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北山成矿带月牙山-老硐沟地区铜多金属矿床成矿预测

段海龙 陈耀 张青 张成 曹磊 刘玉国 田柯南

段海龙, 陈耀, 张青, 张成, 曹磊, 刘玉国, 田柯南. 北山成矿带月牙山-老硐沟地区铜多金属矿床成矿预测[J]. 地质科技通报, 2021, 40(5): 188-197. doi: 10.19509/j.cnki.dzkq.2021.0043
引用本文: 段海龙, 陈耀, 张青, 张成, 曹磊, 刘玉国, 田柯南. 北山成矿带月牙山-老硐沟地区铜多金属矿床成矿预测[J]. 地质科技通报, 2021, 40(5): 188-197. doi: 10.19509/j.cnki.dzkq.2021.0043
Duan Hailong, Chen Yao, Zhang Qing, Zhang Cheng, Cao Lei, Liu Yuguo, Tian Kenan. Metallogenic prediction of copper polymetallic deposit in the Yueyashan-Laodonggou area, Beishan Ore Belt[J]. Bulletin of Geological Science and Technology, 2021, 40(5): 188-197. doi: 10.19509/j.cnki.dzkq.2021.0043
Citation: Duan Hailong, Chen Yao, Zhang Qing, Zhang Cheng, Cao Lei, Liu Yuguo, Tian Kenan. Metallogenic prediction of copper polymetallic deposit in the Yueyashan-Laodonggou area, Beishan Ore Belt[J]. Bulletin of Geological Science and Technology, 2021, 40(5): 188-197. doi: 10.19509/j.cnki.dzkq.2021.0043

北山成矿带月牙山-老硐沟地区铜多金属矿床成矿预测

doi: 10.19509/j.cnki.dzkq.2021.0043
基金项目: 内蒙古自然资源厅勘查处综合预算项目"内蒙古北山成矿带金铜矿成矿关键问题研究及找矿预测"
详细信息
    作者简介:

    段海龙(1968-), 男, 高级工程师, 主要从事地质、地球物理、地球化学勘查工作。E-mail: 1434265702@qq.com

    通讯作者:

    陈耀(1996-), 男, 现正攻读地质工程专业硕士学位, 主要从事矿床学、成矿规律与成矿预测研究。E-mail: 1396826568@qq.com

  • 中图分类号: P618.41

Metallogenic prediction of copper polymetallic deposit in the Yueyashan-Laodonggou area, Beishan Ore Belt

  • 摘要: 月牙山-老硐沟地区位于北山成矿带东南部,区内前期找矿工作主要围绕金、钨等矿种展开,而对铜相关矿床的地质特征和成矿预测则少有涉及。以野外地质调查为基础,结合室内多元找矿信息提取和综合分析,对该区典型铜多金属矿床的地质特征、找矿模型、综合找矿信息等进行了系统研究并开展了成矿预测。研究结果表明:区内的铜多与铁、铅、锌等伴生,矿床受碳酸盐岩、海西-印支期中酸性岩体及北西-北西西向断裂共同控制,为典型的矽卡岩型铜多金属矿床;北西-北西西向断裂、高磁异常体、铜铅锌地球化学异常叠加部位为此类矿床的有利找矿地段。据此,本次工作共圈定了4个预测区(A1、A2、B1、C1),野外查证在其中A1和A2预测区内见较好矿化,为区内下一步的找矿勘查工作指明了方向。

     

  • 图 1  内蒙古月牙山-老硐沟地区地质矿产图

    Figure 1.  Geological map of the Yueyashan-Laodonggou in Inner Mongolia

    图 2  老硐沟矿区地质图(底图据文献[26]修改)

    1.第四系冲积物;2.蓟县系-青白口系平头山组;3.长城系古硐井群;4.闪长玢岩;5.辉绿岩;6.花岗闪长岩;7.黑云二长花岗岩;8.花岗细晶岩;9.矿化蚀变带;10.矿体;11.断层及编号;12.性质不明断层;13.矽卡岩化

    Figure 2.  Geological map of the Laodonggou Deposit area

    图 3  老硐沟铜铁多金属矿床矿化和蚀变特征

    A.Ⅲ矿段构造带;B.Ⅲ矿段内顺面理发育的黄铁矿;C.条带状展布的绿帘石;E, F.晚期矽卡岩阶段的绿泥石化、绿帘石化;G, H, I.氧化物阶段的磁铁矿,可见晚期硫化物阶段的石英-方解石脉穿插;J, K, L.早期硫化物阶段的黄铁矿、方铅矿

    Figure 3.  Mineraliszation and alteration characteristics of the Laodonggou copper and iron polymetallic deposit

    图 4  梭梭井铜多金属矿床矿化和蚀变特征

    A.断裂接触带;B.氧化的铜矿体;C.早期矽卡岩阶段的石榴石;D, E.晚期矽卡岩阶段的绿泥石、绿帘石、透闪石;F.绿帘石中充填氧化物阶段的磁铁矿;G.磁铁矿中充填早期硫化物阶段的黄铜矿;H, I.早期硫化物阶段的黄铁矿、黄铜矿及方铅矿

    Figure 4.  Mineralisation and alteration of polymetallic ore of the Suosuojing copper polymetallic deposit

    图 5  研究区矽卡岩型铜多金属矿床找矿模型

    1.二长花岗岩; 2.大理岩; 3.矿体; 4.碳酸盐化; 5.断层; 6.绿泥石化; 7.黄铁矿化

    Figure 5.  Prospecting model of the skarn-type copper polymetallic deposits of the study area

    图 6  月牙山-老硐沟地区化极总水平梯度等值线与综合推断断裂及高磁性体解译图

    Figure 6.  Interpretation diagram of synthetic inference fault and highly magnetic body of the Yueyashan-Laodonggou area

    图 7  月牙山-老硐沟地区水系沉积物测量Co-Cr-Ni-Cu-Zn因子得分图

    Figure 7.  Co-Cr-Ni-Cu-Zn factor score contour of the Yueyashan-Laodonggou area based on geochemical data

    图 8  月牙山-老硐沟地区找矿靶区图

    Figure 8.  Prospecting target areas of the Yueyashan-Laodonggou area

    表  1  研究区化探元素统计特征

    Table  1.   Statistical characteristics of geochemical elements in the study area

    Ag Au Mo Pb Cu W Zn
    wB/10-9 wB/10-6
    平均值 83 1.62 1.46 15.95 17.40 1.96 40.39
    异常下限 109 1.36 2.37 38.56 10.20 3.62 39.01
    分析值范围 11~13 531 0.2~1 250 0.1~69.4 1.3~2 404 1.3~404 0.12~462 3.9~1 168
    下载: 导出CSV
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