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| 西秦岭铧厂沟金矿床流体包裹体特征研究及矿床成因 | |
| 引用本文： | 周振菊,秦艳,林振文,王立新,汪志强.西秦岭铧厂沟金矿床流体包裹体特征研究及矿床成因[J].岩石学报,2011,27(5):1311-1326. |
| 作者姓名： | 周振菊 秦艳 林振文 王立新 汪志强 |
| 作者单位： | 1. 中国科学院广州地球化学研究所,矿物学与成矿学重点实验室,广州,510640;中国科学院研究生院,北京,100049 2. 中国科学院广州地球化学研究所,矿物学与成矿学重点实验室,广州,510640 3. 陕西省略阳县铧厂沟金矿,略阳,724312 4. 西北有色地质勘查局711总队,汉中,723000 |
| 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)和全国危机矿山接替资源找矿项目(20089934)联合资助. |
| 摘 要： | 铧厂沟金矿位于西秦岭勉略缝合带南侧,其产出受韧脆性剪切带控制,赋矿围岩为泥盆系细碧岩、凝灰质绢云千枚岩和灰岩。根据脉体穿切关系和矿物交代关系,可以将铧厂沟金矿分为早、中、晚3个成矿阶段。在铧厂沟金矿的石英中发育了CO2-H2O型、纯CO2型、H2O溶液型和含子矿物型四种类型流体包裹体。早期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±H2S,均一温度集中在320~360℃,盐度为0.43%~5.14% NaCleqv;中阶段为主成矿阶段,该阶段石英中包含了所有四种类型的包裹体,其中H2O溶液型包裹体占了大多数,CO2-H2O和水溶液包裹体均一温度集中在240~320℃,盐度为0.43%~11.19% 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(118~228℃)和盐度(0.18%~6.59% NaCleqv)。根据CO2-H2O型包裹体计算主成矿阶段压力为70~195MPa,成矿深度为5~7km。总体而言,铧厂沟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的矿质的大量沉淀,铧厂金矿为中浅成的造山型矿床。 |
| 关 键 词： | 铧厂沟金矿 流体包裹体 造山型金矿 成矿流体 西秦岭 |
| 收稿时间： | 2010/10/24 0:00:00 |
| 修稿时间： | 2011/3/15 0:00:00 |
Study of fluid inclusion characteristic and genetic type of the Huachanggou gold deposit, West Qinling Orogen. |
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| ZHOU ZhenJu,QIN Yan,LIN ZhenWen,WANG LiXin and WANG ZhiQiang.Study of fluid inclusion characteristic and genetic type of the Huachanggou gold deposit, West Qinling Orogen.[J].Acta Petrologica Sinica,2011,27(5):1311-1326. | |
| Authors: | ZHOU ZhenJu QIN Yan LIN ZhenWen WANG LiXin and WANG ZhiQiang |
| Institution: | Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;Huachanggou Gold Mine of Lueyang County in Shaanxi Province, Lueyang 724312, China;711 Party of Northwestern Bureau of Non-Ferrous Metals Geological Prospecting and Exploration,Hanzhong 723000,China |
| Abstract: | The Huachanggou gold deposit,Shaanxi Province,is located in the southern edge of Mianlue suture zone of the West Qinling Orogen.It is controlled by a ductile-brittle shear zone and hosted in the Devonian spilite,tuffaceous sericitized phyllite and limestone.The crosscutting relationships and mineral replacement suggest that the ore forming process includes the early,middle and late stages.In the quartz of Huachanggou gold deposit,four types of fluid inclusions(FIs)are identified as CO2-H2O,pure CO2,H2O-solu... |
| Keywords: | Huachanggou gold deposit Fluid inclusion Orogenic gold deposit Ore-fluid West Qinling Orogen |
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