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Batu Hijau mine
The Batu Hijau mine is an open pit copper-gold mine operated by Newmont Mining Corporation's subsidiary company PT Newmont Nusa Tenggara (PT Newmont). The mine is located east of the Indonesian capital Jakarta on Sumbawa, in southern Taliwang Regency, an island in West Nusa Tenggara. The mine is the result of a ten-year exploration and construction program based on a 1999 discovery of the porphyry copper deposit. Production began in 2000.
The mine utilizes a "truck and shovel" open-pit mining method, with ore reporting to semi-Autogenous Grinding and ball mills, followed by a flotation circuit. The finished product is a thickened copper-gold concentrate, which is shipped via pipe to a storage facility on the Indonesian coast.
The Batu Hijau mine has been the site of ownership disputes between PT Newmont and the Indonesian government based on agreements on the timeframe of which PT Newmont was required to transfer ownership of the mine to the government. There have been environmental controversies with the mine based on PT Newmonts practice of disposal of tailings in the ocean, and waste rock in the rainforest.
==History==
In 1990 mineral exploration on the island of Sumbawa resulted in the discovery of copper mineralization that would be developed into the Batu Hijau mine.〔(【引用サイトリンク】title=Batu Hijau mine site - Infomine )〕 Over the next ten years PT Newmont continued to delineate the resource and began developing the mine and building the required infrastructure. In 1999 construction was complete and by the next year Batu Hijau was producing ore.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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