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黄金科学技术 ›› 2022, Vol. 30 ›› Issue (4): 498-507.doi: 10.11872/j.issn.1005-2518.2022.04.009

• 矿产勘查与资源评价 • 上一篇    下一篇

高密度电法在北巴颜喀拉山夺尔贡玛锑金矿点找矿中的应用

马德锡1(),任喜荣2(),宋炯1,张保卫1   

  1. 1.中国地质调查局地球物理调查中心,河北 廊坊 065000
    2.甘肃省地质矿产勘查开发局第二地质勘查院,甘肃 兰州 730000
  • 收稿日期:2021-12-28 修回日期:2022-03-29 出版日期:2022-08-31 发布日期:2022-10-31
  • 通讯作者: 任喜荣 E-mail:626385001@qq.com;rxr5894091@163.com
  • 作者简介:马德锡(1976-),男,甘肃灵台人,正高级工程师,从事地球物理调查及研究工作。626385001@qq.com
  • 基金资助:
    中国地质调查局基础地球物理地球化学调查项目“酒泉—武威地区区域地球物理调查”(ZD20220505)

Application of High Density Electrical Method in Prospecting for Duoguma Antimony Gold Ore Spot in North Bayan Har Mountains

Dexi MA1(),Xirong REN2(),Jiong SONG1,Baowei ZHANG1   

  1. 1.Geophysical Survey Center, China Geological Survey, Langfang 065000, Hebei, China
    2.Second Geological Exploration Institute of Gansu Bureau of Geology and Mineral Resources, Lanzhou 730000, Gansu, China
  • Received:2021-12-28 Revised:2022-03-29 Online:2022-08-31 Published:2022-10-31
  • Contact: Xirong REN E-mail:626385001@qq.com;rxr5894091@163.com

摘要:

为了解决制约夺尔贡玛锑金矿区找矿突破(如控矿因素、矿床成因)的问题,采用高密度电法对玛多县夺尔贡玛一带1/20万AS41Sb(Au)水系沉积物异常及1/5万Au、As、Sb水系沉积物异常进行检查,重点对夺尔贡玛锑金矿点及外围进行面积性探测。平面电阻率异常表明,区域性NW向昆仑山口—玛多—甘德—久治断裂在该区被NE向后期断裂错断改造;2组断裂交会部位叠加有高值充电率(极化率)异常,异常长轴方向与区域构造走向一致,主要分布在构造倾向一侧;结合电阻率断面异常,认为这些分布广且强度大的异常主要分布在区域构造与围岩接触带上。此外,优选与锑、金等多金属元素化探异常套合的充电率(极化率)异常作为找矿靶区进行工程验证,经槽探工程揭露了锑金矿体,实现了新的找矿突破。

关键词: 锑金矿点, 控矿因素, 矿床成因, 高密度电法, 夺尔贡玛, 北巴颜喀拉山

Abstract:

In order to solve the problem that restrict the breakthrough of prospecting(such as ore controlling factors and deposit genesis) in Duoguma antimony gold mining area, the 1∶200 000 As41Sb (Au) stream sediment anomaly and 1∶50 000 Au、As、Sb stream sediment anomaly in Duoguma area of Maduo County were examined by high-density electrical method, and the North Duoguma antimony gold mining point and its periphery were mainly detected.The plane resistivity anomaly shows that the regional NW trending Kunlun Mountain pass Maduo-Gande-Jiuzhi fault is transformed by the later NE trending fault dislocation in this area.High value charge rate (polarizability) anomalies are superimposed at the intersection of the two groups of fault structures. The long axis direction of these anomalies is consistent with the trend of regional structure, and the location is mainly distributed on the side of structural tendency.Combined with the analysis of resistivity section anomalies, these widely distributed and strong anomalies are mainly distributed in the contact zone between regional structure and surrounding rock. The charging rate (polarizability) anomaly combined with the anomaly of polymetallic elements such as antimony and gold in geochemical exploration is selected as the prospecting target for engineering verification.The antimony gold orebody is revealed through trenching engineering, realizing the prospecting breakthrough of the polymetallic prospecting target.

Key words: antimony gold mine, ore-controlling factor, genesis of deposit, high density electrical method, Duoguma, North Bayan Har Mountains

中图分类号: 

  • P618.51

图1

区域地质图1.石炭纪—中二叠世布青山群;2.早三叠世昌马河组下段;3.早三叠世昌马河组上段;4.古近纪雅西措组;5.早—中三叠世下大武组;6.中三叠世甘德组;7.晚三叠世清水河组下段;8.第四纪更新世砾岩、砂砾岩夹砂岩;9.第四纪更新世冰水堆积的砂砾石层;10.第四纪全新世腐植泥、黏土和粉砂沼泽沉积;11.具构造分区意义的断裂带;12.成矿区带划分边界;13.锑金矿点及编号;14.地球化学异常组合编号"

图2

夺尔贡玛测区地质概况及高密度电法工作部署图1.石炭纪—中二叠世布青山群;2.早三叠世昌马河组上段;3.早三叠世昌马河组中段;4.花岗岩岩体;5.锑矿化脉;6.锑金元素化探异常;7.具有分界意义的断裂;8.锑金矿化点;9.高密度电法测线"

图3

15线至24线高密度电法测量反演解释断面图"

图4

电阻率平面剖面解释图"

图5

充电率平面剖面异常投影图"

图6

电阻率异常趋势及推断断裂展布图"

图7

夺尔贡玛地质构造模式示意图1.石炭纪—中二叠世布青山群;2.早三叠世昌马河组上段;3.早三叠世昌马河组中段;4.花岗岩岩体;5.锑金矿点;6.区域构造线"

图8

电阻率和充电率综合异常平面投影图1.石炭纪—中二叠世布青山群;2.早三叠世昌马河组上段;3.早三叠世昌马河组中段;4.花岗岩岩体;5.锑矿化脉;6.锑金元素化探异常;7.具有分界意义的断裂;8.锑金矿化点;9.高密度电法测线;10.充电率(极化率)平面异常投影"

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