欢迎访问现代地质!

现代地质 ›› 2008, Vol. 22 ›› Issue (5): 751-756.

• 矿床学 • 上一篇    下一篇

阜新萤石成矿区稀土元素地球化学特征及指示意义

杨子荣1,刘敬党2,孙祥1,王文武2,徐大地2,王永春1   

  1. 1辽宁工程技术大学 资源与环境工程学院, 辽宁 阜新123000;2辽宁省化工地质勘查院, 辽宁 锦州121000
  • 收稿日期:2008-06-22 修回日期:2008-09-22 出版日期:2008-10-20 发布日期:2009-11-12
  • 作者简介:杨子荣,男,教授,博士生导师,1951年出生,地质工程专业,主要从事地质勘察与技术研究。
  • 基金资助:

    辽宁省科技规划项目(KJ-2005-001);辽宁工程技术大学基金项目(07-99)

REE Geochemical Characteristics of Fluorite in Fuxin Metallogenic Region and Its Geological Implications

  1. 1College of Resource and Environment Engineering,Liaoning Technical University, Fuxin, Liaoning123000, China;
    2Liaoning Geological Survey for Chemical Industry, Jinzhou, Liaoning121000, China
  • Received:2008-06-22 Revised:2008-09-22 Online:2008-10-20 Published:2009-11-12

摘要:

为了研究阜新萤石成矿机制,对其稀土元素地球化学特征进行了分析。阜新地区萤石矿赋存于早二叠世、晚三叠世和晚侏罗世花岗岩中。地球化学分析结果显示,所有萤石均具有弱的Ce负异常,其稀土配分模式存在3种类型:Eu明显亏损型、Eu弱亏损型和Eu富集型。萤石中稀土元素的含量并不随围岩中的稀土元素含量的增加而增加,晚期侵入的花岗岩富集轻稀土元素。从成矿早期到成矿晚期,萤石的稀土元素配分型式从Eu明显亏损型向富集型演化,稀土元素总量逐渐降低。赋存于早二叠世和晚三叠世花岗岩中萤石矿流体包裹体中SO2-4含量及液相成分还原参数指标指示,成矿流体由还原条件向氧化条件转变,成矿物质主要来源于赋矿花岗岩。

关键词: 稀土元素, 地球化学, 成矿流体, 萤石矿床, 阜新

Abstract:

In order to research the metallogenic characteristics of the Fuxin fluorite ore area,the paper discusses the REE geochemical characteristics. The results show that fluorites occur in Early Permian, Late Triassic and Late Jurassic granite with negative Ce anomaly and three types of the REE distribution patterns such as negative, normal and positive Eu anomaly for fluorite. The content of REE in fluorite does not increase with the fluorite content in the country rocks. The granite which interuded in late period is rich in light REE. Total REE content decreases gradually and the REE distribution pattern evolves from depleted Eu to enriched Eu from the early period to the late period. The content of SO2-4 in the mineral fluid inclusions and the liquid composition reduction parameter existing in Early Permian and Late Triassic indicate that ore-forming fluid has evolved from deoxidized condition to oxidized condition. The ore-forming material sources originate from the granite.

Key words: REE, geochemistry, ore-forming fluid, fluorite deposit, Fuxin

中图分类号: