瞬变电磁法在四川盐源大草深部隐伏铅锌矿探测中的应用  

Application of TEM in the detection of concealed lend-zinc deposit in the deep part of Dacao area,Yanyuan County,Sichuan Province

作　　者：罗发科 卢卯 LUO Fake;LU Mao(Guizhou Nonferrous Metal and Nuclear Industry Geological Exploration Bureau,Guiyang 550005;Institute of Geology and Mineral Resources Exploration of Guizhou Nonferrous Metal and Nuclear Industry Geological Exploration Bureau,Guiyang 550005)

机构地区：[1]贵州省有色金属和核工业地质勘查局,贵阳550005 [2]贵州省有色金属和核工业地质勘查局地质矿产勘查院,贵阳550005

出　　处：《矿产勘查》2020年第6期1197-1204,共8页Mineral Exploration

摘　　要：大草铅锌矿地处四川省盐源县大草乡,地理坐标:东经101°08’57″~101°09’42″,北纬27°35’02″~27°35’22″,主要赋存在三叠系中统白山组(T2b)白云质灰岩、泥质灰岩层间破碎带中,受地层层位和构造双重控制。通过开展1∶2000地面瞬变电磁法工作,圈出了3个TEM异常,其中南区的①号和②号异常在8线至6线间与已施工的3号坑道见矿情况相吻合,为铅锌矿致异常;北区的③号异常的瞬变电磁响应及地质特征与南区相似,推测为待验证的铅锌矿致异常,异常的发现为后续坑道设计施工提供了物探信息。Dacao lead-zinc deposit is located in Dacao area,Yanyuan county,Sichuan Province. Geographical coordinates east longitude 101°08’57″-101°09’42″,north latitude 27°35’02″-27°35’22″. It mainly occurs in the interbedded fracture zone of dolomitic limestone and Argillaceous limestone in the middle Triassic of Yanchang Formation of Baishan Group. By carrying out the work of 1 ∶2000 ground transient electromagnetic method,three TEM anomalies were circled. No.(1) anomaly and No.(2) anomaly in the south area are consistent with the ore condition of no. 3 tunnel under construction between line 8 and line 6,It is lead-zinc ore abnormal;The transient electromagnetic response and geological characteristics of No.(3) anomaly in the north region are similar to those in the south region. It is speculated that the abnormaly of lead-zinc deposit which need to be verified. The discovery of anomalies provides geophysical information for the subsequent design and construction of the tunnel and adds confidence for the mine to expand production.

关 键 词：铅锌矿 物探 瞬变电磁法 盐源 四川 

分 类 号：P618.42[天文地球—矿床学] P618.43[天文地球—地质学]