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Murowa diamond mine : ウィキペディア英語版 | Murowa diamond mine
The Murowa diamond mine is a diamond mine located in Mazvihwa, south central Zimbabwe, about 40 kilometres from the asbestos mining town of Zvishavane in the Midlands province. The mine is majority owned and operated by the Rio Tinto Group, which also owns the Argyle diamond mine in Australia and part of the Diavik Diamond Mine in Canada. The mine is a combination of open pit and underground construction; current estimates put construction costs at $61 million USD and mine reserves are 19 million tonnes of ore, with an ore grade of per tonne. ==Geology of the Deposit== Murowa consists of three north-trending kimberlite pipes, intrusive into the Chivi suite granites of the Zimbabwe Craton. The kimberlites have been dated at 500 Ma.
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