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The region described here lies inland from the coastal towns of Cairns and Townsville in North Queensland, and extends west 250 miles to Croydon: it is rectangular and has an area of about 37,000 square miles (PI. 38). The map area extends from longitude 145° 30' E. to longitude 142° 10' E.: the most northerly point is at latitude 16° 20' S. and the southern boundary is along latitude 20 00' S. It includes the whole of the Clarke River, Georgetown, Einasleigh, and Atherton 1: 250,000 Sheet areas, and parts of the Mossman, Normanton, Red River, Croydon, and Gilberton Sheet areas. The first geologists visited the area about 1870 after the discovery of economic deposits of gold and later of tin, copper, tungsten, and silver-lead. Most of the early geological mapping was carried out in the mineral fields, although a few syntheses of the regional geology were made. In 1956, a combined party of the Bureau of Mineral Resources and the Geological Survey of Queensland commenced mapping on the Georgetown, Einasleigh, Gilberton, Clarke River, and Atherton 1: 250,000 Sheet areas, under the leadership of D.A. White (BMR). This survey continued each year and by 1963 had extended north to the Cooktown/Cape Melville area. I was a member of the survey in North Queensland from 1957 to 1963.

The object of this publication is to present statistical information which may be utilized in conjunction with the Australian mineral deposits described in Bulletin No. 72. The minerals and metals dealt with are arranged in alphabetical order. As far as possible the ore minerals are described under the name of the metal, but there are some exceptions to this rule. All tonnages are in long tons (2,240 lb.) unless otherwise stated. Statistics of Australian mine production are compiled mainly from data supplied by the State Departments of Mines, supplemented in places by other information made available to the Bureau of Mineral Resources. Such additional data are obtained from producers unless otherwise stated. The figures thus derived are more detailed than those of the Commonwealth Statistician's mine production statistics a series begun in 1952, and based also on information from the Mines Departments with some adjustment. Because of the difference in sources drawn upon and the degree of supplementary information employed, the two sets of figures do not agree in a few places. Import data shown represent full imports. The values of imports prior to 15th November, 1947 were recorded in British currency values f.o.b. and are so given in this Bulletin; as from that date, quoted values of all imports represent the f.o.b. values converted to Australian currency at the current rate of exchange on the day of import of the goods, and are as they appear in the Overseas Trade Bulletin. ? refers to £Australian, except where £ sterling is quoted in the same context when £A is used to avoid confusion. Australia changed to decimal currency on 14th February, 1966. Values expressed in £ (or£A) in this Bulletin should be multiplied by 2 to obtain values in $ (Australian). $1 = 1 0 / - (Aust.) [ = 8 / - (stg.) = $1*12 (U.S.) approx.].

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