欢迎访问现代地质!

现代地质 ›› 2008, Vol. 22 ›› Issue (5): 733-742.

• 矿床学 • 上一篇    下一篇

青海谢坑铜金矿床石榴石矽卡岩成因研究

王星1 ,肖荣阁2 , 杨立朋2 ,王斌2   

  1. 1青海省有色地质七队,青海 平安810600;2中国地质大学 地球科学与资源学院,北京100083
  • 收稿日期:2008-07-02 修回日期:2008-08-30 出版日期:2008-10-20 发布日期:2009-11-12
  • 通讯作者: 肖荣阁,男,教授,博士生导师,1949年出生,矿物学、岩石学、矿床学专业,主要从事矿床地球化学教学与研究工作。Email:rgxiao@163.com
  • 作者简介:王星,男,高级工程师,1965年出生,矿物学、岩石学、矿床学专业,主要从事矿产勘查工作。
  • 基金资助:

    河南省国土资源厅科研项目(2008-4);中国地质大学(北京)地质过程与矿产资源国家重点实验室科学基金项目(GPMR200646)

Genesis of Garnet Skarn of the Xiekeng Cu-Au Deposit in Qinghai Province

WANG Xing1,XIAO Rong-Ge2,Yang-Li-Peng2,WANG Bin2   

  1. 17th Team of Qinghai Geological Prospecting Bureau of Non-Ferrous Metal, Pingan, Qinghai  810600, China;
     2School of Earth Sciences and Resources, China University of Geosciences, Beijing  100083, China
  • Received:2008-07-02 Revised:2008-08-30 Online:2008-10-20 Published:2009-11-12

摘要:

传统矿床学研究认为,只能是中酸性岩浆接触交代碳酸盐岩形成矽卡岩,但是近年来在一系列矽卡岩矿床的研究中发现,矽卡岩原岩并非纯的碳酸盐岩,一些矽卡岩原岩成分接近矽卡岩的成分,因此传统的矽卡岩型矿床成因也值得重新认识。青海省循化县谢坑铜金矿床是20世纪90年代以来发现的石榴石矽卡岩和石榴石透辉石型矽卡岩矿床。通过系统研究该矿床矽卡岩的地球化学特征,发现矿化矽卡岩岩石化学特征及稀土元素、微量元素地球化学特征与泥灰岩和辉石闪长岩类岩浆岩的极其一致,因此该矽卡岩并非传统意义上的矽卡岩,而是热液作用下的岩浆岩及泥灰岩的自变质成因矽卡岩。

关键词: 矽卡岩成因, 岩石地球化学, 自变质成因, 谢坑铜金矿, 青海

Abstract:

According to the traditional mineral deposit geological data, skarn is only formed from intermediate-acid magma contacting and replacing carbonate, but skarn original rocks are not pure carbonates and their compositions of some skarn original rocks are close to those of skarn in recent studies, so the traditional genesis of skarn deposit would be further investigated. Xiekeng Cu-Au deposit, Xunhua County, Qinghai Province, which was found in 1990's, is a garnet-skarn-type and garnet-diopside-skarn-type deposit. Petrochemical characteristics and geochemical characteristics of rare earth elements and trace elements of the mineralized skarn are rather similar to those of the marlitic-sedimentary and pyroxene-diorite-type magmatic rocks, therefore, this kind of skarn is not the traditional skarn but the skarn which is formed by auto-metamorphism of magmatic rock and marliticsedimentary in the hydrothermal process by systematically studying on the geochemical characteristics of the skarn.

Key words: genesis of skarn, petrological geochemistry, genesis of auto-metamorphism, Xiekeng Cu-Au deposit, Qinghai Province

中图分类号: