| 板溪锑矿床流体包裹体研究 |
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| 引用本文： | 唐宇蔷,孔华,吴堑虹,奚小双.板溪锑矿床流体包裹体研究[J].地质找矿论丛,2017,32(3):391-396. |
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| 作者姓名： | 唐宇蔷 孔华 吴堑虹 奚小双 |
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| 作者单位： | 中南大学地球科学与信息物理学院,长沙410083;有色金属成矿预测与地质环境监测教育部重点实验室,长沙410083 |
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| 摘 要： | 板溪锑矿床是湘中锑矿矿集区内的一个中型石英脉型锑矿床,赋存于板溪群五强溪组浅变质碎屑岩中,受NE向的桃江—城步断裂带控制。流体包裹体研究表明,板溪锑矿流体包裹体类型包括富液相水溶液包裹体(Ⅰ型)、富二氧化碳包裹体(Ⅱ型)、纯液相包裹体(Ⅲ型)三类;流体盐度为w(NaCl,eq)=3.4%~7.7%,均一温度为181~331℃,流体的密度为0.78~0.92g/cm~3,矿区成矿流体具有中低温、低盐度、低密度的特点,成矿流体的pH值为5.72,估计成矿压力为49~91 MPa,成矿的地壳深度为5.6~7.8km;均一温度与盐度呈正相关关系,成矿过程中两种流体发生混合作用而成矿。
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| 关 键 词： | 流体包裹体 成矿流体 板溪 湘中地区 |
| 收稿时间： | 2016/7/25 0:00:00 |
Study on fluid inclusions of the Banxi antimony deposit |
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| TANG Yuqiang,KONG Hu,WU Qianhong and XI Xiaoshuang.Study on fluid inclusions of the Banxi antimony deposit[J].Contributions to Geology and Mineral Resources Research,2017,32(3):391-396. |
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| Authors: | TANG Yuqiang KONG Hu WU Qianhong and XI Xiaoshuang |
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| Institution: | School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, Central South University, Changsha 410083, China,School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, Central South University, Changsha 410083, China,School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, Central South University, Changsha 410083, China and School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, Central South University, Changsha 410083, China |
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| Abstract: | The Banxi antimony deposit is a medium-sized quartz vein type deposit occurring in low grade metamorphic clastic rock of Wuqiangxi Formation of the Banxi Group.It is controlled by the TaojiangChengbu fault zone.Fluid inclusion studies indicate that there are three fluid inclusion types:liquid-rich aqueous inclusion (type Ⅰ),CO2-rich fluid inclusion (type Ⅱ) and totally aqueous fluid inclusion (type Ⅲ).The salinities range is from 3.4％ to 7.7％,homogenization temperatures 181℃ to 331 ℃,densities 0.78 g/cms to 0.92 g/cm3 which are characteristic of low temperature,salinity and density.The pH value is 5.72.The ore-forming pressure is estimated about 49 MPa to 91 MPa and depth 5.6～7.8 km in crust.The positive homogenization temperature-low salinity relationship could have resulted from the partial mixing of two originally homogeneous fluids. |
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| Keywords: | fluid inclusions ore forming fluid Banxi central Hunan |
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