豆荚状铬铁矿中微米级新矿物的发现及指示意义  

Discovery and significance of micro scale new minerals in podiform chromitites

作　　者：闫金禹 熊发挥[1,2] 徐向珍 杨经绥[1,2,3] YAN Jinyu;XIONG Fahui;XU Xiangzhen;YANG Jingsui(Center for Advanced Research on the Mantle(CARMA),Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China;Guangdong Laboratory of Southern Marine Science and Engineering(Guangzhou),Guangzhou,Guangdong 511458,China;School of Earth Sciences and Engineering,Nanjing University,Nanjing,Jiangsu 210023,China)

机构地区：[1]中国地质科学院地质研究所自然资源部深地动力学重点实验室,地幔研究中心,北京100037 [2]南方海洋科学与工程广东省实验室(广州),广东广州511458 [3]南京大学地球科学与工程学院,江苏南京210023

出　　处：《地质学报》2023年第11期3802-3824,共23页Acta Geologica Sinica

基　　金：第二次青藏高原科学考察研究专项(编号2019QZKK0801);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92062215,42172069,41720104009);中国地质调查局项目(编号DD20230340,DD20221630);自然资源部深地动力学重点实验室自主研究课题(编号J1901-28)联合资助的成果。

摘　　要：向着地球深部进军是未来地质科学研究的战略目标之一,微区则是探寻深部地幔元素迁移和物质循环的关键。分子、原子级矿物的分析研究将在解密深部地幔物理化学条件、物质组成中扮演重要角色。蛇绿岩中豆荚状铬铁矿是微米级矿物的主要载体之一。近年来,随着单晶衍射仪、微区衍射和透射电镜等实验技术的发展和应用,在豆荚状铬铁矿中发现了一系列微米级矿物,为揭示地幔物质组成和演化历史提供重要信息。铬铁矿中发现新矿物的矿床包括中国西藏的罗布莎铬铁矿矿床和希腊中部Othrys矿床。其中,罗布莎铬铁矿矿床中发现包括罗布莎矿、林芝矿、那曲矿、藏布矿、雅鲁矿、曲松矿、自然钛、青松矿、巴登珠矿、志琴矿、经绥矿、康金拉矿及文吉矿在内的13种新矿物;Othrys蛇绿岩的Agios Stefanos矿床发现的新矿物有arsenotu?ekite、eliopoulosite、tsikourasite和grammatikopoulosite。这些新矿物以过渡族元素(Fe、Cr、Ni、Mo、V等)、钛的硅化物、碳化物、镍的磷化物等自然元素及金属化合物为主。它们多以矿物发现地或为地学研究做过卓越贡献的科学家名字命名。微米级矿物的发现拓展人类对地幔矿物的晶体结构和晶体化学的认知,为进一步解释深部地幔与还原性流体的高温反应及还原环境下矿物的蚀变作用奠定了基础。The earth's microscopic minerals,even molecular and atomic minerals,play an important role in revealing the history of the earth's development and the evolution of the mantle crust.As an important carrier of micro-geological action mechanism,micro scale minerals can solve the problem of migration and circulation of crust and mantle materials.In order to focus on this view,we need to turn our attention to one of the carriers of these micro-sized minerals:podiform chromitite.Podiform chromitites are the main source of chromium and rare mineral species in China.In recent years,with the application of experimental techniques such as single crystal diffractometer,micro-area and micro-diffraction and the progress of computer science and technology,many new achievements have been made in the mineralogical research of podiform chromitites.Deposits where micro scale minerals have been discovered include the Luobusa chromite deposit in Tibet,China,the Othrys deposit in central Greece,and the Loma Peguera deposit in the Dominican Republic.Thirteen micro scale minerals including luobusaite,linzhiite,naquite,zangboite,yarlongite,qusongite,titanium,qingsongite,badengzhuite,zhiqinite,wenjiite,kangjinlaite and jingsuite have been discovered in the Luobusa chromitite,and four micro scale minerals such as arsenotuekite,eliopoulosite,tsikourasite,grammatikopoulosite have been discovered in the Othrys ophiolite.They have been formally approved as new minerals by the Committee on New Minerals,Nomenclature and Classification of the International Mineralogical Society(IMA-CNMNC).The new minerals are named according to the place names of mineral discovery areas and their adjacent areas or scientists who have made outstanding contributions to geoscience research,and are mainly composed of transition elements(Fe,Cr,Ni,Mo,V,etc.),titanium silicide,carbide,nickel phosphide and natural elements.Through the study of the mineral chemical composition and crystal structure of these micronano minerals,and with the help of Focused Ion Beam(FIB)tec

关 键 词：微米级矿物 晶体结构 铬铁矿 晶体化学 罗布莎 

分 类 号：P618.31[天文地球—矿床学] P618.33[天文地球—地质学]