安庆夕卡岩型铁铜矿床流体包裹体研究
Fluid inclusions of Anqing skarn-type Fe-Cu deposit, Anhui Province
查看参考文献42篇
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文摘
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对安庆夕卡岩型铁铜矿床中各成矿阶段的夕卡岩矿物、石英和方解石中流体包裹体的岩相学、显微测温及显微激光拉曼光谱分析等的研究结果表明，成矿流体可能为源自深部的岩浆热液，具高温、高盐度和富CH4等还原性挥发分的特征。流体包裹体的均一温度和盐度在夕卡岩期表现为高温（400—570℃）和高盐度（40％～46％NaCl）特征，代表了夕卡岩形成及铁矿化时的流体活动情况；在石英硫化物期表现出中低温（124—396℃），盐度变化较大（6％。38％NaCl）的特征，代表了铜矿化时的流体活动情况。从成矿早期到晚期，流体包裹体的均一温度和盐度都不断降低，且在铜的主成矿阶段曾发生过流体沸腾作用和混合作用。岩浆水在流体成矿过程中占主导地位。 |
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其他语种文摘
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Fluid inclusion study of Anqing skam-type Fe-Cu deposit shows that the ore-forming fluid belongs to NaCl-KCl-H2O solution system, and the primary ore-forming fluid is methane-rich magmatic hydrothermal fluid characterized by high temperature and high salinity. The fluid inclusions of the skarn-stage have high homogeneous temperatures （400 - 570 ℃ ） and high salinities （40% -46% NaCl）, indicating the fluid activities during skam formation and Fe mineralization process. The fluid inclusions of the quartz-sulfide stage have moderate- low homogeneous temperatures （124 - 396 ℃ ）, and large variation of salinities （6% - 38% NaCl）, indicating the fluid activities of Cu mineralization process. The homogeneous temperature and salinity of the fluid inclusions dropped from early to late ore-forming stages, and the boiling and mixing of fluids occurred in the main mineralizing stage of Cu. The magmatic water is dominant in the ore-forming process. |
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来源
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地球化学
,2008,37(1):27-36 【核心库】
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关键词
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夕卡岩
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铁铜矿床
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流体包裹体
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成矿机制
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安庆
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安徽省
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地址
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中国科学院地球化学研究所, 矿床地球化学国家重点实验室, 贵州, 贵阳, 550002
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0379-1726 |
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学科
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地质学 |
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基金
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中国科学院知识创新工程重要方向项目
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文献收藏号
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CSCD:3212395
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