| 西藏罗布莎蛇绿岩铬铁矿中金刚石的研究 |
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| 引用本文： | 白文吉,杨经绥,P.Robinson,方青松,张仲明,颜秉刚,胡旭峰.西藏罗布莎蛇绿岩铬铁矿中金刚石的研究[J].地质学报,2001,75(3):404-409. |
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| 作者姓名： | 白文吉 杨经绥 P.Robinson 方青松 张仲明 颜秉刚 胡旭峰 |
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| 作者单位： | 1. 中国地质科学院地质研究所,北京,100037
2. 达霍希大学海洋地质中心,Halifax,N.S.,加拿大 |
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| 基金项目： | 加拿大NSERC与中国国土资源部地质矿产调查局及中国国家自然科学基金(编号49972073) |
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| 摘 要： | 在西藏罗布莎豆荚状铬铁矿中发现过金刚石,但迄今仍有人因为自己所取的小试样中没有分离出金刚石而否定罗布莎等地金刚石的存在。由于金刚石涉及西藏雅鲁藏布江缝合线和蛇绿岩、铬铁矿成因等问题,笔者重新在罗布莎铬铁矿中取样,经过选矿,又在1500kg样品中选出了25粒金刚石和近70种伴生矿物。这就表明西藏金刚石是的确存在的,而且它和蛇绿岩的铬铁矿同是深部成因的产物。
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| 关 键 词： | 蛇绿岩 金刚石 西藏 |
| 修稿时间： | 2000年12月25 |
Study of Diamonds from Chromitites in the Luobusa Ophiolite, Tibet |
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| BAI Wenji,YANG Jinsui,P. ROBINSON,FANG Qingsong ZHANG Zhongming,YAN Binggang,HU Xufeng Institute of Geology,CAGS,Beijing,China Dalhousie University,Centre for Marine Geology,Halifax,Canada.Study of Diamonds from Chromitites in the Luobusa Ophiolite, Tibet[J].Acta Geologica Sinica,2001,75(3):404-409. |
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| Authors: | BAI Wenji YANG Jinsui P ROBINSON FANG Qingsong ZHANG Zhongming YAN Binggang HU Xufeng Institute of Geology CAGS Beijing China Dalhousie University Centre for Marine Geology Halifax Canada |
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| Abstract: | Diamonds have been reported from alpine-type ultramafic rocks and chromite ores by the authors in 1980. But unfortunately so far the reported diamonds in Tibet are unconfirmed. This paper deals with the new occurrence and characteristics of diamonids, which are recovered from chromite ores in the luobusa ophiolite. About 25 grains of diamond and alout 70 sorts of associated minerals have been discovered, including native elements: Cr, Cu, Ni, Fe, C, Si, Au, Pb, W, Ir, Os, Ru; Alloys: Fe-Ni, Fe-Co, Fe-Mn, Fe-Si, Fe-Ni-Cr, Fe-Ni-Co, Cr-C, Si-C, Ir-Os, Os-Ir, Os-Ir-Ru, Fe-Pt, and silicate and sulfides. |
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| Keywords: | ophiolite diamond Tibet |
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