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。 |
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. |
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
;
铁铜矿床
;
流体包裹体
;
成矿机制
;
安庆
;
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 |
文献类型
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研究性论文 |
ISSN
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0379-1726 |
学科
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地质学 |
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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