青海东昆仑大格勒东地区物化探特征及找矿前景  

Geophysical and Geochemical Characteristics and Prospecting Prospects in the Dagele East Region of East Kunlun in Qinghai Province

作　　者：梅铁牛 王永纪 胡伟 MEI Tieniu;WANG Yongji;HU Wei(Henan Third Geological Brigade Company Limited,Zhengzhou,Henan 451464,China)

机构地区：[1]河南省第三地质大队有限公司,河南郑州451464

出　　处：《中国锰业》2023年第6期55-60,66,共7页China Manganese Industry

基　　金：青海省海西州2017年度财政两权价款矿产勘查项目(编号:青地调勘[2017]403)。

摘　　要：东昆仑大格勒东地区位于青海省柴达木盆地南缘,地处东昆中陆块-东昆中岩浆弧带,介于东昆中、东昆北两深断裂之间,区内断裂构造发育,岩浆活动强烈,区域成矿条件优越。为实现区内找矿突破,在研究区进行了激电中梯测量和岩石原生晕剖面测量。研究在成矿地质背景的基础上,对大格勒东地区物化探特征进行综合分析,结果表明物探基本与含矿蚀变破碎带吻合,化探Au异常主要集中在矿区北部Ⅺ-1含矿蚀变破碎带附近,说明研究区北部含矿蚀变破碎带蚀变作用较为强烈,但蚀变破碎带中Au含量很不均匀,Au异常不连续。分析认为北部的Ⅺ-1、Ⅺ-2号含矿蚀变破碎带在今后的找矿工作中,除了重视Au的找矿外,还应兼顾Pb的找矿信息。Dagele east region of east Kunlun is located on the southern edge of Qaidam Basin in Qinghai Province.It is located in the east Kunlun Middle Land Block east Kunlun Middle Magmatic Arc Zone,between the two deep faults of east Kunlun Middle and east Kunlun in the north.The fault structures in the area are well-developed,with strong magmatic activity and superior regional mineralization conditions.In order to achieve breakthroughs in ore exploration within the study area,the induced polarization gradient measurement and rock primary halo profile measurement were conducted.On the basis of the ore-forming geological background,this study conducted a comprehensive analysis of the geophysical and geochemical characteristics of the Dagele east region.The results showed that the geophysical exploration was basically consistent with the ore bearing alteration fracture zone,and the geochemical Au anomalies were mainly concentrated near the ore bearing alteration fracture zone in the northern part of the mining area,indicating that the alteration effect of the ore bearing alteration fracture zone in the northern part of the study area was relatively strong.However,Au content in the alteration fracture zone was very uneven and Au anomalies were discontinuous.The analysis suggests that in future ore exploration work in theⅪ-1 andⅪ-2 ore bearing altered and fractured zones in the north,in addition to emphasizing the exploration of Au.The consideration should be also given to the exploration information of Pb.

关 键 词：金矿 物化探异常 找矿前景 大格勒东 青海 

分 类 号：P631[天文地球—地质矿产勘探] P632[天文地球—地质学]