| 西藏罗布莎蛇绿岩铬铁矿中的超高压矿物和新矿物(综述) |
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| 关键词:Luobusa ophiolite chromitite mantle minerals |
| 基金项目:中国地质调查项目(编号:1212010610107,1212010610105); 国家自然科学基金重大国际合作项目(编号:40610098) |
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| Ultrahigh-pressure Minerals and New Minerals from the Luobusa Ophiolitic Chromitites in Tibet:A Review |
| An unusual mineral group was discovered in the Luobusa ophiolitic chromitite on the Yarlung Zangbu suture of Tibet,which probably originated from the depth of over 300 km in the mantle.Minerals with indication significance of deep origin include: ①coesite with pseudomorphs of stishovite;②diamond as individual grains or inclusions in OsIr alloy;③Si-spinel within OsIr alloy or arsenite;④Si-rutile in chromite;⑤psuedomorphs of octahedral silicate minerals;⑥ mineral assemblage of wustite and native iron.In addition, four new minerals have been approved by ICMS.Similar to things of the Luobusa chromitite,ultrahigh minerals such as diamond and moissanite were also recently discovered from the ophiolitic chromitites in Polar Ural,Russia.The ultrahigh pressure minerals provide an important perspective for deep genesis of the ophiolitic chromitites,and upgrade the traditional knowledge of the shallow-depth genesis of ophiolitic mantle and podiform chromitite. |
| YANG Jing-sui,BAI Wen-ji,FANG Qing-song,RONG He.2008.Ultrahigh-pressure Minerals and New Minerals from the Luobusa Ophiolitic Chromitites in Tibet:A Review[J].Acta Geoscientica Sinica,29(3):263-274. |
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