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地质力学学报:2019,25(1):9-18
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冀北地区龙头山铅多金属矿床的发现及地物化综合找矿模型的建立
(1.中国地质科学院地球物理地球化学勘查研究所, 河北 廊坊 065000;2.中国地质大学, 北京 100083;3.中国地质调查局, 北京 100037;4.河北地质职工大学地质工勘系, 河北 石家庄 050081;5.河北省地矿局第七地质大队, 河北 廊坊 065201)
THE APPLICATION OF THE INTEGRATED GEOLOGICAL, GEOPHYSICAL AND GEOCHEMICAL PROSPECTING METHOD IN THE DISCOVERY OF THE LONGTOUSHAN LEAD POLYMETALLIC DEPOSIT IN NORTHERN HEBEI PROVINCE
(1.Institute of geophysics and geochemical exploration, Chinese Academy of Geological Sciences, Langfang 065000, Hebei, China;2.China University of Geosciences, Beijing 100083, China;3.China Geological Survey, Beijing 100037, China;4.Department of Geology and Engineering Exploration, Hebei vocational college of geology, Shijiazhuang 050081, Hebei, China;5.The 7th geological Institute, Geology and Mineral Resources of Heibei Bureau, Langfang 065201, Hebei, China)
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投稿时间:2018-10-23    修订日期:2018-12-18
中文摘要: 隐伏矿是当前矿产地质勘查的重点对象。在综合研究冀北地区1∶20万区域示矿信息基础上,优选出锥子山花岗岩体一带的龙头山为找矿靶区,研究显示其具有较好的找矿潜力。1∶5万水系沉积物地球化学测量圈定出11处综合异常;其中H6异常属于矿致异常。H6异常经1∶1万地物化测量显示:Ag、Pb、Zn、Au等元素异常值高,具有外带—中带—内带三级分带;同时具有中低阻高极化的激电异常、蚀变矿(化)带与物化探异常相耦合的特征。通过进行系统地不同尺度地物化测量,缩小了找矿靶区,经工程验证发现了龙头山铅多金属矿床。矿体赋存在北西西向延伸、宽30~60 m的龙头山(F3)断裂构造系统中、产状较陡,赋矿围岩为太古界单塔子群(花岗)片麻岩和晚侏罗世张家口组安山岩,矿石多为细脉—浸染状、致密块状构造,矿床特征与毗邻的小扣花营、牛圈等多金属矿床类似,属于中低温热液脉型铅多金属矿床。最后,根据大比例尺地物化示矿信息特征,厘定了热液脉型铅多金属矿床的找矿标志,建立了地物化综合找矿模型,有利于推进冀北地区的找矿勘查。
Abstract:Concealed ore is the key object of mineral exploration at present. Based on the 1:200000 regional prospecting information in northern Hebei province, the Longtoushan prospecting target around the Zhuizishan granite mass has good prospecting potential. 1:50000 geochemical survey of stream sediement delineates 11 comprehensive anomalies, among them, H6 anomaly is the mineral-induced anomaly. The results of the 1:10000 geological, geophysical and geochemical survey show that anomaly of Ag, Pb, Zn, Au and other elements have high outlier values, with three levels of zones from the outer zone, middle zone to the inner zone. It has the characteristics of low resistance and high polarization induced electrical anomaly. Altered and mineralized zones are coupled with geophysical and geochemical anomalies. Through systematic geophysical and geochemical survey of different scales and the engineering verification, the Longtoushan lead polymetallic deposit was discovered. Orebodies occur in the F3 fault system with NWW extending and 30~60 m wide. The wall rocks are the archean Dantazi group gneiss and late Jurassic Zhangjiakou group andesite. The ores are mostly vein-disseminated and dense block structured, and the deposit features are similar to the adjacent Xiaokouhuaying deposit, the Niujuan deposit and other polymetallic deposits, belonging to the medium-low temperature hydrothermal vein type lead polymetallic deposit. According to the characteristics of geological, geophysical and geochemical prospecting information, the integrated prospecting model is established and the prospecting indicators of hydrothermal vein type lead polymetallic deposits are determined, which is conducive to advancing the prospecting and exploration in northern Hebei province.
文章编号:     中图分类号:P632;P618.42    文献标志码:
基金项目:中国地质科学院基本科研业务费专项经费(YYWF201731)
引用文本:
王建,朱立新,马生明,周伟伟,陈风河,苏振华,贾志超.冀北地区龙头山铅多金属矿床的发现及地物化综合找矿模型的建立[J].地质力学学报,2019,25(1):9-18DOI:10.12090/j.issn.1006-6616.2019.25.01.002
WANG Jian,ZHU Lixin,MA Shengming,ZHOU Weiwei,CHEN Fenghe,SU Zhenhua,JIA Zhichao.THE APPLICATION OF THE INTEGRATED GEOLOGICAL, GEOPHYSICAL AND GEOCHEMICAL PROSPECTING METHOD IN THE DISCOVERY OF THE LONGTOUSHAN LEAD POLYMETALLIC DEPOSIT IN NORTHERN HEBEI PROVINCE[J].,2019,25(1):9-18DOI:10.12090/j.issn.1006-6616.2019.25.01.002

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