超大型锑矿床定位机制剖析——以锡矿山锑矿床为例  

Locating Mechanism of Superlarge Antimony Deposit─Sikuangshan Antimony Deposit Example

作　　者：金景福[1] 

机构地区：[1]成都理工大学,四川成都610059

出　　处：《矿物岩石地球化学通报》2002年第3期145-151,共7页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：原地质矿产部科技攻关项目 (地科定 96 13)资助

摘　　要：从地质时期、地质构造环境和物理化学条件出发 ,以锡矿山锑矿床为例初步剖析了超大型锑矿床在时间和空间上的定位机制。研究表明 ,锑成矿定位时间为 6 6 .4～ 5 1.6Ma ,相当于燕山晚期 喜马拉雅早期 ;锑矿床多赋存于上泥盆统佘田桥组陆源细碎屑岩 碳酸盐岩建造中 ,特别是碳酸盐岩的中上部位 ,主要受区域性深大断裂与次级复式短轴背斜的联合控制 ,并与碳酸盐岩的层间构造有密切的空间关系 ;锑成矿定位的温度、压力、pH及fO2 都偏低 ,分别为 2 0 0～ 10 0℃ ,30～ 2 0MPa,6 .5～ 5 ,10 - 3 7～ 10 - 4 3 Pa。Taking the Xikuangshan antimony deposit for example,the paper has analysed the locating mechanism of superlarge antimony deposit spatially and temporally,mainly from the geological period, the geological structural setting and the physico-chemical condition.The study has showed that the temporal position of antimony mineralization is for 66.4～51.6?Ma, corresponding to Late Yanshanian-Early Himalyan, and antimony deposit mainly occurs in the formation of terrigenous microclastic rock-carbonate rock(Setianqiao Group of Upper Devonian), especially in the middle-upper part of carbonate rock. It has been mostly controlled by the combination of regional deep-fault and secondary multiple brachyanticline, and has close spatial relation to interlayer structure of carbonate rock. The temperature, pressure, pH and f O 2 in the location of antimony deposit are all lower,respectively for 200～100℃, 30～20?Pa,6.5～5, 10 -37～10 -43?MPa.

关 键 词：定位机制 物理化学条件 地质构造环境 地质时期 锑矿床 温度 压力 

分 类 号：P618.66[天文地球—矿床学]