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现代地质 ›› 2014, Vol. 28 ›› Issue (4): 711-720.

• 岩石学与矿物学 • 上一篇    下一篇

甘肃马坞金矿床8号矿体黄铁矿热电性特征及其地质意义

刘坤1,2,刘家军1,吴杰1,刘冲昊1,杨尚松1,辛晓军3,李渊3   

  1. (1.中国地质大学(北京)地质过程与矿产资源国家重点实验室,北京100083;2.河南省地质调查院,河南 郑州450001;
    3.中国人民武装警察部队 黄金第五支队,陕西 西安710100)
  • 出版日期:2014-09-10 发布日期:2014-09-12
  • 通讯作者: 刘家军,男,教授,博士生导师,1963年出生,矿物学、岩石学、矿床学专业,主要从事矿床学研究与教学工作。
  • 作者简介:刘坤,男,硕士研究生,1988年出生,矿物学、岩石学、矿床学专业,主要从事矿床地球化学方面的研究。 Email:liukun8812@163.com。
  • 基金资助:

    国家自然科学重点基金项目(41030423);中国地质调查局地质调查工作项目(1212011220805,1212011220924);中国人民武装警察部队武警黄金地质研究所项目(WHY(05)-03);高等学校学科创新引智计划(B07011)。

Thermoelectric Characteristic of Pyrites from No.8 Orebody of the Mawu Gold Deposit in Gansu Province and Its Significance

LIU Kun1,2,LIU Jia-jun1,WU Jie1,LIU Chong-hao1,YANG Shang-song1,XIN Xiao-jun3,LI Yuan3   

  1. (1.State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing100083, China;
    2.Henan Institute of Geological Survey, Zhengzhou, Henan450001,China;
    3. No.5 Gold Geological Party of Chinese Armed Police Force, Xi‘an, Shaanxi710100,China)
  • Online:2014-09-10 Published:2014-09-12

摘要:

位于西秦岭岷(县)—礼(县)成矿带西段的马坞金矿床,是近年发现的一个中型微细浸染型金矿床。系统地研究了该矿床8号矿体黄铁矿的热电性标型特征,结果表明:8号矿体的黄铁矿热电导型以N型为主,总含量达到71.2%;成矿温度主要集中于200~300 ℃,属于中温矿床;黄铁矿热电导型及热电性参数特征反映出矿体被剥蚀到中部偏下的位置,向深部仍有一定规模的延伸;P型黄铁矿出现的频率从浅部到深部呈减小、增大再减小的趋势;金品位的高值区域、P型黄铁矿热电系数平均值的高值区域与热电系数离散度的高值区域三者相互对应。

关键词: 黄铁矿, 热电性, 金矿床, 马坞, 甘肃

Abstract:

Located in the western part of the Min-Li metallogenic belt in the Western Qinling Mountains, the Mawu gold deposit is a medium carlin-type disseminated gold deposit discovered in recent years. Based on a study of the thermoelectric characteristics of pyrites in No.8 orebody, the authors put forward the following conclusions. The thermoelectric properties of pyrites in No.8 orebody are mainly of the N type, with a total content of 71.2%. The ore-forming temperature of the deposit ranges from 200 to 300 ℃,indicating that the deposit is a medium temperature gold deposit. The thermoelectricity characteristics imply that the lower to middle parts of the orebody have been eroded, and there exists an extension of No.8 orebody in the deep. The frequency of P-type pyrite is reducing, and then increasing and finally decreasing from top to bottom. The high average gold grade corresponds with the high P-type pyrite thermoelectric coefficient value and the high thermoelectric coefficient dispersion value.

Key words: pyrite, thermoelectricity, gold deposit, Mawu, Gansu

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