个旧锡矿区层状矽卡岩的成因探讨  

Research on Genesis of Bedded Skarn in Gejiu

作　　者：马毅[1] 黎应书[1] 秦德先[1] 燕永锋[1] 洪托[1] 

机构地区：[1]昆明理工大学矿产地质研究所

出　　处：《昆明理工大学学报（理工版）》2006年第4期6-9,共4页Journal of Kunming University of Science and Technology(Natural Science Edition)

基　　金：国家"十五"科技攻关项目(项目编号:2004BA615A-03);云南锡业集团有限责任公司委托项目"个旧锡矿区和外围玄武岩及其成矿研究";云南省自然科学基金项目(项目编号:2003D00008Q)

摘　　要：个旧锡矿分布着大量的层状矽卡岩,顺层产出.该层状矽卡矿成分较为简单,主要由钙铝榴石、钙铁榴石、透辉石、透闪石、绿泥石组成,不具典型的接触交代矽卡岩的特征.研究结果表明,该矽卡岩不是侵人体与碳酸盐岩接触交代的产物,而是沉积-火山沉积岩经后期热液改造形成的层状矽卡岩.There are many bedded skarns occurring as continuous beds are conformable with the wall rocks in which there are no zonings of typical contact metasomatism skarns. There are not characteristics of contact metasomatism skarn in the bedded skarn, which is mainly composed of garnet, diopsite, tremolite and chlorite. It＇s proved that the formation of the bedded skarn is not due to the contact metasomatism between the magmatic intrusion and the carbonate rocks, but the superimposed metasomatism in which the sedimentary rock or submarine volcanic sedimentary rock（basalt） of the Indo- Chinese epoch is reformed by the granitic intrusion of the Yanshanian epoch.

关 键 词：矽卡岩 锡矿床 矿床成因 个旧 

分 类 号：P558.312[天文地球—构造地质学]