津巴布韦舒鲁圭透镜状铬铁矿成因  

Genesis of lenticular Cr deposits in Selugwe,Zimbabwe

作　　者：王铁军[1] 刘晓阳[2] 林锐华 杨秀峰[1] 

机构地区：[1]中钢集团天津地质研究院,天津300181 [2]中国地质调查局天津地质调查中心,天津300171

出　　处：《地质找矿论丛》2012年第4期485-490,共6页Contributions to Geology and Mineral Resources Research

摘　　要：通过对津巴布韦舒鲁圭透镜状铬铁矿地质背景、构造控矿特征、矿体赋存空间特征、蚀变岩组合、矿石结构构造特征的总结分析,提出舒鲁圭铬铁矿流体成矿假说,认为太古宙超基性杂岩侵入的同时,富含铬合金氢化物的H2-CH4超临界流体沿构造带侵入到地壳浅部,并与构造带内水混合,水与铬合金氢化物发生化学反应,产生的铬尖晶石沉淀在构造带内,形成透镜状铬铁矿体。Based on geological background, structure-control characteristics, spatial location, altered rock assemblage, ore structure and texture of Cr deposits in Selugwe area a hypothesis is put forward that the deposits are formed by supercritical fluid of H2-CH4. During intrusion of Archean ultra-basic complex the H2-CH4-rich supercritical fluid moved to shallow crust along structural zone and incorporated with water and Cr-spinel is formed from reaction of H2-CH4 with water as the lenticular Cr deposits.

关 键 词：透镜状铬铁矿 铬尖晶石 铬合金氢化物 塞巴奎系 布拉瓦约系 舒鲁圭 津巴布韦 

分 类 号：P611[天文地球—矿床学] P618.33[天文地球—地质学]