| 蛇绿岩中金刚石和异常矿物的全球记录 |
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| 引用本文： | 刘飞,杨经绥,连东洋,熊发挥,吴魏伟.蛇绿岩中金刚石和异常矿物的全球记录[J].地质学报,2020,94(9):2588-2605. |
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| 作者姓名： | 刘飞 杨经绥 连东洋 熊发挥 吴魏伟 |
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| 作者单位： | 1) 地幔研究中心，深地动力学重点实验室，中国地质科学院地质研究所，北京, 100037;2） 南方海洋科学与工程广东省实验室（广州），广州, 511458;1) 地幔研究中心，深地动力学重点实验室，中国地质科学院地质研究所，北京, 100037;2） 南方海洋科学与工程广东省实验室（广州），广州, 511458;
3） 南京大学地球科学与工程学院, 南京, 210023 |
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| 基金项目： | 本文为南方海洋科学与工程广东省实验室（广州）人才团队引进重大专项（编号GML2019ZD0201）、国家自然科学基金项目(编号41720104009)、中国地质调查局地质调查项目(编号DD20190060)、山东地矿局七队合作项目（编号QDKY202007）以及深地动力学国家重点实验室自主课题(编号J1901- 15)联合资助的成果。 |
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| 摘 要： | 蛇绿岩型金刚石产在地幔橄榄岩和铬铁矿中，是新建立的金刚石产出类型，不同于产在金伯利岩和超高压变质岩中的金刚石。全球已在21个蛇绿岩中发现了该类金刚石，含金刚石的蛇绿岩主要分布在特提斯造山带、乌拉尔- 中亚造山带、日高变质岩带和北美克拉马斯- 阿卡特兰造山带。本文梳理了含金刚石蛇绿岩的全球分布和地质背景以及蛇绿岩中超高压－强还原矿物与其它壳幔矿物组合的特征，讨论了已有的含金刚石铬铁矿和地幔橄榄岩的四种成因机制。金刚石和伴生的超高压－强还原矿物组合产在不同时代的造山带蛇绿岩中，不仅仅揭示了金刚石在蛇绿岩中普遍存在，需要重新思考蛇绿岩和铬铁矿的成因以及它们形成的地质构造背景，还证实了蛇绿岩地幔橄榄岩和铬铁矿是地球深部矿物重要的储存库，为认识地球深部的物质组成和物理化学环境，以及深部物质运移的轨迹和动力学过程等提供了天然样品。
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| 关 键 词： | 蛇绿岩 金刚石 铬铁矿 地幔橄榄岩 地球深部动力学 |
| 收稿时间： | 2020/5/10 0:00:00 |
| 修稿时间： | 2020/6/30 0:00:00 |
Diamonds and other unusual minerals in global ophiolites |
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| LIU Fei,YANG Jingsui,LIAN Dongyang,XIONG Fahui,WU Weiwei.Diamonds and other unusual minerals in global ophiolites[J].Acta Geologica Sinica,2020,94(9):2588-2605. |
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| Authors: | LIU Fei YANG Jingsui LIAN Dongyang XIONG Fahui WU Weiwei |
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| Institution: | 1) CARMA, Key Laboratory of Deep- Earth Dynamics, Institute of Geology,Chinese Academy of Geological Sciences, Beijing 100037, China;2) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou),Guangzhou 511458, China;1) CARMA, Key Laboratory of Deep- Earth Dynamics, Institute of Geology,Chinese Academy of Geological Sciences, Beijing 100037, China;2) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou),Guangzhou 511458, China;3) School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China |
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| Abstract: | Ophiolite- hosted diamond is a new occurrence type named in this century. Twenty- one diamond- bearing ophiolites have been discovered in the Tethyan orogenic belt, Ural- Central Asian orogenic belt, Hidaka metamorphic belt and Klamath- Acatlán orogenic belt. This paper overviews the global distribution and geological features of diamond- bearing peridotites and chromitites, and summarizes the mineral assemblage of microdiamonds and other unusual minerals and crustal minerals, systematically reviews four models for the formation of unusual minerals- bearing podiform chromitite in ophiolites. These diamonds associated with other minerals discovered in ophiolites worldwide not only indicate ubiquitous presence of diamond in global ophiolitic peridotites and chromitites, but also prompt researchers to rethink the genesis of ophiolite and chromitites, and tectonic settings of their formation. It is proved that ophiolitic peridotites and chromitites are critical reservoirs of deep- earth minerals, providing natural samples for understanding material components, physical and chemical environments in deep earth, as well as their travel path and deep dynamic process. |
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| Keywords: | ophiolite diamond chromitite peridotite deep- earth dynamic process |
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