Bunbury. The main highway between Perth and Bridgetown passes through the village. The region is occupied by Basement rocks which appear to consist mainly of schist and gneiss. The regional strike is about north-west. The hill slopes and lower levels carry a heavy cover of soil and the hilltops are mostly covered with laterite and, in places, high-level gravels. These gravels are widely distributed in this region. The mica occurs, as usual, in pegmatite dykes, and five such deposits are shown on the attached plan. Some difficulty was experienced in locating these deposits owing to the thick undergrowth and hill terrain and it is probable that other pegmatites exist in the locality. Search was confined mainly to the slopes and it was considered that soil in the valleys and laterite on the hill tops would obscure outcrops of any pegmatite dykes, except at intermediate levels.

  • Within three miles of Broken Hill railway station are numerous pegmatite dykes carrying a high proportion of massive felspar. A few of these dykes are worked sporadically by gougers. On June 8th and 9th several of the dykes which were being, or had been worked were examined in company with Mr. B. Hadley, Inspector of Mines. A description of the individual deposits and a discussion of production capabilities are presented in this report.

  • The occurrence of molybdenite deposits near Yetholme has been known for many years. The most important deposits are close to the eastern boundary of Ph. Yetholme, Co. Roxburgh. The deposits have been worked in a small way for molybdenite at several places, have been examined by several geologists, and have been investigated by two of the major mining companies. The result of this work has shown that although considerable tonnages are available, the molybdenite content is too low to make mining attractive. It is not proposed to describe the geology, mining excavations, and other factors affecting the field in this report since that has already been done in several previous reports. It is the purpose of this report, however, to point out that the Yetholme deposits contain a considerable amount of scheelite and may well warrant large scale mining for this now important ore of tungsten.

  • The presence of muscovite on Yinnietharra Station in commercial sizes and qualities has been known since 1913, but little active development was carried out in the locality until 1926, when a syndicate, formed in England, took up leases and began operations. Activity lapsed the following year, but desultory prospecting more recently has led to the production of a few small cases of spotted mica, some of which was sold in Melbourne in the early part of 1942. The deposits described hereunder are shown on the accompanying locality map, Plate 1. At this stage only brief references are made to deposits containing stained and spotted mica unsuitable for critical electrical or radio applications.

  • 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.

  • Legacy product - no abstract available

  • Phosphate deposits in the vicinity of Canowindra, Molong, Wellington and Borenore were examined in company with members of the Joint Parliamentary Committee on Rural Industries on the 27th and 28th February, 1943. Two slightly different types of deposit occur in these localities. These deposits are described herein.