新疆若羌县更新沟多金属矿床地质特征及成因浅析  

Geological Characters and Genesis of Gengxingou Polymetallic Deposit in Ruoqiang County,Xinjiang Province

作　　者：陈志国[1,2] 刘文杰[1] 王自力[1] 

机构地区：[1]天津华北地质勘查局,天津300170 [2]中国地质大学,北京100083

出　　处：《有色矿冶》2015年第6期1-3,7,共4页Non-Ferrous Mining and Metallurgy

摘　　要：更新沟铅锌铜矿位于阿尔金山成矿带红柳构-拉配泉成矿亚带,区内岩浆作用发育,断裂活动强烈,地质构造条件复杂,成矿条件有利。文章通过稳定同位素研究,初步探讨了该矿床的成因。硫同位素特征反应成矿过程中有海水硫酸盐的参与,铅同位素组成含有较高的放射性成因铅,铅同位素模式年龄为负值,表明为异常铅成因,说明该矿床部分铅来源于同生沉积作用。综合研究分析,笔者认为更新沟铅锌铜矿床可能主要形成于加里东期,与海底火山作用有关,在后期造山活动过程中由于花岗质岩浆侵入作用受到热液改造,是一种改造型的块状硫化物矿床。Gengxingou lead-zinc-copper mine is located in Hongliugou-Lapeiquan sub-zone of Arerjin metallogenic belt. In the area the magmatism is well-developed, the tectonic activity is strong, the geo- logic setting is complicated, and the metallogenic condition is favorable. The article investigates the gene- sis of the deposit through researching stable isotope. The sulphur isotope reflects that ocean sulphate par- ticipated in the mineralization process. Lead isotope contains high radioactive lead, and age of lead isotope model is minus, which reflects abnormal lead genesis and suggests that part of the lead is from syndeposi- tion. Combining the above analysis, the author thinks the deposit may be formed mainly in Caledonian, the mineralization is related to submarine volcanism, and was reformed by the hydrothermal liquid from the intrusive of granitic magma during the later orogenic activity. So the deposit is a reformed massive sul- phide deposit.

关 键 词：控矿因素 成因 更新沟铅锌铜矿 若羌县 

分 类 号：P622[天文地球—地质矿产勘探]