Lawlers-Goldmine
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The Lawler - gold mine is located 23 km south-west of Leinster in Western Australia, Australia.
Is operated mining since 2008 by Barrick Gold as part of its Yilgarn South operation, which consists of two other mines to which Darlot - Centenary Gold Mine and Granny Smith gold mine.
History
Gold was discovered in this region in 1894 by Patrick Lawler Lawler and the city named after him, which was established in the vicinity of the mining industry, as in the nearby creek gold was found. Lawler is a ghost town and preserved is only the physical structure of the police station.
In 1986 the open pit. The mining area was initially owned by Plutonic Resources, an early and prominent Australian company operating the exploration of deposits. Homestake Mining Company took over Plutonic in April 1998 and Homestake was acquired by Barrick Gold in 2001.
Gold stock
The mine is located in the Norseman - Wiluna greenstone belt.
Gold is found in sediments and ultramafic rocks, as well as in quartz veins associated with sandstone. The veins have a thickness 2-15 meters.
Mining operations and environmental
A crushing plant prepares the ore rock that is transported over a distance of 4 kilometers from the underground. After grinding parts of the gold are obtained in accordance with its weight, and a carbon in leach process subjected to gain further gold, Cyanidlaugen method. Barrick Gold emphasizes that it controls a safe procedure in the handling of cyanide and refers to a certification.
In the process of cyanide leaching of gold is chemically bound in highly toxic leachates. After filtration and precipitation occurs brown slurry, from which, after washing and drying, by reduction to unrefined gold. This process produces hydrogen cyanide and cyanides, which may escape into the environment in spite of recycling of the liquor. This may, inter alia, happen by accident, leaks and disasters. All materials incurred in this process are toxic. Although these are easily decomposed and degraded in nature, yet the resulting large slag heaps and cyanide dust may be distributed in an uncontrolled manner by wind and water, uncontrolled discharge of toxic substances into the environment and cause serious ecological damage.