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现代地质 ›› 2018, Vol. 32 ›› Issue (04): 646-654.DOI: 10.19657/j.geoscience.1000-8527.2018.04.02

• 矿床学与地球化学 • 上一篇    下一篇

东昆仑哈日扎铅锌多金属矿床金属矿物与S-Pb同位素特征

张斌1,2(), 杨涛1, 杨生飞1, 李金超1, 孔会磊1   

  1. 1.中国地质调查局 西安地质调查中心, 陕西 西安 710054
    2.西北有色地质勘查局 七一七总队, 陕西 宝鸡 721015
  • 收稿日期:2017-10-16 修回日期:2018-01-30 出版日期:2018-08-10 发布日期:2018-09-19
  • 作者简介:张 斌,男,助理工程师,硕士,1990年出生,地质工程专业,主要从事区域成矿及成矿规律研究。Email: zerob131@126.com
  • 基金资助:
    中国地质调查局地质调查项目(DD20160013)

The Metallic Minerals and S and Pb Isotope Compositions of the Harizha Lead-Zinc Polymetallic Deposit, East Kunlun

ZHANG Bin1,2(), YANG Tao1, YANG Shengfei1, LI Jinchao1, KONG Huilei1   

  1. 1. Xi’an Center of Geological Survey,China Geological Survey,Xi’an,Shaanxi 710054,China
    2. No.717 Geological Team, Northwest Mining and Geological Exploration Bureau for Nonferrous Metals,Baoji,Shaanxi 721015,China
  • Received:2017-10-16 Revised:2018-01-30 Online:2018-08-10 Published:2018-09-19

摘要:

东昆仑哈日扎铅锌多金属矿床位于东昆仑造山带东段,紧邻昆中断裂北侧。已获得的资料显示哈日扎铅锌多金属矿床具有良好的找矿前景。通过对矿床内主要金属矿物及其S-Pb同位素组成进行详细研究,探讨其成矿温度与物质来源。研究表明:闪锌矿中Fe元素含量为9.751%~12.736%,Zn/Cd比值的变化范围为56.50~114.39,初步推测成矿温度为中—低温;矿床中各硫化物的δ34S值变化范围为-3.8‰~-0.5‰,具有深部岩浆硫的特征,且不同硫化物矿物中的S同位素未达到平衡分馏;Pb同位素变化相对较小,206Pb/204Pb、207Pb/204Pb及208Pb/204Pb值变化范围分别为18.254~18.504、15.614~15.800和38.429~39.028;表明其成矿物质主要来源于下地壳的部分熔融与深部岩浆的混合。

关键词: 硫、铅同位素, 金属矿物, 东昆仑, 哈日扎

Abstract:

The Harizha lead-zinc polymetallic deposit is located in the eastern part of the East Kunlun orogenic belt, closing to the north side of the central Kunlun fault. The reported data show that the Harizha lead-zinc polymetallic deposit has a good prospecting potential. This paper focuses on the temperature and source of ore-forming materials, based on the studies on the characteristics of metallic minerals and their S-Pb isotopes from the Harizha lead-zinc polymetallic deposit. The data show that the content of Fe in sphalerite ranges from 9.751% to 12.736%,and the range of Zn/Cd value is 56.50 to 114.39, suggest that the Harizha lead-zinc polymetallic deposit is a medium-low temperature deposit; The δ34S values of sulfide minerals in the deposit range from -3.8‰ to -0.5‰, indicating that sulfur is sourced from the deep-source magma,and the S in different sulfides are not in equilibrium. The 206Pb/204Pb,207Pb/204Pb and 208Pb/204Pb ratios of sulfide ores are 18.254-18.504, 15.614-15.800 and 38.429-39.028, respectively, which suggest that the ore-forming materials were mainly derived from the parental magma generated by mixing of mafic magma and felsic magma formed by remelting of lower crustal rocks.

Key words: S and Pb isotopes, metallic mineral, East Kunlun, Harizha

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