投稿时间：2015-02-02
修订日期：2015-12-22
网络发布日期：2016-08-25
中文摘要:通过对修水县莲花芯石英脉型Cu-Mo-W矿床的辉钼矿进行Re-Os同位素测年，获得的w（普Os）为0.0083×10-9~0.1535×10-9，加权的平均年龄为（157.7±2.8）Ma，计算得到辉钼矿Re-Os 等时线年龄为（158.6±2.0）Ma（MSWD=0.63），与加权平均年龄在误差范围内一致，可代表辉钼矿的形成年龄，成矿作用时代晚于赋矿围岩晋宁期黑云母花岗岩的成岩时代。对比区域成岩成矿作用时代，认为该矿床可能与燕山期花岗岩岩浆活动有关，是赣北大规模钨多金属成矿序列演化的产物之一，属于华南中生代第二次大规模成矿作用（165~135 Ma）的产物。
Abstract:The Lianhuaxin Cu-Mo-W deposit is a postmagmatic hydrothermal Cu-Mo-W deposit in nonthwest Jiangxi Province. Re-Os isotopic dating of 5 molybdenite samples from the mineralized quartz veins of the Lianhuaxin deposit yielded a precise isochron age of (158.6±2.0) Ma and a Tukey's Biweight average model age of (157.7±2.8) Ma. The Os content of molybdnite is (0.0083~0.1535)×10-9, and the MSWD is 0.63. The Lianhuaxin molybdenum deposit formed in the mid-late Middle Jurassic period, and the ore-forming age corresponds to the second mineralization stage (165~135 Ma) in the Late Jurassic of South China, consistent with the tungsten-tin mineralization around 160 Ma within the region. The molybdenum mineralization of the Lianhuaxin Cu-Mo-W deposit in north Jiangxi Province occurred in 165~135 Ma,.
keywords:geochemistry Re-Os Isotope dating postmagmatic hydrothermal deposit geological significance Lianhuaxin Cu-Mo-W deposit Xiushui County
文章编号：
中图分类号：P618.41;P618.65;P618.67
文献标志码：
基金项目:本文获得国家重点基础研究发展计划（973计划）项目（编号：2014CB440904）、国家自然科学基金项目（编号：41262002和41403031）、中国地调局项目（编号：科[2014]04-025-024）和国家自然科学基金重点基金项目（编号：U1403292）联合资助
引用文本：
张勇,潘家永,马东升,刘国奇,韦新亚,张雷雷,马崇军,杨春鹏.2016.江西修水县莲花芯Cu-Mo-W矿床的辉钼矿Re-Os年龄及地质意义[J].矿床地质,35(4):867~880ZHANG Yong,PAN JiaYong,MA DongSheng,LIU GuoQi,WEI XinYa,Zhang LeiLei,Ma ChongJun,YANG ChunPeng.2016.Re-Os isotope dating of molybdenite from Lianhuaxin Cu-Mo-W deposit in Xiushui County of Jiangxi Province and its geological significance[J].Mineral Deposits35(4):867~880
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