中酸性岩浆体系成矿流体及微量元素地球化学特征  

Ore-forming fluids related to the intermediate-acid magmatism system and their trace element geochemical characteristics

作　　者：李剑[1] 吕志成[2] 董方浏[2] 

机构地区：[1]中国地质大学地球科学学院 [2]中国地质调查局发展研究中心,北京100037

出　　处：《中国地质》2005年第4期614-624,共11页Geology in China

基　　金：国家自然科学基金项目(40473010);云南省省院省校合作项目(2002ZBBEA058004)资助

摘　　要：从流体成矿作用角度出发,与酸性岩浆体系有关的成矿流体可以分为:酸性岩浆硅酸盐熔融体,岩浆-热液过渡阶段硅酸盐熔融体及其分异的流体,酸性岩浆熔体分异形成的热水成矿溶液。酸性岩浆体系主要提供热源和部分矿质,其提供的热源驱动地下水淋滤、萃取围岩中的成矿物质形成地下水热液成矿流体。变质岩混合岩化形成花岗质岩浆过程中所形成的混合岩化成矿流体。在此基础上。Ore-rotating fluids related to the intermediate-acid magma system can be divided according to fluid mineralization into silicate melt formed in the acid magmatic slage,the mixture of silicate melt and its exsolved hydrothermal fluids during the transitional stage from silicate melt to hydrothermal fluids hydrothermal ore-fluids exsolved from the intermediate-acid melts,and migrnatized ore-forming fluids formed during the formation of granites migmatitization of metamorphic rocks. The acid magma system mainly provides heat and a part of ore sulstances and the heat provided ly it drives sulsurface water to leach the country rocks and extract ore sulstarces from the country rocks, thus forming sulsurface hydrothermal ore rids.On the basis of these studies, detailed trace element geochemical characteristics of the alove-mentioned different ore-forming fluids and their controls on mineralication are discussed.

关 键 词：中酸性岩浆体系 成矿流体 微量元素地球化学 

分 类 号：P588.121[天文地球—岩石学] P595[天文地球—地质学]