激电中梯剖面测量在青海大格勒沟脑地区金矿勘查中的应用  

Application of Polarization Intermediate Gradien Survey in Gold Exploration of Dagelegounao Area

作　　者：漆亮 党志刚 苗虎林 杨和平 何健廷 QI Liang;DANG Zhi-gang;MIAO Hu-lin;YANG He-ping;HE Jian-ting(Qinghai SDIC Mining Investment Co.,Ltd.,Xining 810000,Qinghai,China;Qinghai SDIC Guangyuan Mining Co.,Ltd.,Xining 810000,Qinghai,China;Qinghai Danxin Mining Consulting Co.,Ltd.,Xining 810000,Qinghai,China;Qinghai Shian Mining Exploration and Development Co.,Ltd.,Xining 810000,Qinghai,China)

机构地区：[1]青海国投矿业投资有限责任公司,青海西宁810000 [2]青海国投广源矿业有限公司,青海西宁810000 [3]青海丹信矿业咨询有限公司,青海西宁810000 [4]青海世安矿业勘查开发有限公司,青海西宁810000

出　　处：《中国钼业》2022年第2期36-40,共5页China Molybdenum Industry

基　　金：中国地质调查局项目(1212011140113)。

摘　　要：大格勒沟脑地区地处东昆仑南坡俯冲增生杂岩带,该区海拔较高,虽成矿地质条件优越但探矿工程不易展开,矿体多由单工程控制,矿体评价不准确。为缩小找矿靶区、确定成矿有利地段和间接指导寻找盲矿体,于区内开展了1∶5000激电中梯剖面测量、异常圈定解译和验证工作。研究发现,大格勒沟脑地区岩、矿石间存在物性差异,具备开展物探工作条件,且低阻高极化、高阻中极化异常特征是重要找矿特征;圈定的8处激电异常,呈近北东向带状分布,总体上呈现低阻中极化特征,且探槽和钻探验证效果良好,激电中梯剖面测量工作在大格勒沟脑地区金矿勘查工作中行之有效。Dagelegounao area is located in the subduction-accretion complex belt on the southern slope of East Kunlun.Due to the high altitude,although the metallogenic geological conditions are superior,it is difficult to carry out prospecting engineering,and the orebodies are mostly controlled by single engineering,and the evaluation of orebodies is not accurate.In order to narrow the prospecting target area,determine the favorable ore-forming area and indirectly guide the search for blind orebodies,the 1∶5000 polarization intermediate gradien survey,anomaly delineation interpretation and verification were carried out in the area.It is found that the difference of physical properties between rocks and ores in Dagelegounao area provid the conditions for geophysical exploration,and the characteristics of low-resistance high-polarization and high-resistance medium-polarization anomaly are important prospecting characteristics;8 anomalies delineated are distributed in a nearly NE-oriented zonal direction,and generally present the characteristics of low-resistance medium-polarization,and the exploration groove and drilling verification results are good.The work of polarization intermediate gradien survey is effective in gold prospecting in Dagelegounao area.

关 键 词：激电中梯剖面测量 异常圈定 异常解译 异常验证 大格勒沟脑地区 

分 类 号：P618.51[天文地球—矿床学]