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| 小秦岭文峪金矿床流体包裹体研究及矿床成因 | |
| 引用本文： | 周振菊,蒋少涌,秦艳,赵海香,胡春杰.小秦岭文峪金矿床流体包裹体研究及矿床成因[J].岩石学报,2011,27(12):3787-3799. |
| 作者姓名： | 周振菊 蒋少涌 秦艳 赵海香 胡春杰 |
| 作者单位： | 1. 中国科学院矿物学与成矿学重点实验室,广州地球化学研究所,广州510640;南京大学地球科学系,内生金属矿床成矿机制研究国家重点实验室,南京210093;中国科学院研究生院,北京100049 2. 南京大学地球科学系,内生金属矿床成矿机制研究国家重点实验室,南京210093 3. 中国科学院矿物学与成矿学重点实验室,广州地球化学研究所,广州510640 4. 中国科学院矿物学与成矿学重点实验室,广州地球化学研究所,广州510640;中国科学院研究生院,北京100049 |
| 基金项目： | 本文受国家973计划项目(2006CB403508)、国家自然科学基金项目(40703010、40730421、40425006)以及全国危机矿山接替资源找矿项目(20089934)联合资助. |
| 摘 要： | 文峪金矿位于小秦岭矿田南部,其产出受脆-韧性剪切带控制,赋矿围岩为太华群变质杂岩.根据脉体穿切关系和矿物交代关系,可以将文峪金矿流体成矿过程分为早、中、晚三个阶段,其热液石英中发育CO2-H2O型、纯CO2型和H2O溶液型三种类型流体包裹体.平阶段石英中原生包裹体主要是CO2-H2O型和纯CO2型,其成分为CO2+H2O±N2±CH4,均一温度集中在290～330℃,盐度为1.02％～9.59％ NaCleqv;中阶段为主成矿阶段,该阶段石英中包含了所有3种类型的包裹体,其中以CO2-H2O型包裹体为主,获得CO2-H2O和水溶液包裹体均一温度集中在250～290℃,盐度为0.02％～12.81％NaCleqv；晚阶段石英仅发育水溶液型包裹体,具有较低的均一温度(114～239℃)和盐度(4.18％～8.95％ NaCleqv).根据CO2-H2O型包裹体计算早、中阶段压力分别为130 ～ 178MPa和85 ～ 150MPa,对应的成矿深度分别为4.7～6.5km和3.1～5.5km.总体而言,文峪金矿的初始流体具有中高温、富CO2、低盐度的变质流体特征,晚成矿阶段流体演化为低温、低盐度水溶液流体,流体的不混溶导致了主成矿期矿质的大量沉淀,文峪金矿为中浅成的造山型矿床. |
| 关 键 词： | 流体包裹体 造山型金矿 成矿流体 文峪金矿 小秦岭 |
| 收稿时间： | 2011/11/4 0:00:00 |
| 修稿时间： | 2011/11/10 0:00:00 |
Fluid inclusion characteristics and ore genesis of the Wenyu gold deposit, Xiaoqinling gold belt |
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| ZHOU ZhenJu,JIANG ShaoYong,QIN Yan,ZHAO HaiXiang and HU ChunJie.Fluid inclusion characteristics and ore genesis of the Wenyu gold deposit, Xiaoqinling gold belt[J].Acta Petrologica Sinica,2011,27(12):3787-3799. | |
| Authors: | ZHOU ZhenJu JIANG ShaoYong QIN Yan ZHAO HaiXiang and HU ChunJie |
| Institution: | Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China;State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210093, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China;State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210093, China;Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China;State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210093, China;Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
| Abstract: | The Wenyu gold deposit, Henan Province, is located in the southern part of the Xiaoqinling gold belt. It is controlled by a brittle-ductile shear zone and hosted in the Taihua Group metamorphic complex. The crosscutting relationships and mineral assemblages suggest that the ore forming process includes the early, middle and late stages. Three types of fluid inclusions (FIs) in the quartz of Wenyu gold deposit are identified as CO2-H2O, pure CO2, and H2O-solution. The early-stage quartz contains primary pure... |
| Keywords: | Fluid inclusion Orogenic gold deposit Ore-fluid Wenyu gold deposit Xiaoqinling |
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