云南景谷县翁孔坝铜矿区地物化特征及找矿模型  

Geological,geophysical and geochemical characteristics and prospecting model of Wengkongba Copper District,Jinggu County,Yunnan Province

作　　者：雷印祥 常俊山 王付举 鹿峰宾 邓毅 郑玄 罗云平 Lei Yinxiang;Chang Junshan;Wang Fuju;Lu Fengbin;Deng Yi;Zheng Xuan;Luo Yunping(Shandong Gold Geology and Mineral Exploration Co.,Ltd.;Tancheng County Natural Resources and Planning Bureau;Yunnan Nonferrous Geological Bureau)

机构地区：[1]山东黄金地质矿产勘查有限公司 [2]郯城县自然资源和规划局 [3]云南省有色地质局

出　　处：《黄金》2023年第6期71-78,共8页Gold

基　　金：中国地质调查局项目(12120114044801)。

摘　　要：翁孔坝铜矿床为一典型火山沉积成岩成矿+构造叠加成矿的铜矿床。矿区内构造较为发育,主要为一系列近南北向褶皱和近南北向、东西向断裂,赋矿层位主要是宋家坡组,岩性为玄武质安山岩。通过开展1∶2万EH-4高频大地电磁测量和1∶5000大功率激电中梯剖面测量,圈定了3处找矿靶区;通过开展1∶1万高精度磁法测量和1∶1万激电中梯测量等物探工作,圈定了3处成矿有利区和1条成矿有利带,2次物探工作圈定的有利找矿靶区具有较好的套合性。在矿区南部开展1∶1万土壤地球化学测量,确定了2处甲类综合异常;在矿区北部开展次生晕剖面测量,圈定了1处甲类综合异常。通过综合分析矿区地质特征、地球物理特征、地球化学特征及矿床地质特征,结合物、化探异常和蚀变与矿化的关系,建立了找矿模型,利用该模型发现了可利用的工业铜矿体,为民乐地区该类型铜矿床的勘查积累了经验。Wengkongba Copper Deposit is a typical volcanic sedimentary diagenetic and metallogenic+tectonic superimposed metallogenic copper deposit.Tectonics is relatively developed,mainly a series of near-SN folds and near-SN and EW faults.The ore-bearing strata are mainly the Songjiapo formation,and the lithology is basaltic andesite.1∶20000 EH-4 high-frequency magnetotelluric survey and 1∶5000 high-power IP intermediate gradient profile survey were carried out,and 3 prospecting target areas were delineated;by carrying out geophysical prospecting work such as 1∶10000 high-precision magnetic survey and 1:10000 IP intermediate gradient survey,3 metallogenic favorable areas and 1 metallogenic favorable belt have been delineated.The favorable prospecting target areas delineated by the 2 pieces of geophysical prospecting work have good compatibility.The 1:10000 soil geochemical survey was carried out in the south of the mining area,and 2 Class A comprehensive anomalies were identified;the secondary halo profile survey was carried out in the north of the mining area,and 1 Class A comprehensive anomaly was determined.Through the comprehensive analysis of the geological characteristics,geophysical characteristics,geochemical characteristics,and deposit geological characteristics of the mining area,and based on the relationship between geophysical,geochemical anomalies and alteration,mineralization,a comprehensive geophysical and geochemical prospecting model is established.With this model,available industrial copper deposits are found in the mining area,which has accumulated experience for the exploration of this type of copper deposits in the Minle area.

关 键 词：地质特征 地球物理特征 地球化学特征 找矿模型 找矿方向 翁孔坝铜矿床 

分 类 号：TD15[矿业工程—矿山地质测量]