ISSN 1009-6248CN 61-1149/P 双月刊

主管单位:中国地质调查局

主办单位:中国地质调查局西安地质调查中心
中国地质学会

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    西秦岭凤太铅锌矿集区成矿特征、找矿预测及勘查方法技术组合

    Metallogenic Characteristics, Prospecting Prediction and Exploration Methods Combination of Fengtai Pb−Zn Orefield, West Qinling

    • 摘要: 基于西秦岭凤太矿集区铅锌矿床矿体的产出受背斜构造、地层、特定岩性层位控制,主要铅锌矿床随控矿背斜构造的倾伏,铅锌矿成矿特征从出露到完全隐伏的认识,依据区内铅锌矿床成矿模式和找矿标志研究,把铅锌找矿有利地段分为已知矿体的延深部位、已知矿体深部(或周边)的未知矿体、暂无已知矿床的新区共3类。通过工作,预测提出八方山−二里河铅锌矿床深部、白杨沟−洞沟铅锌矿带、银洞梁−手搬崖铅锌矿床深部和铅硐山−东塘子铅锌矿床深部等4个找矿靶区,找矿靶位的预测聚焦于4个找矿靶区内已知铅锌矿床走向延伸与倾向延深部位、矿床两翼深部对赋矿有利的褶曲部位。近年来的找矿实践证明,地质综合研究、构造叠加晕找矿法、以广域电磁法为主的大探测深度物探方法以及深部探矿工程验证是该矿集区深部铅锌找矿的有效勘查方法技术组合。

       

      Abstract: Based on the understanding that the occurrence of Pb−Zn ore bodies in Fengtai orefield of west Qinling is dominated by anticline structure, strata and specific lithologic horizon, and that the main Pb−Zn deposit exhibit a certain inclination with the ore−controlling anticline, the metallogenic characteristics of Pb−Zn deposits are from outcrop to completely concealed, based on the study on metallogenic model and prospecting criteria of Pb−Zn deposits in the region, the favorable areas for Pb−Zn ore prospecting can be divided into three types: the extension part of the known orebodies, the unknown orebodies in the deep part (or its periphery) of the known orebodies, and the new area without the known ore deposit.Through the work, four prospecting target areas are predicted: in the deep part of the Bafangshan−Erlihe Pb−Zn deposit, the Baiyanggou−Donggou Pb−Zn belt, the deep part of the Yindongliang−Shoubanya Pb−Zn deposit and the deep part of the Qiandongshan−Dongtangzi Pb−Zn deposit. The prediction of prospecting target is focused on the stretch and dip of known Pb−Zn deposits in the four prospecting target areas, and the fold of two deep flanks of the deposits. The practice of prospecting in recent years has proved that, comprehensive geological research, structural superimposed halo prospecting, wide−area electromagnetic prospecting and verification of deep prospecting engineering are the effective exploration methods and techniques combination for deep Pb−Zn deposits in this ore−concentrated area.

       

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