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| 新疆西天山莱历斯高尔斑岩型铜钼矿床辉钼矿Re-Os同位素年龄及流体包裹体研究 | |
| 引用本文： | 朱明田,武广,解洪晶,万阈,钟伟,糜梅,刘军.新疆西天山莱历斯高尔斑岩型铜钼矿床辉钼矿Re-Os同位素年龄及流体包裹体研究[J].岩石学报,2010,26(12):3667-3682. |
| 作者姓名： | 朱明田 武广 解洪晶 万阈 钟伟 糜梅 刘军 |
| 作者单位： | 1. 中国科学院广州地球化学研究所成矿动力学重点实验室,广州,510640;中国科学院研究生院,北京100049 2. 中国地质科学院矿产资源研究所,北京,100037;河南省灵宝市金源矿业有限责任公司,灵宝472500 3. 新疆维吾尔自治区地质矿产勘查开发局第七地质大队,乌苏,833000 4. 中国科学院广州地球化学研究所成矿动力学重点实验室,广州,510640 |
| 基金项目： | 本文受国家科技支撑计划项目(2007BAB25B03)、国家973计划项目(2007CB411303、2007CB411308)和国家自然科学基金项目(40772055)联合资助. |
| 摘 要： | 莱历斯高尔斑岩型铜钼矿床位于依连哈比尔尕晚古生代残余洋盆和博罗霍洛早古生代岛弧的结合部位,矿体赋存于花岗闪长斑岩体内及岩体与围岩的接触带中。矿石中5件辉钼矿的Re-Os同位素模式年龄加权平均值为372.5±5.0Ma、等时线年龄为379.9±8.3Ma,表明莱历斯高尔铜钼矿床形成于晚泥盆世。石英中主要发育气液两相水溶液包裹体(W型)、含CO2三相包裹体(C型)及含子矿物多相包裹体(S型),并有少量纯CO2及纯CH4包裹体。成矿早阶段钾长石化花岗闪长斑岩石英斑晶中主要为W型包裹体,均一温度介于300~395℃之间,峰值为358~395℃,盐度介于7.59%~11.22%NaCleqv;主成矿阶段石英细脉中主要发育W型、C型和S型包裹体,并可见少量纯CO2包裹体,均一温度主要介于230~378℃,盐度变化较大,介于0.02%~52.00%NaCleqv;成矿晚阶段石英-方解石脉中仅见气液两相包裹体,均一温度介于118~241℃之间,盐度主要介于1.57%~9.54%NaCleqv。主成矿阶段流体包裹体类型多样、且具有相似的均一温度,指示流体沸腾现象的存在,其流体包裹体捕获温度为210~343℃,压力为17~59MPa,对应的成矿深度介于1.7~2.2km之间。成矿流体不混溶或沸腾作用是金属硫化物沉淀的主要机制。推测莱历斯高尔斑岩型铜钼矿床形成于晚泥盆世依连哈比尔尕残余洋盆向伊犁-中天山微板块之下俯冲的陆缘弧环境。 |
| 关 键 词： | 辉钼矿Re-Os定年 流体包裹体 斑岩型铜钼矿床 莱历斯高尔 西天山 |
| 收稿时间： | 2010/10/1 0:00:00 |
| 修稿时间： | 2010/11/16 0:00:00 |
Re-Os isotopic geochronology and fluid inclusion study of the Lailisigao'er porphyry Cu-Mo deposit in western Tianshan,Xinjiang,NW China |
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| ZHU MingTian,WU Guang,XIE HongJing,WAN Yu,ZHONG Wei,MEI Mei and LIU Jun.Re-Os isotopic geochronology and fluid inclusion study of the Lailisigao'er porphyry Cu-Mo deposit in western Tianshan,Xinjiang,NW China[J].Acta Petrologica Sinica,2010,26(12):3667-3682. | |
| Authors: | ZHU MingTian WU Guang XIE HongJing WAN Yu ZHONG Wei MEI Mei and LIU Jun |
| Institution: | Key Laboratory of Metallogenic Dynamics, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;Graduate School of Chinese Academy of Sciences, Beijing 100049, China;Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Lingbao Jinyuan Mining Limted Liability Company, Henan Province, Lingbao 472500, China;Key Laboratory of Metallogenic Dynamics, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;Graduate School of Chinese Academy of Sciences, Beijing 100049, China;The No. 7 Geological Party, Xinjiang Uigur Autonomous Region Bureau of Geology and Mineral Resources Exploration and Development, Wusu 833000, China;Key Laboratory of Metallogenic Dynamics, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;Key Laboratory of Metallogenic Dynamics, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;Key Laboratory of Metallogenic Dynamics, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;Graduate School of Chinese Academy of Sciences, Beijing 100049, China |
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