现代地质2011，Vol.25Issue(2)：228-235,8.
湖南瑶岗仙钨多金属矿床辉钼矿Re-Os同位素定年和硫同位素分析及其地质意义
Re-Os Dating of Molybdenite and Sulfur Isotope Analysis of the Yaogangxian Tungsten Polymetallic Deposits in Hunan Province and Their Geological Significance
摘要
Abstract
The Yaogangxian tungsten polymetallic ore-field consisting of Yaogangxian tungsten deposit, Qingshanli lead-zinc deposit and Heshangtan scheelite deposit, is located in the central part of the Nanling metallogenic belt. Detailed field geological investigation shows that three deposits are rather close in space, occurrence of ore body and ore-control factors. Re-Os dating of molybdenite was performed to determine the age of mineralization of Yaogangxian tungsten deposit and Heshangtan scheelite deposit. Re-Os isochron ages of molybdenite from the Yaogangxian tungsten deposit and the Heshangtan scheelite deposit were obtained by (158 ± 1.2)Ma ( n = 7, MSWD = 1.3 ) and ( 160 ± 3.3 ) Ma ( n = 6, MSWD= 2.7 ), respectively. It indicates that two kinds of tungsten mineralization were formed in the same period, and also highly anastomosed with Yaogangxian composite pluton in time and place, and are part of the second large-scale mineralization in Nanling. The δ34S values of ore mineral ( pyrite, sphalerite, molybdenite) from three deposits show variations from - 1.8‰ to + 1.4‰.The characteristics of spatiality, chronology and sulfur isotopes, together suggest these three deposits are different parts of the same magmatic ore-formation.关键词
钨多金属矿田/辉钼矿Re-Os等时线年龄/硫同位素组成/地质意义/湖南瑶岗仙Key words
tungsten polymetallic ore-field/ molybdenite Re-Os isochron age/ sulfur isotopic composition/ geological significance/ Yaogangxian in Hunan Province分类
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李顺庭,王京彬,祝新友,李超..湖南瑶岗仙钨多金属矿床辉钼矿Re-Os同位素定年和硫同位素分析及其地质意义[J].现代地质,2011,25(2):228-235,8.基金项目
中国地质调查局全国危机矿山接替资源找矿项目(20089927). （20089927）
