地球科学进展

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2014 , Vol. 29 >Issue 8: 974 - 984

DOI: https://doi.org/10.11867/j.issn.1001-8166.2014.08.0974

紫金山金铜矿黄铁矿化学成分标型特征及其意义

  • 张文媛 ,
  • 王翠芝 ,
  • 魏晓灿 ,
  • 范明森 ,
  • 陈丽华
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  • 1 福州大学紫金矿业学院, 福建福州 350108
    2 紫金矿业集团股份有限公司, 福建上杭 364200

作者简介：张文媛（1989-）, 女, 安徽合肥人, 硕士研究生, 主要从事矿床地球化学研究. E-mail: wenyuanzhang66@163.com

*通讯作者：王翠芝（1965-）, 女, 山东定陶人, 教授, 主要从事矿床成矿规律及矿产开发利用研究.E-mail: wcuizhi@163.com

收稿日期: 2014-04-29

  修回日期: 2014-07-21

  网络出版日期: 2014-09-17

基金资助

国家自然科学基金项目“紫金山铜金矿硫酸盐对成矿的指示作用”（编号：41072067）资助

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, 2014,
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The Implications and Typomorphic Characteristics of Pyrite Chemical Composition in Zijinshan GoldCopper Deposit

  • Wenyuan Zhang ,
  • Cuizhi Wang ,
  • Xiaocan Wei ,
  • Mingsen Fan ,
  • Lihua Chen
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  • (1 Zijinmining college of Fuzhou university, Fuzhou 350108, China
    2 Zijin Mining grop company limited, Shanghang 364200, China)

Received date: 2014-04-29

  Revised date: 2014-07-21

  Online published: 2014-09-17

Copyright

地球科学进展 编辑部, 2014, This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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摘要

紫金山金铜矿属典型的高硫化型浅成低温热液矿床。黄铁矿的电子探针（EPMA）测试和S同位素分析显示, 该区黄铁矿总体表现为亏Fe富S型, S/Fe原子比从浅部到深部呈现升高的趋势, 表明深部成矿是高氧—高硫化环境;黄铁矿的Ni-Co图解、As-Co-Ni三角相图解及w(Se), w(S)/w(Se)标型特征显示, 其是与火山作用有关的热液成因;该区黄铁矿是原生金的主要载金矿物, Au是以纳米级自然金（Au0）的形式存在的;黄铁矿的w(Cu+Pb+Zn)从浅部到深部呈逐渐增加的趋势;黄铁矿微量元素的lga-lgb成正相关关系;黄铁矿的微量元素综合比值Φ从浅部到深部呈逐渐降低的趋势;黄铁矿的S同位素结果表明, 其δ34S值介于-3.0‰~3.5‰之间, 极差为6.50‰, 平均值为-0.18‰, S主要来源于深部岩浆。根据其化学成分标型特征, 总结该矿床的产出环境、热液及成矿物质来源等成因信息, 并对高硫化型浅成低温热液矿床中黄铁矿的化学成分标型提供一定的研究基础。

关键词： 紫金山金铜矿床; 黄铁矿; 化学成分; 电子探针; S同位素

本文引用格式

张文媛 , 王翠芝 , 魏晓灿 , 范明森 , 陈丽华 . 紫金山金铜矿黄铁矿化学成分标型特征及其意义[J]. 地球科学进展, 2014 , 29(8) : 974 -984 . DOI: 10.11867/j.issn.1001-8166.2014.08.0974

Abstract

：Zijinshan Gold-copper deposit is attributed to the typical high- sulphidation epithermal deposit. Byingthe electron microprobe (EPMA) test and sulfur isotope analysis of pyrite shows that the generally pyrite is sulfur-rich and iron- deficiency type in this area. From shallow to deep, the S / Fe atomic ratio showing increasing trend. It indicated that a metallogenic environment of highly acidic with high oxygen and sulfur fugacity. The Ni-Codiagrams, As-Co-Ni ternary phase diagrams and standard type features of w(Se) and w(S)/ w(Se) indicated that the pyrite is hydrothermal related to volcanism. Pyrite of this area is the contained gold mineral, the occurrence of gold in pyrite exist in nanoscale particle form. w(Cu + Pb + Zn) of pyrite Tend to gradually increased from shallow to deep. The trace elements lga-lgb of pyrite was positive correlation. The comprehensive trace element ratios Ф of pyrite was gradually decreased from shallow to deep. The sulfur isotope analysis results of pyrite showed that the {Invalid MML} value from -3.0‰ to 3.5‰, with amean of 6.50‰ and average of -0.18‰, which are similar to the magmatic sulfur. According to the typomorphic characteristics of the chemical composition, summarizing the environment of the deposit, the causes information, such as the hydrothermal, the mineral sources and so on .It also provides certain research bases to study the typomorphic characteristic of pyrite composition in the high sulphidation type epithermal gold-copper deposit.

Key words： Zijinshan gold-copper deposit; pyrite; chemical composition; EPMA; sulfur isotope

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