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黄金科学技术 ›› 2017, Vol. 25 ›› Issue (2): 23-31.doi: 10.11872/j.issn.1005-2518.2017.02.023

• 矿产勘查与资源评价 • 上一篇    下一篇

河南嵩县下蒿坪金矿地球化学特征及成因探讨

秦军强1,董文超2*,聂怀跃1,庞开元3   

  1. 1.河南省地质矿产勘查开发局第二地质矿产调查院,河南  郑州   450002;
    2.河南理工大学资源环境学院,河南  焦作   454000;
    3.河南洛阳矿业集团镇平有色矿业有限公司,河南  镇平   474250
  • 收稿日期:2016-09-01 修回日期:2017-02-14 出版日期:2017-04-28 发布日期:2017-05-12
  • 通讯作者: 董文超(1991-),男,河南新乡人,硕士研究生,从事矿床学研究工作。949206185@qq.com
  • 作者简介:秦军强(1972-),男,河南林州人,工程师,从事矿产普查与勘探工作。1058565220@qq.com
  • 基金资助:

    中国地质调查局科研项目“河南省熊耳山—外方山金多金属矿整装勘查区关键基础地质研究”(编号:12120114035401)和河南省 “两权”价款项目“河南省嵩县东湾—槐树坪金矿床地球化学特征及成矿预测研究”(编号:2014-17)联合资助

Discussion on the Geochemistry Characteristics and Genesis of Xiahaoping Gold Deposit in Song County,Henan Province

QIN Junqiang1,DONG Wenchao2,NIE Huaiyue1,PANG Kaiyuan3   

  1. 1.No.2 Institute of Geological & Mineral Resources Survey of Henan,Zhengzhou    450002,Henan,China;
    2.Institute of Resources and Environment,Henan Polytechnic University,Jiaozuo    454000,Henan,China;
    3.Zhenping Nonferrous Metal Mining Co.,Ltd.,Henan Luoyang Mining Group,Zhenping    474250,Henan,China
  • Received:2016-09-01 Revised:2017-02-14 Online:2017-04-28 Published:2017-05-12

摘要:

下蒿坪金矿南邻区域性大断裂和燕山晚期花岗岩基,西邻店房中型隐爆角砾岩型金矿,矿区内构造及脉岩发育,成矿地质条件良好。稀土元素分析结果显示,样品具有较高的稀土总量,矿石的稀土平均值达207.7×10-6,LREE/HREE为6.81~14.19,轻稀土富集,轻重稀土分异明显,其中金矿石的δEu为0.49~1.37,变化于亏损至富集的2个端元。从合峪岩体→金矿石→爆破角砾岩,稀土总量逐渐增加,暗示成矿热液对岩浆岩的后期影响。微量元素分析结果显示Au、Pb、Cd、Bi、Ag、Cu、As和Zn等亲硫元素高度富集,反映富硫还原的成矿环境。黄铁矿中Pb同位素特征显示物质来源单一,同位素指标与燕山期花岗岩十分接近。矿床成矿时间为(129±45)Ma,与合峪岩体时代相近,暗示与花岗岩有成因联系。

关键词: 地球化学特征, 矿床成因, 下蒿坪金矿, 嵩县, 河南省

Abstract:

The south of Xiahaoping gold deposit is regional faults and late Yanshan granite,and the west of Xiahaoping gold deposit is medium hydrothermal breccia pipe gold deposit of Dianfang.The developing of the gold deposit area are structure and vein rock.Mineralization geological condition is favorable.The rare earth element analysis results show that the sample has a high total amount of rare earth.The average value of rare earth ore is 207.7×10-6.LREE/HREE is from 6.81 to 14.19,which indicates that the light rare earth is enrich,and the light rare earth and the heavy rare earth are obvious difference.The δEu of gold ore is from 0.49 to 1.37,which changes in the between loss and enrichment of two endmembers.From Heyu multistage granite→Gold ore→Explosive breccia,the total amount of rare earth increases gradually,which implies that the influence of ore-forming hydrothermal fluids on magmatic rocks.The results of the trace element analysis show that sulfophilic elements are enrich highly,such as Au,Pb,Cd,Bi,Ag,Cu,As,Zn,which reflects the metallogenic environment of sulfur rich reduction.The characteristics of Pb isotope in pyrite show that the source of material is single,and isotope index is very close to period granite of Yanshan.Mineralization time of the deposit was 129±45 Ma,it is closed to the era of Heyu rock,which implies that there is a genetic relationship with granite.

Key words: geochemical characteristics, genesis, Xiahaoping gold deposit, Song County, Henan Province

中图分类号: 

  • P618.51

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