西藏东巧西岩体铬尖晶石地球化学特征及其指示意义  

Geochemical characteristics and their denotative meaning of picotite from Dongqiao west rock mass in Tibet

作　　者：郑凡石[1] 钟康惠[1] 聂国永[1] 蔺吉庆[1] 陆彪[1] 

机构地区：[1]成都理工大学地球科学学院,四川成都610059

出　　处：《四川有色金属》2013年第1期47-50,62,共5页Sichuan Nonferrous Metals

基　　金：西藏自治区矿产资源潜力评价项目(1212010813025)

摘　　要：东巧西岩体位于藏北蛇绿岩带的中段,是藏北湖区中较大的移置岩体之一。铬尖晶石作为副矿物产于超基性岩中。因其化学成分受控于形成时地质条件,且铬尖晶石在变形、变质条件下为较稳定矿物。本文以地质事实为基础,研究铬尖晶石成分变化,用以探讨成岩环境、岩体含矿性等问题。Dongqiao western rockrnass located in middle of northern Tibet ophiohte, it is one ot the olgger dislocation rock mass. Picotite as the auxiliary mineral originate in uhrabasic rocks, chemical components controlled by the geological conditions of forming time. And picotite in the condition of transformation is steady mineral, this paper on the basis of the geology fact ,research on the ophiolite compositional variation, to discuss the diagenesis condition and rock mass ore-bearing potential etc.

关 键 词：西藏 铬尖晶石 部分熔融 含矿性 

分 类 号：P618[天文地球—矿床学]