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现代地质 ›› 2010, Vol. 24 ›› Issue (1): 42-51.

• 矿床学 • 上一篇    下一篇

青海东莫扎抓铅锌矿床硫化物特征及成因意义

  

  1. 1.中国地质大学 国土资源与高新技术研究中心，北京100083；2.中国地质大学 北京市国土资源信息开发研究重点实验室，北京100083；3.中国地质大学 地质过程与矿产资源国家重点实验室，北京100083；4.中国地质科学院 矿产资源研究所，北京100037  
  • 出版日期:2010-02-20 发布日期:2010-03-29
  • 作者简介:丛源，女，博士研究生，1980年出生，矿产普查与勘探专业，主要从事矿床方面的研究工作。 Email：congyuan97@sohu.com
  • 基金资助:

    中国地质调查局“西南三江北段铜多金属成矿条件研究”项目(1212010630804)。

Characteristics of Sulfide Minerals in Dongmozhazhua Lead-zinc Deposit, Qinghai Province, and Their Genetic Significance

  1. 1.Institute of Land Resources and High Techniques, China University of Geosciences, Beijing100083, China;  2.Beijing Key Laboratoryof Research and Exploration Information of Land Resources, China University of Geosciences, Beijing100083,China; 3.State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing100083, China;  4.Institute of Mineral Resources，Chinese Academy of Geological Sciences， Beijing100037,China
  • Online:2010-02-20 Published:2010-03-29

PDF (PC)

11587

被引次数

17

摘要：

青海东莫扎抓矿床是新探明的一个大型铅锌矿床。通过大量矿石光薄片观察、等离子质谱、电子探针分析，对其矿石矿物进行系统研究。结果表明：矿石矿物发育一套中温热液矿物组合；围岩蚀变具有中温蚀变特点；硫化物的硫同位素具有MVT型块状硫化物的特征。综合研究认为，东莫扎抓铅锌矿至少可分为3期成矿:在海相白云岩沉积阶段存在闪锌矿、黄铁矿等金属硫化物的热液喷流沉积成矿；在弧后前陆盆地构造环境中发育有MVT型铅锌矿床成矿；在后期构造运动热液作用下，之前形成的铅锌矿可能会发生热液叠加改造。因此，东莫扎抓具有多期次多阶段叠加成矿的特点。

关键词: 硫化物, 铅锌矿, 东莫扎抓, 青海

Abstract:

The Dongmozhazhua ore deposit is a new largesize lead-zinc deposit in the south of Qinghai Province. Based on a considerable number of polished ore sections as well as massive spectrum and electron microprobe analyses, the systematic study on ore minerals is finished. The results show that the ore mineral is intermediate-temperature hydrothermal mineral association. Wall rock alteration is intermediatetemperature alteration. Sulfide isotope has the characteristic of the sulfides isotope in massive sulfide deposit. Combining the study results, it is believed that Dongmozhazhua leadzinc deposit has experienced three stages mineralization. In the stage of marine dolomite sedimentation, there exist hydrothermal sedimentationexhalation mineralization of sphalerite, pyrite and else metal sulfides. The structure environment of the back （front） arc basin is characterized by development of massive sulfide leadzinc deposits. In the late tectonic activity and hydrothermal process, the leadzinc deposit maybe occur hydrothermal superimposition and reformation. Therefore, the Dongmozhazhua leadzinc deposit has characteristics of the multistage and superimposed metallization.

Key words: sulfide mineral, leadzinc deposit, Dongmozhazhua, Qinghai

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