| 皖南东源钨钼矿成矿流体特征和成矿物质来源 |
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| 引用本文： | 杜玉雕,余心起,刘家军,周 翔,傅建真.皖南东源钨钼矿成矿流体特征和成矿物质来源[J].中国地质,2011,38(5):1334-1346. |
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| 作者姓名： | 杜玉雕 余心起 刘家军 周 翔 傅建真 |
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| 作者单位： | 1. 中国地质大学地质过程与矿产资源国家重点实验室,北京100083;中国地质大学地球科学与资源学院,北京100083
2. 安徽省地质矿产勘查局332地质队,安徽黄山,245000 |
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| 基金项目： | 安徽省国土资源厅公益性地质(科研)工作项目(2009-20)资助 |
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| 摘 要： | 皖南东源钨钼矿位于安徽省祁门东源境内,是该地区目前已知规模最大的钨钼矿床。钨钼矿体主要产于花岗闪长斑岩体内及其接触带附近,以细脉浸染状和浸染状矿化类型为主。流体包裹体地球化学研究表明,气相成分主要为H2O和CO2,含少量C2H4、N2、CH4等,液相成分以Ca2+、Na+、SO24-、Cl-为主,K+、F-次之,并含少量Mg2+、NO3-、Br-。矿床氢、氧、硫、铅稳定同位素组成研究表明,流体包裹体中水的δ18O水的含量范围为-0.498‰～3.102‰,δD水的含量范围为-85‰～-66‰,成矿流体主要为岩浆水与大气降水的混合物;黄铁矿的δ34SV-CDT值介于2.6‰～5.8‰,硫可能是由成矿流体从东源花岗闪长岩体中淋滤而来;铅同位素变化范围小,其来源具有明显的混合特征。成矿流体在成矿过程中,经历了不混溶或沸腾作用及其与被加热的大气降水的混合作用,改变了成矿流体系统的物理化学条件,引起体系含W和Mo络合物的不稳定,从而造成大量的成矿物质析出、沉淀,富集成矿。
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| 关 键 词： | 东源钨钼矿床 流体包裹体 不混溶 同位素 皖南 |
Characteristics of ore-forming fluids and sources of ore-forming materials in the Dongyuan W-Mo deposit, southern Anhui Province |
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| DU Yu-diao,YU Xin-qi,LIU Jia-jun,ZHOU Xiang,FU Jian-zhen.Characteristics of ore-forming fluids and sources of ore-forming materials in the Dongyuan W-Mo deposit, southern Anhui Province[J].Chinese Geology,2011,38(5):1334-1346. |
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| Authors: | DU Yu-diao YU Xin-qi LIU Jia-jun ZHOU Xiang FU Jian-zhen |
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| Institution: | DU Yu-diao1,2,YU Xin-qi1,LIU Jia-jun1,ZHOU Xiang1,FU Jian-zhen3(1.State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China,2.School of Earth Sciences and Resources,3.No.332 Geological Party,Anhui Bureau of Geology and Mineral Resources,Huangshan 245000,Anhui,China) |
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| Abstract: | Lying in Qimen City of Anhui Province,the Dongyuan W-Mo deposit is the largest W-Mo deposit so far discovered in this region.Its major W-Mo ore bodies are mainly hosted in granodiorite porphyry and near the contact zone,and mineralization is mainly of veinlet dissemination and dissemination types.Geochemical study of fluid inclusions shows that gas components of fluid inclusions are mainly H2O and CO2,with minor amounts of such components as C2H4,N2 and CH4.Liquid components of fluid inclusions are mainly C... |
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| Keywords: | Dongyuan W-Mo deposit fluid inclusions immiscibility isotope southern Anhui Province |
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