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黄金科学技术 ›› 2020, Vol. 28 ›› Issue (6): 800-811.doi: 10.11872/j.issn.1005-2518.2020.06.044

• 矿产勘查与资源评价 • 上一篇    下一篇

贵州册亨县板年金矿多层次滑脱构造控矿及找矿预测

陈发恩1(),刘建中2,3(),王大福1,王泽鹏1,3,杨成富1,3,李俊海1,3,徐良易1,宋威方4   

  1. 1.贵州省地质矿产勘查开发局一O五地质大队,贵州 贵阳 550018
    2.贵州省地质矿产勘查开发局,贵州 贵阳 550004
    3.自然资源部基岩区矿产资源勘查工程技术创新中心,贵州 贵阳 550081
    4.贵州大学资源与环境工程学院,贵州 贵阳 550025
  • 收稿日期:2020-02-11 修回日期:2020-07-14 出版日期:2020-12-31 发布日期:2021-01-29
  • 通讯作者: 刘建中 E-mail:774781883@qq.com;2585364825@qq.com
  • 作者简介:陈发恩(1965-),男,贵州普定人,高级工程师,从事金矿地质找矿勘探工作。774781883@qq.com
  • 基金资助:
    国家自然科学基金联合项目“卡林型金矿成矿作用与预测”(U1812402);国家重点研发计划项目“深地资源勘查开采”(2017YFC0601500)

Ore-controlling and Prospecting Prediction of Multi-level Slippage Structure in Bannian Gold Deposit, Ceheng County, Guizhou Province

Fa’en CHEN1(),Jianzhong LIU2,3(),Dafu WANG1,Zepeng WANG1,3,Chengfu YANG1,3,Junhai LI1,3,Liangyi XU1,Weifang SONG4   

  1. 1.No. 105 Geological Party,Bureau of Geology and Mineral Exploration and Development of Guizhou Province,Guiyang 550018,Guizhou,China
    2.Bureau of Geology and Mineral Exploration and Development of Guizhou Province,Guiyang 550004,Guizhou,China
    3.Engineering Technology Innovation Center of Mineral Resources Explorations in Bedrock Zones,Ministry of Natural Resources,Guiyang 550081,Guizhou,China
    4.Resource and Environmental Engineering College,Guizhou University,Guiyang 550025,Guizhou,China
  • Received:2020-02-11 Revised:2020-07-14 Online:2020-12-31 Published:2021-01-29
  • Contact: Jianzhong LIU E-mail:774781883@qq.com;2585364825@qq.com

摘要:

板年金矿位于南盘江—右江成矿区带北部赖子山矿田南部,矿田近SN向赖子山背斜及NE、NW向断裂控制着金矿的产出。野外地质调查及地球化学分析结果显示:矿区罗楼组或许满组与吴家坪组/礁灰岩、新苑组与安顺组之间的多层次滑脱构造与赖子山背斜耦合部位蚀变矿化明显,是成矿流体运移的主要通道和就位场所,其中多层次构造蚀变体是找矿主要目标层。区内大沟—册阳一带深部F1、F2断裂交会处和板纳—风堡一带深部F6断裂与背斜核部叠加处是找矿的最佳部位;背阴坡—石板井一带赖子山背斜北西翼次级背斜与F22断裂耦合部位,具有一定的找矿潜力。

关键词: 找矿预测, 多层次滑脱构造, 构造蚀变体, 板年金矿, 册亨县, 贵州省

Abstract:

The Bannian gold deposit is located in the southern part of the Laizishan orefield in the north of the Nanpanjiang-Youjiang metallogenic belt,and the gold deposit is controlled by the SN direction Laizishan anticline and the NE,NW fault in the mining area.According to the geological survey and geochemical analysis,the slip structure between the thick carbonate and thin clastic rocks is developed,the lower carbonate deformation is weak,and the upper clastic rocks are crushed and deformed strongly,forming an uncoordinated secondary folding faults are conducive to fluid migration and migration.Alteration and mineralization in the detachment structure zone and the fault are obvious.The detachment structure zone is the main channel of ore-forming fluid migration and the location of gold orebodies.The structural alteration bodies(SBT) formed by the metamorphic fluids in the Luolou Formation,Manchu/Wujiaping Formation,or reef limestone,Xinyuan Formation/Anshun Formation,are the main alterations in the area.Gold mineralization is the main target layer for prospecting in the area.Through comprehensive analysis,we conclude that the intersection of deep F1,F2 faults in Dagou-Ceyang area and the superposition of deep F6 faults and anticlines in Banna-Fengbao area are the best ore prospecting sites.The coupling part of the secondary anticline and F22 faults in the north west wing of the Laizishan anticline in Beiyinpo-Shibanjing area has certain prospecting potential.

Key words: prospecting prediction, multi-level slippage structure, SBT, Bannian gold deposit, Ceheng County, Guizhou Province

中图分类号: 

  • P618.51

图1

册亨地区区域地质矿产图T1-2-中—下三叠统; P2-3-中—上二叠统;C2-上石炭统;1.地层界线;2.地层相变线;3.正断层和逆断层;4.平移断层;5.环状断层;6.背斜和向斜;7. 台地碳酸盐岩;8.盆地碎屑岩;9.超大型金矿;10.大型金矿;11.中小型金矿;12.锑矿点;13汞矿点;14.研究区位置"

图2

册亨县板年金矿地质矿产图(据文献[1]修改)1.中三叠统许满组;2.中三叠统新苑组;3.中—下三叠统安顺组;4.中—下三叠统罗楼组;5.上二叠统礁灰岩;6.上二叠统吴家坪组;7.中二叠统茅口组;8.地层界线;9.地层相变线;10.正断层;11.逆断层;12.构造窗和飞来峰;13.背斜和向斜;14.硅化;15.金矿;16.地质剖面"

图3

中国南方卡林型金矿多层次构造滑脱成矿系统示意图(据文献[9]修编)T1-下三叠统;T2-中三叠统;T3-上三叠统;P1-下二叠统;P2-中二叠统;P3-上二叠统;C-石炭系;D-泥盆系;1.深部隐伏花岗岩体;2.深部断裂;3.构造蚀变体;4.金矿体;5.大气降水;6.地层水;7.变质水;8.深部流体"

图4

册亨县板年金矿构造热液蚀变特征Q-玉髓和石英;Orp-雌黄;Py-黄铁矿;Cal-方解石粒屑;Cal1-亮晶方解石胶结物;(a)雌黄铁矿化金矿石薄片;(b)黄铁矿化灰岩薄片;(c)F15断层硅化碎裂构造蚀变特征;(d)滑脱构造(F6)构造蚀变体镜下特征;(e)滑脱构造(F6)构造蚀变体露头特征;(f)滑脱构造(F5)构造蚀变体露头特征"

图5

册亨县板年金矿构造蚀变体柱状图"

图6

册亨县板年金矿A-B剖面图T2xm4-许满组四段;T2xm3-许满组三段;T2xy2-新苑组二段;T1-2a-安顺组;T1l-罗楼组;P3jh-礁灰岩;P3w-吴家坪组;P2m-茅口组;1.地层界线;2.逆断层;3.正断层;4.砂岩;5.黏土岩;6.灰岩;7.生物灰岩;8.泥灰岩;9.角砾岩;10.产状;11.构造蚀变体;12.金矿体"

表1

册亨县板年金矿矿石成分分析结果"

样品编号SiO2Al2O3Fe2O3TiO2K2ONa2OCaOP2O5MnO2LOSSFeO有机碳AuTS
LFDGH124.877.392.911.112.180.03131.730.220.07424.080.441.908.612.43
LFDGH225.867.381.481.382.250.03727.420.170.08724.982.701.550.591.34
LFDGH342.1613.7610.872.403.860.0467.720.410.1159.521.010.740.942.05
LFDGH482.928.881.920.550.820.0480.460.140.0183.710.280.070.460.27
LFDGH573.959.766.210.642.140.0950.370.160.0234.290.450.240.680.23
LFDGH666.098.914.620.380.710.0438.960.200.0409.590.200.030.920.07

图7

册亨县板年金矿矿石成分分析结果投图"

图8

册亨县板年金矿矿石SiO2与CaO相关关系图"

图9

册亨县板年金矿找矿预测地质模型1.断层;2.砂岩;3.粉砂质黏土岩;4.黏土岩;5.灰岩;6.泥灰岩;7.金矿体"

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