查汗萨拉锑、银矿带容矿地层时代  

Timing of the host strata of Chahasala Sb-Agore belt

作　　者：胡世玲[1] 满发胜[2] 倪守斌[2] 王兆荣[2] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中国科学技术大学地球和空间科学系,合肥230026

出　　处：《岩石学报》2002年第4期593-600,共8页Acta Petrologica Sinica

基　　金：国家"九五"重点科技攻关 (新疆 30 50 4 0 4 )项目资助

摘　　要：南天山中西段分布一条长约 80 0公里的含碳碎屑岩建造 (通称黑色岩系 ) ,其中赋存汞、锑、金、银等中低温热液矿床 ,系统研究表明 :南天山中西段燕山期仍是重要的内生金属成矿时期。为了解决该区容矿地层的时代 ,对采自查汗萨拉南北矿带 ,萨瓦亚尔顿 ,古勒克达坂和卡拉脚古牙五个地区样品进行了铷 -锶年龄测定 ,得到的结果分别是 :2 83± 2 1Ma,2 89±2 0 Ma,2 88± 18Ma,2 78± 2 3 Ma和 3 80± 3 2 Ma,除卡拉脚古牙样品为中泥盆统外 ,其它皆为晚石炭世 -早二叠世 ,测年数据与新发现的化石鉴定成果一致 ,证明容矿岩系的时代为晚古生代。这一研究进展 ,将为进一步深入研究黑色岩系的形成环境和含矿性提供基础资料 ,也为该区的地质研究。In the central and western sections of south Tianshan Mountain, a belt of carbon-bearing detrital rock formation, generally known as black rock series, riched in Hg, Sb, Au and Ag meso-epithermal ore deposits is extended about 800km. The research indicated that the important time of endogenetic metallization of central and western sections of. South Tianshan Mountain is Yanshanian epoch. Dating for stratum, some samples from host strata of Chahansala south and north ore belt, Sawayalrdun, Gulake and Kalajiaoguya have been determined by Rb-Sr method with the result of 283+/-21Ma, 289+/-200Ma, 288+/-18Ma, 278+/-23Ma and 380+/-32Ma, respectively. All of them belong to late Carboniferous-early Permian, except one Middle Devonian sample from Kalajinoguya. These data show no difference with the result obtained from newly discovered fossils. This. means that the timing of host strata as A whole is late Paleozoic. The present study provides some basic data for the further research on the forming environment and potentiality of the black rock series and on geology, tectonic evolution and metallogenic law of the area.

关 键 词：RB-SR定年 容矿地层 成矿规律 锑矿床 银矿床 容矿岩系 

分 类 号：P618.66[天文地球—矿床学] P618.52[天文地球—地质学]