福建行洛坑大型钨矿的地质特征、成矿时代及其找矿意义  

GEOLOGICAL CHARACTERISTICS AND METALLOGENIC EPOCH OF THE XINGLUOKENG TUNGSTEN DEPOSIT,FUJIAN PROVINCE

作　　者：张家菁[1] 陈郑辉[2] 王登红[2] 陈振宇[2] 刘善宝[1] 王成辉[1] 

机构地区：[1]中国地质科学院研究生部 [2]中国地质科学院矿产资源研究所,北京100037

出　　处：《大地构造与成矿学》2008年第1期92-97,共6页Geotectonica et Metallogenia

基　　金：国家科技支撑计划“南岭地区有色-贵重金属成矿潜力及综合探测技术示范研究”课题(2006BAB01B03);中国地质调查局“中国成矿体系综合研究”项目(1212010634002);“我国重要矿产和区域成矿规律研究”(1212010733803)项目等的资助

摘　　要：行洛坑钨矿是目前福建最大也是武夷山成矿带最大的钨矿,已知储量主要分布于岩体内部,宜归属于斑岩型钨矿范畴。本文通过Re-Os法和Rb-Sr等时线法测定花岗岩体中辉钼矿的Re-Os等时线年龄为156.3±4.8Ma,石英脉中流体包裹体的Rb-Sr等时线年龄为147.5±2.9Ma,表明成矿作用与岩浆岩的形成基本同步,并延续了大约10Ma。因此,行洛坑钨矿虽然属于斑岩型钨钼矿但岩体以外的空间也可能找到石英脉钨矿,而整个武夷山成矿带中生代持续而复杂的成矿历史预示了其良好的找矿前景。The Xingluokeng tungsten deposit is the largest both in Fujian Province and in the Wuyishan metallogenic belt. Most of ore minerals are hosted in the Yanshanian granitic porphyry rocks. This deposit can be classified into porphyry-type tungsten deposit. Molybdenites from the tungsten ores were used for Re-Os isotope dating, the isochronal age of 156.3±4.8Ma well constrained the metallogenic age of the tungsten deposit, while quartz samples have been selected from ore-bearing veins for Rb-Sr isotopic dating that yielded an isochron age of 147.5±2.9 Ma. The former is similar to the diagenetic age of 157Ma, and the later shows an evolutional history （about 10Ma） of mineralization. This result suggests that even though the porphyry W （and other metals） deposits are important, other type deposits （ such as the vein-type tungsten deposits in southern Jiangxi） are also possible to be found in the Wuyishan metallogenic belt.

关 键 词：行洛坑钨矿 RE-OS年龄 RB-SR年龄 福建 武夷山成矿带 

分 类 号：P611[天文地球—矿床学]