小秦岭文峪金矿床流体包裹体研究及矿床成因

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

- 1.
  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
- 2.
  State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210093, China
- 3.
  Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
- 4.
  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
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.

详细信息

通讯作者: 蒋少涌, E-mail: shyjiang@nju.edu.cn

收稿日期: 2011-11-04

修回日期: 2011-11-10

刊出日期: 2011-12-31

Fluid inclusion characteristics and ore genesis of the Wenyu gold deposit, Xiaoqinling gold belt

- 1.
  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
- 2.
  State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210093, China
- 3.
  Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
- 4.
  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

More Information

Corresponding author: JIANG ShaoYong, E-mail: shyjiang@nju.edu.cn

Received Date: 04 November 2011

Revised Date: 10 November 2011

Publish Date: 31 December 2011

摘要

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。早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。
- 流体包裹体 /
- 造山型金矿 /
- 成矿流体 /
- 文峪金矿 /
- 小秦岭
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 CO2 and CO2-H2O with homogenization temperatures clustering at 290~330℃ and the salinity of 1.02%~9.59% NaCleqv. Vapor bubbles are composed of CO2+H2O±N2±CH4. The middle-stage quartz trapped all the three types of FIs. The CO2-H2O FIs is the majority one, and the homogenization temperatures of CO2-H2O and H2O-solution FIs cluster at 250~290℃, and the salinities are 0.02%~12.81% NaCleqv. Fluid inclusions in late-stage quartz are H2O-solution with low homogenization temperatures (114~239℃) and low salinities (4.18%~8.95% NaCleqv). Minimum trapping pressures estimated from CO2-H2O inclusions are 130~178MPa and 85~150MPa for early and middle stages, respectively, corresponding to the ore-forming depth of 4.7~6.5km and 3.1~5.5km, respectively. In general, the ore fluids in the early and middle stages are characterized by meso- to hypothermal, CO2-rich and low salinity, which are considered as the nature of metamorphic fluids, whereas the late-stage fluids are low temperature, low salinity and CO2-poor. Fluid immiscibility caused gold precipitation in the middle-stage. The ore-forming fluid-system of the Wenyu gold deposit is the same to that of the orogenic-type. The Wenyu gold deposit is a mesozonal to epizonal orogenic gold deposit.
- Fluid inclusion /
- Orogenic gold deposit /
- Ore-fluid /
- Wenyu gold deposit /
- Xiaoqinling

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参考文献(25)

[1]	陈衍景, 富士谷. 1992. 豫西金矿成矿规律. 北京: 地震出版社, 1-234
[2]	陈衍景. 2006. 造山型矿床、成矿模式及找矿潜力. 中国地质,33(6): 1181-1196
[3]	陈衍景, 倪培, 范宏瑞, Pirajno F, 赖勇, 苏文超, 张辉. 2007. 不同类型热液金矿床的流体包裹体特征. 岩石学报, 23(9): 2085-2108
[4]	范宏瑞, 谢奕汉, 翟明国, 金成伟. 2003. 豫陕小秦岭脉状金矿床三期流体运移成矿作用. 岩石学报, 19(2): 260-266
[5]	胡正国, 钱壮志, 阎广民. 1994. 小秦岭拆离变质杂岩核构造与金矿. 西安: 陕西科学出版社, 1-238
[6]	蒋少涌, 戴宝章, 姜耀辉, 赵海香, 侯明兰. 2009. 胶东和小秦岭: 两类不同构造环境中的造山型金矿省. 岩石学报, 25(11):2727-2738
[7]	黎世美, 瞿伦全, 苏振邦, 黄建军, 王小生, 岳铮生. 1996. 小秦岭金矿地质和成矿预测. 北京: 地质出版社, 1-250
[8]	李厚民, 叶会寿, 毛景文, 王登红, 陈毓川, 屈文俊, 杜安道. 2007. 小秦岭金(钼)矿床辉钼矿铼锇定年及其地质意义. 矿床地质, 26(4): 417-424
[9]	李诺, 孙亚莉, 李晶, 薛良伟, 李文博. 2008. 小秦岭大湖金钼矿床辉钼矿铼锇同位素年龄及印支期成矿事件. 岩石学报, 24(4): 810-816
[10]	卢焕章, 范宏瑞, 倪培, 欧光习, 沈昆, 张文淮. 2004. 流体包裹体. 北京: 科学出版社, 208-222
[11]	卢欣祥, 尉向东, 董有, 轩慎民. 1999.小秦岭-熊耳山地区金矿时代. 黄金地质, 5(1): 11-15
[12]	栾世伟, 陈尚迪, 曹殿春, 方耀奎. 1991. 小秦岭地区深部金矿化特征及评价. 成都: 成都科技大学出版社, 1-180
[13]	毛景文, 谢桂青, 张作衡, 李晓峰. 2005. 中国北方中生代大规模成矿作用的期次及其地球动力学背景. 岩石学报, 21(1): 169-188
[14]	倪师军, 李朝阳, 张诚, 高荣德, 刘春富. 1994.中基性脉岩对金矿成矿的贡献——以小秦岭金矿区为例. 成都理工学院学报, 21(3):70-78
[15]	倪智勇, 李诺, 管申进, 张辉, 薛良伟. 2008. 河南小秦岭金矿田大湖金-钼矿床流体包裹体特征及矿床成因. 岩石学报, 24(9): 2058-2068
[16]	祁进平, 赖勇, 任康绪, 唐国军. 2006. 小秦岭金矿田成因的锶同位素约束. 岩石学报, 22(10): 2543-2550
[17]	王清晨, 孙枢, 李继亮, 周达, 许靖华, 张国伟. 1989. 秦岭的大地构造演化. 地质科学, 2: 129-142
[18]	王斌. 2009. 小秦岭金矿地球化学特征及矿床成因探讨. 硕士学位论文. 北京:中国地质大学, 1-88
[19]	王义天, 李继亮. 1999. 走滑断层作用的相关构造. 地质科技情报, 18(3): 31-34
[20]	王义天,毛景文,卢欣祥,叶安旺. 2002. 河南小秦岭金矿区Q875脉中深部矿化蚀变岩的⁴⁰Ar-³⁹Ar年龄及其意义. 科学通报, 47(18): 1427-1431
[21]	颜正信, 孙卫志, 薛成. 2007. 小秦岭金矿田中深部构造控矿规律及盲矿预测——以文峪矿区S505矿脉为例. 黄金地质, 28(12): 17-21
[22]	张进江, 郑亚东, 刘树文. 1998. 小秦岭变质核杂岩的构造特征、形成机制及构造演化. 北京: 海洋出版社, 1-120
[23]	张进江, 郑亚东, 刘树文. 2003. 小秦岭金矿田中生代构造演化与矿床形成. 地质科学, 38(1): 74-84
[24]	张祖青, 赖勇, 陈衍景. 2007. 山东玲珑金矿流体包裹体地球化学特征. 岩石学报, 23(9): 2207-2216
[25]	周振菊, 秦艳, 林振文, 王立新, 汪志强. 2011. 西秦岭铧厂沟金矿床流体包裹体研究及矿床成因. 岩石学报, 27(5): 1311-1326

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小秦岭文峪金矿床流体包裹体研究及矿床成因

通讯作者: 蒋少涌, E-mail: shyjiang@nju.edu.cn

Fluid inclusion characteristics and ore genesis of the Wenyu gold deposit, Xiaoqinling gold belt

Corresponding author: JIANG ShaoYong, E-mail: shyjiang@nju.edu.cn

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