粤北始兴地区石英脉型钨矿成矿时代的确定及其地质意义  

DETERMINATION OF MINERALIZATION EPOCH OF QUARTZ-VEIN TYPE TUNGSTEN DEPOSITS IN SHIXING REGION,NORTHERN GUANGDONG AND ITS GEOLOGICAL SIGNIFICANCE

作　　者：付建明[1] 李华芹[1] 屈文俊[2] 马丽艳[1] 杨晓君[1] 魏君奇[1] 刘国庆[1] 

机构地区：[1]宜昌地质矿产研究所,湖北宜昌443003 [2]国家地质实验测试中心,北京100037

出　　处：《大地构造与成矿学》2008年第1期57-62,共6页Geotectonica et Metallogenia

基　　金：中国地质调查局项目(1212010533307和12120106339-01-4)资助

摘　　要：粤北始兴地区钨矿的主体为石英脉型。通过对含矿石英脉中辉钼矿Re-Os同位素测定,获得等时线年龄及模式年龄的加权平均值分别为:师姑山钨铋矿(154.2±2.7)Ma(MSWD=0.29)和(154.0±2.0)Ma(MSWD=0.047);石人嶂钨矿(159.1±2.2)Ma(MSWD=3.9)和(157.6±1.6)Ma(MSWD=0.62)。结果表明它们为南岭地区中生代大规模成岩成矿作用高峰期的产物。这为进一步研究区域成矿规律,指导区域找矿提供了重要同位素年代学依据。The tungsten deposits in the Shixing region, northern Guangdong Province, are composed mainly of quartz-vein type ones. Based on the precise Re-Os dating of the molybdenites from the ore-hosted quartz vein, we obtained the ore-forming ages of 154.2±2.7 Ma（ MSWD = 0.29 ） for the Shigushan tungsten-bismuth deposit and 159.1±2.2Ma（ MSWD = 3.9）for the Shirenzhang tungsten deposit. It suggested that the deposits were the products of the peak time of Mesozoic large-scale mineralization in the Nanling region, South China. Our new data provide an important isotope chronological evidence for further study of the regional mineralization regularities and the guidance of regional prospecting.

关 键 词：石英脉型钨矿床 辉钼矿Re Os定年 始兴 粤北 

分 类 号：P611[天文地球—矿床学]