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冀北地区龙头山铅多金属矿床的发现及地物化综合找矿模型的建立

王建 朱立新 马生明 周伟伟 陈风河 苏振华 贾志超

王建, 朱立新, 马生明, 等, 2019. 冀北地区龙头山铅多金属矿床的发现及地物化综合找矿模型的建立. 地质力学学报, 25 (1): 9-18. DOI: 10.12090/j.issn.1006-6616.2019.25.01.002
引用本文: 王建, 朱立新, 马生明, 等, 2019. 冀北地区龙头山铅多金属矿床的发现及地物化综合找矿模型的建立. 地质力学学报, 25 (1): 9-18. DOI: 10.12090/j.issn.1006-6616.2019.25.01.002
WANG Jian, ZHU Lixin, MA Shengming, et al., 2019. THE APPLICATION OF THE INTEGRATED GEOLOGICAL, GEOPHYSICAL AND GEOCHEMICAL PROSPECTING METHOD IN THE DISCOVERY OF THE LONGTOUSHAN LEAD POLYMETALLIC DEPOSIT IN NORTHERN HEBEI PROVINCE. Journal of Geomechanics, 25 (1): 9-18. DOI: 10.12090/j.issn.1006-6616.2019.25.01.002
Citation: WANG Jian, ZHU Lixin, MA Shengming, et al., 2019. THE APPLICATION OF THE INTEGRATED GEOLOGICAL, GEOPHYSICAL AND GEOCHEMICAL PROSPECTING METHOD IN THE DISCOVERY OF THE LONGTOUSHAN LEAD POLYMETALLIC DEPOSIT IN NORTHERN HEBEI PROVINCE. Journal of Geomechanics, 25 (1): 9-18. DOI: 10.12090/j.issn.1006-6616.2019.25.01.002

冀北地区龙头山铅多金属矿床的发现及地物化综合找矿模型的建立

doi: 10.12090/j.issn.1006-6616.2019.25.01.002
基金项目: 

中国地质科学院基本科研业务费专项经费 YYWF201731

详细信息
    作者简介:

    王建(1985-), 男, 在读博士, 地球化学专业。E-mail:beijingwangjian@163.com

    通讯作者:

    马生明(1963-), 男, 博士, 教授级高工, 主要从事矿产勘查地球化学理论方法研究。E-mail:mashengming@igge.cn

  • 中图分类号: P632;P618.42

THE APPLICATION OF THE INTEGRATED GEOLOGICAL, GEOPHYSICAL AND GEOCHEMICAL PROSPECTING METHOD IN THE DISCOVERY OF THE LONGTOUSHAN LEAD POLYMETALLIC DEPOSIT IN NORTHERN HEBEI PROVINCE

  • 摘要: 隐伏矿是当前矿产地质勘查的重点对象。在综合研究冀北地区1:20万区域示矿信息基础上,优选出锥子山花岗岩体一带的龙头山为找矿靶区,研究显示其具有较好的找矿潜力。1:5万水系沉积物地球化学测量圈定出11处综合异常;其中H6异常属于矿致异常。H6异常经1:1万地物化测量显示:Ag、Pb、Zn、Au等元素异常值高,具有外带—中带—内带三级分带;同时具有中低阻高极化的激电异常、蚀变矿(化)带与物化探异常相耦合的特征。通过进行系统地不同尺度地物化测量,缩小了找矿靶区,经工程验证发现了龙头山铅多金属矿床。矿体赋存在北西西向延伸、宽30~60 m的龙头山(F3)断裂构造系统中、产状较陡,赋矿围岩为太古界单塔子群(花岗)片麻岩和晚侏罗世张家口组安山岩,矿石多为细脉—浸染状、致密块状构造,矿床特征与毗邻的小扣花营、牛圈等多金属矿床类似,属于中低温热液脉型铅多金属矿床。最后,根据大比例尺地物化示矿信息特征,厘定了热液脉型铅多金属矿床的找矿标志,建立了地物化综合找矿模型,有利于推进冀北地区的找矿勘查。

     

  • 图  1  冀北地区龙头山铅多金属矿区域地质图

    Figure  1.  The regional geological map of the Longtoushan lead-polymetallic deposit in Northern Hebei province

    图  2  龙头山铅多金属矿床Ⅰ号矿体地质简图

    Figure  2.  The geological skecth map of No.Ⅰ ore body in the Longtoushan lead-polymetallic deposit

    图  3  龙头山铅多金属矿床1:5万水系沉积物测量Au、Ag、Pb、Zn元素异常图

    Figure  3.  The geochimical anomaly map of the Longtoushan lead-polymetallic deposit

    图  4  龙头山铅多金属矿床Ⅰ号矿体1:1万土壤地球化学测量Au、Ag、Pb、Zn元素综合异常图

    Figure  4.  The anomaly map of the soil geochemical survey in the No.Ⅰ ore body of Longtoushan lead-polymetallic deposit

    图  5  龙头山铅多金属矿床地球物理等值线平面图

    a—视极化率等值线平面图;b—视电阻率等值线平面图

    Figure  5.  The polarizability (ηs) map and resistivity (ρs) map of the Longtoushan lead-polymetallic deposit

    图  6  冀北地区铅多金属矿床地物化综合找矿模型

    Figure  6.  The comprehensive prospecting model of the lead-polymetallic deposit in northern Hebei province

    表  1  龙头山铅多金属矿区岩石、矿石物性参数测量表

    Table  1.   The physical properties of rocks and ores in the Longtoushan lead-polymetallic deposit

    岩性 极化率ηs/% 电阻率ρs/(Ω·m)
    min max 常见值 min max 常见值
    角闪斜长片麻岩 0.76 2 1.13 28 217 83
    片麻岩 0.72 1.55 1.18 418 1859 998
    潜流纹岩 0.65 1.84 0.93 23 96 33
    花岗岩脉 0.60 1.91 1.36 154 2884 856
    矿化蚀变带 0.09 0.98 0.48 43 226 125
    铅多金属矿(化)体 1.00 17.82 7.19 2 95 29
    下载: 导出CSV

    表  2  冀北地区铅多金属矿床地质-地球物理-地球化学综合找矿信息表

    Table  2.   The comprehensive prospecting information of the lead-polymetallic deposit in northern Hebei province

    信息类别 找矿标志和信息
    地质 地层条件 太古界单塔子群片麻岩是较为有利的赋矿围岩
    构造条件 受次级断裂构造控制,以北西断裂为主,微细裂隙发育
    岩浆岩条件 矿体主要产于燕山期安山岩中,且伴有大量脉岩
    围岩蚀变 硅化、高岭土化、萤石化、青磐岩化等
    矿种类型 铅及银锌金等多金属矿化、铁锰矿化
    主要金属矿物 原生矿物主要有黄铁矿、方铅矿、闪锌矿等;次生矿物有褐铁矿、硬锰矿等
    主要非金属矿物 石英、方解石、萤石、绿泥石、绿帘石
    地球化学 1:5万水系沉积物测量 异常面积大,成矿元素齐全、组合好;具有明确的元素分带
    1:1万土壤地球化学测量 成矿元素异常值高、耦合好;有浓集中心且浓度分带明显
    成矿元素组合 Pb、Zn、Ag、Au、As、Sb
    Pb与Mn、Ag等成矿元素呈正相关关系
    地球物理 1:1万激电中梯测量 低阻高极化激电异常是较为有利的地球物理找矿标志。
    物化探组合异常 与不同尺度的地球化学异常耦合的条带状激电异常带
    下载: 导出CSV
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  • 收稿日期:  2018-10-23
  • 修回日期:  2018-12-18
  • 刊出日期:  2019-02-01

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