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辽宁白云金矿床成矿构造与成矿结构面特征浅析

李德东 王玉往 张志超 田野 周国超 解洪晶 石煜

李德东, 王玉往, 张志超, 等, 2019. 辽宁白云金矿床成矿构造与成矿结构面特征浅析. 地质力学学报, 25 (S1): 10-20. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.003
引用本文: 李德东, 王玉往, 张志超, 等, 2019. 辽宁白云金矿床成矿构造与成矿结构面特征浅析. 地质力学学报, 25 (S1): 10-20. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.003
LI Dedong, WANG Yuwang, ZHANG Zhichao, et al., 2019. CHARACTERISTICS OF METALLOTECTONICS AND ORE-FORMING STRUCTURAL PLANE IN BAIYUN GOLD DEPOSIT, LIAONING. Journal of Geomechanics, 25 (S1): 10-20. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.003
Citation: LI Dedong, WANG Yuwang, ZHANG Zhichao, et al., 2019. CHARACTERISTICS OF METALLOTECTONICS AND ORE-FORMING STRUCTURAL PLANE IN BAIYUN GOLD DEPOSIT, LIAONING. Journal of Geomechanics, 25 (S1): 10-20. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.003

辽宁白云金矿床成矿构造与成矿结构面特征浅析

doi: 10.12090/j.issn.1006-6616.2019.25.S1.003
基金项目: 

国家重点研发计划项目 2018YFC0603804

中国地质调查局地质调查项目 12120115034001

详细信息
    作者简介:

    李德东(1975-), 男, 博士, 高级工程师, 主要从事矿床学及找矿预测研究工作。E-mail:lidedong2005@126.com

  • 中图分类号: P618.51

CHARACTERISTICS OF METALLOTECTONICS AND ORE-FORMING STRUCTURAL PLANE IN BAIYUN GOLD DEPOSIT, LIAONING

  • 摘要: 白云金矿是辽宁省青城子矿集区大型金矿床之一,文章根据矿山资料及野外详细调查,主要对矿区的成矿构造与成矿结构面进行了梳理。成矿构造主要为成矿期活动的断裂和褶皱,利用侵入其中的含矿岩脉(石英斑岩、花岗斑岩、闪长玢岩和煌斑岩)确定成矿期断裂主要为近东西向、北西向和北东向断裂,成矿期的褶皱主要为姚家岭—天桥岭—李家堡子倒转向斜,该倒转向斜是青城子一带印支期岩浆活动形成的推覆构造形成;成矿结构面主要分为四种,即侵入岩与围岩接触面、层间断裂面或接触面、围岩断裂或裂隙面和水压致裂结构面,并从力学角度分析了这四种结构面的产生机制。最后,讨论了在强烈的由南向北挤压应力作用下,含矿热液沿不同的张性裂隙侵位形成不同矿体样式。

     

  • 图  1  辽宁东部区域构造地质简图(据文献[9]修改)

    Figure  1.  Regional tectonic diagram in eastern Liaoning (modified from [9])

    图  2  辽宁青城子地区矿产地质简图(据文献[1]修改)

    1—第四系砂砾岩;2—盖县组片岩;3—大石桥大理岩;4—高家峪组变粒岩;5—吕梁期花岗岩;6—印支期花岗岩;7—辉长岩;8—闪长玢岩;9—铅锌矿;10—铅矿;11—银矿;12—金矿;13—向斜/背斜;14—断层褶皱构造:①—白云山背斜;②—石湖沟—青城子向斜;③—尖山沟向斜;④—西青台峪—青城子向斜;⑤—新岭背斜;⑥—头道沟向斜;⑦—榛子沟背斜

    Figure  2.  Mineral geological structure map in Qingchengzi ore concentrated area (modified from [1])

    图  3  辽宁省白云金矿床构造地质图(据文献[14]修改)

    1—第四系砂砾岩;2—盖县组片岩;3—大石桥组大理岩;4—斜长角闪岩;5—辉长岩;6—闪长玢岩;7—煌斑岩;8—花岗斑岩;9—石英斑岩;10—矿体及编号;11—背斜;12—向斜;13—倒转背斜;14—倒转向斜;15—断层及编号;16—褶皱编号褶皱:①—白云山背斜;②—阳沟里向斜;③—阳沟-石湖沟背斜;④—姚家沟—天桥沟—李家堡子倒转向斜;⑤—苏家堡子倒转背斜;⑥—顾家堡子倒转向斜断裂:F1—荒甸子—白云—于家堡子断裂;F2—尖山子断裂;F3—王家堡子—车头岭断裂;F4—五羊沟断裂;F5—阳沟断裂;F6—云山断裂;F7—牛圈子—青城子断裂

    Figure  3.  Tectonic geological map of the Baiyun gold mine (modified from [14])

    图  4  白云矿区矿体成矿结构面类型野外照片

    a—硅钾蚀变岩型矿体的花岗斑岩与片岩接触面;b—构造破碎带型矿体的花岗斑岩与片岩接触面;c—围岩地层大理岩与变粒岩接触面;d—石英脉岩型矿体的围岩中的热液脉和角砾型结构面

    Figure  4.  Field photos of orebodies and metallogenic structural planes

    图  5  白云金矿矿区矿体成矿结构面钻孔简图

    Figure  5.  Metallogenic structural plane maps of drill holes

    图  6  白云矿区围岩裂隙矿化和硅钾蚀变岩显微特征

    Qz一石英;Ce一方解石;Py一黄铁矿;Kfs一钾长石;Di—透辉石

    Figure  6.  Fractural mineralization in surrounding rocks and silicon-potassium altered features in the Baiyun mine

    图  7  白云矿区构造应力与含矿流体侵位模式图

    Figure  7.  The model of structural stress and ore-bearing fluids intrusion in the Baiyun mine

    图  8  成矿结构面力学分析简图

    Figure  8.  Mechanical analysis of metallogenic structural planes in the Baiyun mine

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