闽中地区铅锌矿床辉石成分特征及其成因意义  

Composition characteristics of pyroxenes from Pb-Zn deposits in central Fujian Province and their genetic significance

作　　者：狄永军[1,2] 吴淦国[1,2] 张达[1,2] 余心起[1,2] 林东燕[1,2] 石建基[1,2] 臧文拴[1,2] 张祥信[1,2] 汪群峰[1,2] 

机构地区：[1]中国地质大学地质过程与矿产资源国家重点实验室 [2]中国地质大学岩石圈构造,深部过程及探测技术教育部重点实验室,北京100083

出　　处：《矿床地质》2006年第2期123-134,共12页Mineral Deposits

基　　金：国家自然科学基金(40372050);中国地质调查局工作项目(200310200064)的联合资助

摘　　要：文章在研究闽中地区铅锌矿床蚀变矿物组合的基础上,将辉石矿物的化学成分与典型矽卡岩Pb_Zn矿床的辉石成分进行了对比,认为该区铅锌矿床的辉石与典型矽卡岩中的辉石类似,为透辉石和钙铁辉石,富锰,具有远温端矽卡岩辉石的特征。因此推论本区铅锌矿床大部分类似于矽卡岩型Pb_Zn矿床,少数为受断裂控制的热液脉型矿床,是海底火山喷发沉积形成的初始矿源层经变质作用、燕山期构造_岩浆热液顺层交代、强烈叠加改造或活化并重新定位的矿床。Based on a study of the altered mineral assemblage from Pb-Zn deposits in central Fujian Province, the authors compared their pyroxenes in chemical composition with those from skarn Pb-Zn deposits. It is considered that the pyroxenes from the Pb-Zn deposits in this area are similar to those from skarn Pb-Zn deposits, being manganese-rich diopside and hedenbergite with features of distal skarn pyroxenes. It is thus concluded that the Pb-Zn deposits are mostly akin to skarn Pb-Zn deposits and partly belong to hydrothermal deposits controlled by faults, and that they are ore deposits subjected to metamorphism, replacement, superposition along the bed, strong reformation, or remobilization and deposition by Yanshanian tectono-magmatic hydrothermal fluids.

关 键 词：地质学 辉石 成分特征 构造-岩浆热液矿床 闽中 

分 类 号：P618.42[天文地球—矿床学] P618.43[天文地球—地质学]