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  • CN 62-1112/TF 
  • ISSN 1005-2518 
  • 创刊于1988年
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广西龙头山金矿床赋矿岩石地球化学特征

  • 张春鹏 ,
  • 曾南石
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  • 1.沈阳地质矿产研究所,辽宁  沈阳   110034;
    2.桂林理工大学地球科学学院,广西  桂林   541004
张春鹏(1982-),男,吉林四平人,工程师,从事成矿规律与成矿预测研究工作.zcp345@foxmail.com

收稿日期: 2013-11-20

  修回日期: 2014-02-17

  网络出版日期: 2014-08-26

基金资助

广西自然科学基金项目“广西贵港天平山—宾阳龙头山地区成矿热液活动规律研究”(编号:桂科自0640179)资助.

Geochemical Characteristics of Ore-bearing Rocks in Longtoushan Gold Deposit,Guangxi Province

  • ZHANG Chunpeng ,
  • ZENG Nanshi
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  • 1.Shenyang Institute of Geology and Mineral Resources,Shenyang   110034,Liaoning,China;
    2.College of Earth Sciences,Guilin University of Technology,Guilin   541004,Guangxi,China

Received date: 2013-11-20

  Revised date: 2014-02-17

  Online published: 2014-08-26

摘要

广西龙头山金矿床产于晚中生代残存的火山颈机构中。通过对金矿床火山—次火山岩的类型、空间展布及其岩石学和岩石化学等特征分析,结果表明:SiO2含量变化在62.77%~75.24%之间,La/Ce与Rb/Ti比值基本不变,稀土配分曲线为向右倾斜的富轻稀土型,同时铕亏损强烈。研究认为本区岩浆岩均属亚碱性系列英安流纹斑岩类岩石,为一套陆相中心式火山—次火山喷发—侵入岩系,形成于具有火山弧(碰撞期前)—同碰撞性质的构造环境中,具壳幔混合来源特征。

本文引用格式

张春鹏 , 曾南石 . 广西龙头山金矿床赋矿岩石地球化学特征[J]. 黄金科学技术, 2014 , 22(2) : 17 -23 . DOI: 10.3969/j.issn.1005-2518.2014.02.017

Abstract

Longtoushan gold deposit occurs in a late Mesozoic residual volcanic neck.The characteristics of Mesozoic volcanic-subvolcanic rocks,such as their types,space distributions and petrology etc.have been analyzed.The data of petrography and geochemistry shows that the SiO2 contents range from 62.77% to 75.24%, the La/Ce and Rb/Ti ratios are basically not changed.The right dipping of REE partitioning curves shows rich in light rare earth elements,and Europium loses a lot.These rocks are formed mainly by rhyodacitic magma,and indicate that they might result from the same magma chamber.The division of trace elements reflect that formation of the volcanic-subvolcanic rocks has a tectonic background of VGA-Syn-COLD type.The genetic series of these granitic rocks may belong to that of mixed crust-mantle derivation.

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