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黄金科学技术 ›› 2023, Vol. 31 ›› Issue (3): 443-452.doi: 10.11872/j.issn.1005-2518.2023.03.156

• 矿产勘查与资源评价 • 上一篇    下一篇

地电化学勘查法在山西五台地区代银掌金多金属矿的试验研究

郭焕钊1(),康明1(),朱文德2,王棚伟2,段杰凯2   

  1. 1.长安大学地球科学与资源学院,陕西 西安 710054
    2.山西省地质勘查局二一二地质队,山西 长治 046000
  • 收稿日期:2022-10-24 修回日期:2022-12-20 出版日期:2023-06-30 发布日期:2023-07-20
  • 通讯作者: 康明 E-mail:2205477221@qq.com;kangmin@chd.edu.cn
  • 作者简介:郭焕钊(1996-),男,陕西宝鸡人,硕士研究生,从事地质学研究工作。2205477221@qq.com
  • 基金资助:
    长安大学科研创新发展基金项目“地电化学勘查法在山西五台地区找矿预测试验研究——以五台县代银掌金多金属矿区为例”(600303006821)

Experimental Study on Geoelectrochemical Exploration Method in Daiyin-zhang Gold Polymetallic Deposit in Wutai Area,Shanxi Province

Huanzhao GUO1(),Ming KANG1(),Wende ZHU2,Pengwei WANG2,Jiekai DUAN2   

  1. 1.School of Earth Science and Resources, Chang’an University, Xi’an 710054, Shaanxi, China
    2.212 Geological Team of Shanxi Provincial Geological Prospecting Bureau, Changzhi 046000, Shanxi, China
  • Received:2022-10-24 Revised:2022-12-20 Online:2023-06-30 Published:2023-07-20
  • Contact: Ming KANG E-mail:2205477221@qq.com;kangmin@chd.edu.cn

摘要:

为了解决山西五台县代银掌矿区周边及深部找矿问题,在矿区选取6号、8号和12号3条勘探线剖面开展了地电化学方法试验研究,对通电(偶极地电提取)和不通电(泡塑吸附提取)条件下的地电化学方法试验进行了对比分析,验证了该方法在代银掌金多金属矿区找矿中的可行性以及外加电场对勘探效果的影响。研究结果表明:地电化学提取异常在已知金矿体上方显示清晰,与金矿体的赋存位置对应良好,勘探效果显著,说明在山西五台地区运用地电化学方法寻找隐伏金矿床是有效可行的。外加电场确实提高了地电化学提取效率,探测深度也大于不通电下的吸附提取,更加灵敏,对隐伏矿体和弱矿化异常都能有明显显示,异常与深部矿体的赋存位置对应度较高,提取到的矿体信息更加全面完整,对进一步分析地下矿体位置和展布形态有很好的效果,在深部找矿预测中可起到较好的指示效应。

关键词: 金多金属矿, 地电提取法, 泡塑吸附法, 异常特征, 五台地区, 山西省

Abstract:

In order to solve the problem of prospecting around and deep prospecting in Daiyinzhang mining area in Wutai County,Shanxi Province,the geoelectrochemical exploration method was carried out in the sections of three profiles 6,8 and 12 lines in the mining area,and the geoelectrochemical exploration method test under the conditions of energization (dipolar geoelectric extraction) and non-energization (foam-plastic adsorption extraction) was compared and analyzed in order to verify the feasibility of the method in the area and the influence of the applied electric field on the exploration effect.The results show that the geoele-ctrochemical extraction anomaly is clearly displayed above the known gold orebody,which corresponds well to the occurrence location of the gold orebody,and the exploration effect is remarkable,and it is effective and feasible to use geoelectrochemical methods to find hidden gold deposits in Wutai area of Shanxi Province.The applied electric field does improve the efficiency of geoelectrochemical extraction,the detection depth is also greater than the adsorption extraction without electricity,which is more sensitive,and it can clearly show the hidden orebody and weak mineralization abnormality.The anomaly corresponds to the burial location of the deep orebody,and the extracted orebody information is more comprehensive and complete,which has a good effect on further analysis of the location and distribution form of the underground orebody,and it can play a good indicator effect in deep prospecting prediction.

Key words: gold polymetallic deposit, electrogeochemical extraction method, foam-plastic adsorption extraction method, abnormal characteristics, Wutai area, Shanxi Province

中图分类号: 

  • P618.51

图1

五台地区构造纲要及金矿(床)点分布简图(修改自田永清等,1999)1.滹沱群;2.五台群上亚群变沉积岩;3.五台群下亚群火山—沉积岩系;4.五台群下亚群上部含铁岩系;5.五台群下亚群下部含铁岩系;6.阜平岩群;7.吕梁期花岗岩;8.五台晚期花岗岩;9.五台早期花岗—片麻岩(TTG杂岩);10.晚期断层;11.剪切变形带:a.剖面图中,b.地质图中;12.F1褶皱轴迹;13.F2褶皱轴迹;14.F3褶皱(吕梁期)轴迹;15.金矿床及编号;16.金矿点及编号矿床(点)名称:①-东腰庄金矿;②-狐狸山金矿;③-殿头金矿;④-小板峪金矿;⑤-康家沟金矿;⑥-代银掌金矿;⑦-上扬花金矿;⑧-小中咀金矿;⑨-柏枝岩金矿点;⑩-大西沟金矿点;?-张仙堡金矿点;?-七图金矿;?-西山底金矿点;?-刘家坪金矿点"

图2

代银掌矿区地质简图及剖面布置图1.第四系沉积物;2.五台群柏枝岩组绿泥片岩;3.五台群柏枝岩组绢云变质粉砂岩;4.五台群柏枝岩组绢云片岩;5.吕梁期变质辉绿岩;6.五台期斜长花岗岩;7.金矿体及编号;8.金矿化体及编号;9.地电化学试验剖面位置及编号;10.地电化学采样点位置及编号;11.钻孔位置及编号"

表1

地电提取和泡塑吸附Au异常特征值"

剖面编号方法样品数/个最高值/(ng·g-1中位数/(ng·g-185%分位数/(ng·g-1算术平均值/(ng·g-1标准离差变异系数
6号正极提取2017.98.110.858.83.10.36
负极提取2043.96.312.069.29.00.99
吸附提取199.84.07.515.02.00.41
8号正极提取2017.05.59.707.03.40.48
负极提取2013.67.79.877.72.50.32
吸附提取1913.62.94.503.82.50.68
12号正极提取2010.74.97.895.62.20.40
负极提取2021.67.912.729.75.00.51
吸附提取1920.44.05.105.34.70.88

图3

代银掌矿区6号勘探线地电提取和泡塑吸附Au异常剖面图1.绿泥片岩;2.绢云片岩;3.辉绿岩;4.斜长花岗岩;5.矿化体;6.矿体;7.钻孔位置及编号"

图4

代银掌矿区8号勘探线地电提取和泡塑吸附Au异常剖面图1.绿泥片岩;2.绢云片岩;3.辉绿岩;4.斜长花岗岩;5.矿化体;6.矿体;7.钻孔位置及编号"

图5

代银掌矿区12号勘探线地电提取和泡塑吸附Au异常剖面图1.绿泥绢云片岩;2.绢云片岩;3.绿泥绢云千糜岩;4.绢云千糜岩;5.斜长花岗岩;6.第四系残坡积物;7.矿化体;8.矿体"

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