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Gypsum deposits in Western Mallee
Gypsum deposits in Western Mallee
Laing, A. C. M
Personal Author:
Publication Information:
Melbourne: Department of Mines, Victoria, 1975.
Physical Description:
8p. : 2 illus., 1 document.
Geological Survey of Victoria Unpublished Report 1975/79
General Note:
(Reference Abstract -- Abstract ) The main occurrence of gypsum in Victoria is in the Mallee Region where it is found both as earthy gypsum (copi) used for agricultural fertiliser, and crystalline gypsum. Crystalline gypsum is used extensively in the building industry for the manufacture of plaster of paris (for building). In 1972-73 141,579 tonnes was used in Victoria of which about 25% was mined here mainly form the Raak deposits (see Fig 1). The remainder was imported from South Australia where there is a very large deposit at Lake Macdonnell west of Ceduna in the Great Australian Bight. The Victorian deposits are thinner (3 ft as opposed to 12 ft), shallower and easier to work than the South Australian deposits. They can be dug directly by dragline whereas the South Australian deposits require blasting. The Victorian deposits are close to the railway and contribute significantly to railway funds by way of freight charges whereas the South Australian deposits are close to a port with bulk loading facilities. Besides the Raak plain there are significant deposits of crystalline gypsum in the Cowangie area. There area also deposits near the South Australian border southwest of Neds Corner.