摘要
随着近20年的铅锌矿业开发,陕西凤太矿集区各大中型矿山将面临资源枯竭的困境。甘肃西成矿集区近年通过物探方法寻找到郭家沟隐伏铅锌矿体,表明物探方法对于深部找矿意义重大。从地质和地球物理角度综合研究,以凤太矿集区古岔河向斜为界,总结了南、北两侧的铅硐山—东塘子、银硐梁、八方山—二里河等大型铅锌矿床,手搬崖、峰崖、黑崖、银母寺等中型铅锌矿床以及多处小型矿床和矿点的铅锌矿体产出特征、形态特征及其赋存特征、控矿因素、物探识别标志。以银母寺铅锌矿床深部广域电磁法异常验证见到含铜矿化体,杨家湾铜矿点深部瞬变电磁法异常验证见到铜矿体,及二里河铅锌矿床深部短偏移距瞬变电磁法推断出寻找铅锌矿较好地段等3种地球物理方法技术的深部找矿实例,结合铅锌矿的空间分布规律,认为矿集区内铅硐山—水柏沟背斜西段、尖端山—八方山背斜东段、银母寺—大黑沟背斜西段等已知矿床的深部延伸部位,及含矿背斜旁侧更次一级具有找矿潜力的隐伏背斜成矿有利新区(如铅硐山—水柏沟背斜西段两侧区域、银母寺—大黑沟背斜西段两侧区域、尖端山—八方山背斜两侧区域)为铅锌矿地球物理找矿方向。同时,综合比较各种物探方法在凤太矿集区中的应用,建议选用长剖面或面积性的广域电磁法开展深部找矿。
With the development of Pb-Zn mining industry in recent 20 years,the large-and medium-sized mines in Fengtai ore-gathering area will soon face the plight of resource depletion.In recent years,geophysical exploration method was used to find Guojiagou concealed Pb-Zn orebody in Xicheng ore-gathering area of Gansu,which indicates that it is of great significance to the deep prospecting by geophysical exploration method.According to the perspective of geological and geophysical exploration,taking the north and south sides of Guchahe syncline in Fengtai ore-gathering area as the boundary,the occurrence characteristics,morphological characteristics,ore controlling factors and geophysical identification marks of Pb-Zn orebodies were summarized,including Qiandongshan-Dongtangzi,Yindongliang,Bafangshan-Erlihe and other large-sized Pb-Zn deposits,Shoubanya,Fengya,Heiya,Yinmusi and other medium-sized Pb-Zn deposits,and several small deposits and ore spots.Based on the deep prospecting results of three geophysical methods,including the discovery of Cu mineralized bodies in the deep part of Yinmusi Pb-Zn deposit by WFEM,the discovery of Cu bodies in the deep part of Yangjiawan Cu ore spots by TEM,and the inference of a better location for Pb-Zn prospecting in the deep part of Erlihe Pb-Zn deposits by SOTEM,combined with the spatial distribution of Pb-Zn deposits,it can be considered that the deep extension parts of known deposits(such as the western section of Qiandongshan-Shuibaigou anticline,the eastern section of Jianduanshan-Bafangshan anticline,and the western segment of Yinmusi-Daheigou anticline)and new favorable areas for mineralization of sub-hidden anticline in the sidewall of ore-bearing anticline with ore-prospecting potential(such as the areas on both sides of the western segment of Qiandongshan-Shuibaigou anticline and Yinmusi-Daheigou anticline,and both sides of Jianduanshan-Bafangshan anticline),are the geophysical prospecting directions of Pb-Zn deposits.Meanwhile,based on the comprehensive comparison of the application of geophysical exploration methods in Fengtai ore-gathering area,it is suggested that WFEM with long section or wide area should be used for deep prospecting.
作者
王备战
王瑞廷
王宏宇
张革利
李青锋
WANG Bei-zhan;WANG Rui-ting;WANG Hong-yu;ZHANG Ge-li;LI Qing-feng(Xi an Northwest Non-ferrous Geophysical and Chemical Exploration Group Co.,Ltd.,Xi an 710068,Shaanxi,China;Northwest Nonferrous Geological and Mining Group Co.,Ltd.,Xi an 710054,Shaanxi,China;School of Earth Science and Resources,Chang an University,Xi an 710054,Shaanxi,China;Baoji No.717 Corps Limited of Northwest Nonferrous Geological and Mining Group,Baoji 721015,Shaanxi,China)
出处
《地球科学与环境学报》
CAS
北大核心
2020年第6期801-818,共18页
Journal of Earth Sciences and Environment
基金
中国地质调查局地质调查项目(DD20160052-13)
西北有色地质矿业集团有限公司科研项目。
作者简介
王备战(1970-),男,陕西富平人,高级工程师,E-mail:728567950@qq.com;通讯作者:王瑞廷(1969-),男,陕西杨凌人,西北有色地质矿业集团有限公司教授级高级工程师,博士研究生导师,理学博士,E-mail:wrtyf@163.com。
