西藏罗布莎铬铁矿体围岩方辉橄榄岩中的异常矿物

杨经绥,张仲明,李天福,李兆丽,任玉峰,徐向珍,巴登珠,白文吉,方青松,陈松永,戎合. 西藏罗布莎铬铁矿体围岩方辉橄榄岩中的异常矿物[J]. 岩石学报, 2008, 24(7).
引用本文: 杨经绥,张仲明,李天福,李兆丽,任玉峰,徐向珍,巴登珠,白文吉,方青松,陈松永,戎合. 西藏罗布莎铬铁矿体围岩方辉橄榄岩中的异常矿物[J]. 岩石学报, 2008, 24(7).
YANG JingSui,ZHANG ZhongMing,LI TianFu,LI ZhaoLi,REN XuFeng,XU XiangZhen,BA DengZhu,BAI WenJi,FENG QingSong,CHEN SongYong,RONG He. Unusual minerals from harzburgite, the host rock of the Luobusa chromite deposit, Tibet[J]. Acta Petrologica Sinica, 2008, 24(7).
Citation: YANG JingSui,ZHANG ZhongMing,LI TianFu,LI ZhaoLi,REN XuFeng,XU XiangZhen,BA DengZhu,BAI WenJi,FENG QingSong,CHEN SongYong,RONG He. Unusual minerals from harzburgite, the host rock of the Luobusa chromite deposit, Tibet[J]. Acta Petrologica Sinica, 2008, 24(7).

西藏罗布莎铬铁矿体围岩方辉橄榄岩中的异常矿物

  • 基金项目:

    中国地质调查局资助项目,国家自然科学基金

Unusual minerals from harzburgite, the host rock of the Luobusa chromite deposit, Tibet

  • 近些年,我们在西藏罗布莎蛇绿岩型铬铁矿中发现金刚石和柯石英等超高压矿物和异常地幔矿物,成果多次在美国AGU会议上做特邀报告,发表在2007年(Geology)和国内期刊上,并有4个新矿物获得国际新矿物委员会批准.这些成果在国内外引起广泛关注,也引发出一系列新的科学问题,例如,金刚石的赋存状态,物质来源和成因?与其伴随的铬铁矿的成因,与金刚石的关系?两者形成的地质背景、物理化学环境、保存和运移的规律、机制,等等.为了探讨这些问题,我们认为除了研究罗布莎铬铁矿之外,还应该开展铬铁矿的围岩地幔橄榄岩的研究,看看它们中都有什么矿物,与铬铁矿中的矿物究竟存在什么异同以及两者之间的成因联系?为此,我们从西藏罗布莎铬铁矿31号矿体不同高度取回两个各自为1吨重的方辉橄榄岩围岩样品,开展人工重砂矿物的分选.通过矿物成分、激光拉曼和X射线衍射光谱的研究,从中识别出金刚石等50余种矿物.经初步对,认为铬铁矿围岩方辉橄榄岩中发现的矿物组合与铬铁矿中相似,表明两者存在成因上的联系,并可能共同经历了从深部到浅部的地质过程.
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刊出日期:  2008-07-31

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