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现代地质 ›› 2010, Vol. 24 ›› Issue (4): 767-775.

• 岩石.矿物.矿床 • 上一篇    下一篇

豫西南栾川地区铅锌矿床碳、氧同位素地球化学

段士刚1,薛春纪1,冯启伟1,高炳宇1,刘国印2,燕长海2,宋要武2   

  1. 1.地质过程与矿产资源国家重点实验室,中国地质大学 地球科学与资源学院,北京100083;
    2.河南省地质调查院,河南 郑州450007
  • 出版日期:2010-07-23 发布日期:2010-09-05
  • 通讯作者: 薛春纪,男,教授,博士生导师,1962年出生,矿床学、矿产普产与勘探专业,主要从事矿床地球化学方面的研究。
  • 作者简介:段士刚,男,博士研究生,1983年出生,矿产普查与勘探专业,主要从事矿床地球化学方面的研究。 Email:dsg1102231@163.com。
  • 基金资助:

    地质过程与矿产资源国家重点实验室开放基金项目(GPRM200832);中央高校基本科研业务费专项资金项目(2009PY04);高等学校学科创新引智计划项目(B07011);长江学者和创新团队发展计划项目(IRT0755);国家自然科学基金项目(40772061,40472054)。

Carbon and Oxygen Isotope Compositions of Gangue Carbonates in Pb-Zn Ore Deposits in Luanchuan District, Southwest Henan Province

 DUAN  Shi-Gang1, XUE  Chun-Ji1, FENG  Qi-Wei1, GAO  Bing-Yu1, LIU  Guo-Yin2   

  1. 1.State Key Laboratory of Geological Processes and Mineral Resources,  School of Earth Sciences and Resources, China University of Geosciences,Beijing100083, China; 2.Henan Institute of Geological Survey, Zhengzhou, Henan450007, China
  • Online:2010-07-23 Published:2010-09-05

摘要:

豫西南地区铅锌矿产勘查工作近年来进展迅速,尤其在栾川地区先后发现十余处铅锌银多金属矿脉群、上百条含矿断裂带,铅、锌、银资源前景广阔。对该区铅锌矿的科学研究丰富了华北陆块南缘区域成矿学认识,并促进了进一步找矿勘查工作。栾川地区铅锌矿产在燕山期斑岩体周围矽卡岩中和外围的断裂带(脉状)中。脉状铅锌矿脉石矿物碳酸盐C、O同位素的组成(赤土店矿床δ13C为 -3.66‰~-2.82‰,δ18O 为10.31‰~15.86‰;百炉沟矿床δ13C为 -3.00‰~1.80‰,δ18O 为9.40‰~17.70‰;冷水北沟矿床δ13C 为-4.90‰~-0.40‰,δ18O为 6.00‰~12.50‰)介于典型海相石灰岩(δ13C为0±2‰,δ18O为28‰~30‰)和岩浆岩(δ13C为-3‰~-30‰,δ18O为6‰~12‰;地幔δ13C为-7‰~-5‰)之间,指示成矿流体、成矿物质的岩浆和地层双重作用、两种来源特点。综合分析认为,栾川地区铅锌矿有矽卡岩型和岩浆热液充填-交代型两种。

关键词: 铅锌矿床, 碳、氧同位素, 岩浆热液充填-交代型矿床, 矽卡岩型矿床, 豫西南栾川

Abstract:

 It has been made a big progress in Pb-Zn Prospecting in southwestern Henan Province recently.Especially, more than ten vein groups of Pb-Zn-Ag mineralization (more than 100 Pb-Zn-Ag veins) have been found in Luanchuan district, which shows a broad prospection of Pb-Zn-Ag resources.The scientific research on these Pb-Zn-Ag ore veins enriches knowledge on regional metallogeny of southern margin of North China Craton and promotes the pace of Pb-Zn prospecting.Pb-Zn ores in Luanchuan district occur in skarn around Yanshannian porphyries or in fractures (vein type) peripheral to Yanshannian porphyries.Gangue carbonate of vein type Pb-Zn ore has carbon and oxygen isotope compositions (Chitudian Pb-Zn deposit: δ13C ranges from-3.66‰ to -2.82‰ and δ18O ranges from   10.31‰ to 15.86‰; Bailugou Pb-Zn deposit: δ13C ranges from -3.00‰ to 1.80‰,δ18O ranges from 9.40‰ to 17.70‰; Lengshuibeigou Pb-Zn deposit: δ13C ranges from -4.90‰ to -0.40‰,δ18O ranges from 6.00‰ to 12.50‰) between typical marine limestone (δ13C is 0 ± 2‰,δ18O ranges from 28‰ to 30‰) and magmatic rock (δ13C ranges from-3‰ to -30‰,δ18O ranges from 6‰ to 12‰;mantle: δ13C ranges from-5‰ to -7‰), which shows the ore forming fluid and metals bear characteristics of dual function and both sources of magma and strata.It can be concluded from synthetic analysis that Pb-Zn ore deposits in Luanchuan district are skarn type or magmatic hydrothermal filling-metasomatic type

Key words:  lead and zinc deposit, carbon and oxygen isotope, magmatic hydrothermal filling-metasomatic type deposit, skarn type deposit, Luanchuan,Southwest Henan Province

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