锡矿山超大型锑矿床流体成矿作用及矿床成因  

THE GENESIS AND ORE FORMING FLUID OF THE SUPER LARGE ANTIMONY DEPOSIT OF XIKUANGSHAN,CHINA

作　　者：杨照柱[1] 马东升[1] 解庆林[2] 

机构地区：[1]南京大学地球科学系 [2]桂林工学院资源与环境工程系

出　　处：《地质找矿论丛》1998年第3期49-60,共12页Contributions to Geology and Mineral Resources Research

基　　金：国家自然科学基金

摘　　要：本文对锡矿山流体包裹体、稳定同位素、活动性微量元素、硅化作用及元素存在相态和淋滤率进行了详细研究。揭示了其成矿流体来源于深循环大气降水，是一种中低温、低盐度的弱碱性流体，成矿物质来自于前泥盆系地层，主要是震旦、寒武系地层，区域地层可能经受过大规模的流体运移作用。得出了锡矿山锑矿是由深循环大气降水淋滤基底地层的成矿物质后形成含矿流体沿主断裂向上运移至浅部，由于物理化学条件的改变导致锑沉淀成矿的结论。Studies on fluid inclusions,stable isotopes,trace elements and experiments indicate that the ore forming fluid originated mainly from meteoric water with lower salinity(0 63 8 65wt%)and medium to low temperature(100 300°C).It was weak alkalic and reductive solution.The ore materials were derived from pre Devonian Strata(mainly from the Sinian and,Cambrian strata).The regional strata has been leached by large scale movement of the fluid.Circulating underground water leached ore bearing strata and extracted metallogenic element to form ore bearing fluid.The fluid went up along major fault and was focused on ore forming space.The precipitation of ore minerals was caused by the changes of fluid physicochemical conditions and components of the fluid.

关 键 词：锑矿床 流体 大气降水 成矿作用 矿床成因 

分 类 号：P618.660.5[天文地球—矿床学] P618.660.1[天文地球—地质学]