摘要
那更康切尔地区位于东昆仑造山带东段的沟里金矿田,为青海省首次发现的一处大型独立银矿床。随着银矿找矿工作向深部探索,开展钻孔原生晕预测深部找矿是目前较为直观且有效的方法。本研究通过系统采集那更康切尔银矿Ⅺ矿带0勘探线7个钻孔919件样品进行地球化学测试,分析了Au、Ag、Cu、Pb、Zn、W、Sn、Mo、As、Sb、Hg、F、Mn、Bi、Co等15种元素。用聚类分析方法研究了元素组合特征,运用格里戈良法研究了原生晕分带特征。结果表明,矿体自上而下原生晕轴向分带序列为Au→Hg→Ag→Mo→Mn→Sn→Sb→As→Pb→Zn→W→Bi→Cu→F→Co,总结了矿床异常元素的分带规律,确定成矿近矿晕元素为Ag、Pb、Zn、Au、Sb、Sn、Cu,前缘晕元素为Hg、As、(F),尾晕元素为Mo、Co、Mn、(Bi)、(W)。且存在前缘晕、近矿晕和尾晕元素相叠加的特征,以及异常向深部延伸未显示歼灭的现象,说明矿体深部沿轴向仍有延伸,结合物化探特征,并与区域矿床对比研究分析认为,Ⅺ矿带北延部分矿体向深部仍有延伸,深部找矿潜力较大。
Nagengkangqieer area is located in the Gouli Gold Orefield in the eastern segment of the East Kun-lun orogenic belt.It is the first large independent silver deposit discovered in Qinghai province.As exploration for silver minerals delves deeper,analyzing drilling primary halos to predict deep-seated mineralization stands as a current direct and effective method.In this study,We systematically collected 919 samples from 7 drill holes within theⅪmineralized belt of the Nagengkangqieer silver deposit,and analyzed 15 elements including Au,Ag,Cu,Pb,Zn,W,Sn,Mo,As,Sb,Hg,F,Mn,Bi,Co.Cluster analysis was utilized to examine element combi-nation features while the Grigoriev method was employed to study primary halo zoning characteristics.The re-sults revealed an axial zoning sequence of the primary halo from surface to a depth is:Au→Hg→Ag→Mo→Mn→Sn→Sb→As→Pb→Zn→W→Bi→Cu→F→Co.We summarized zoning patterns of abnormal elements within the deposit and identified Ag,Pb,Zn,Au,Sb,Sn,and Cu as near-mine halo elements;Hg,As,and(F)as frontier-halo elements;Mo,Co,Mn,(Bi),and(W)as tail-halo elements.There are characteristics of near-mine halo,frontier-halo and tail-halo elements overlapping,as well as no signs of extermination in the deep part of the anomaly,indicating that the mineral body has further extension along the axis in the deep part.Combined with geophysical and geochemical characteristics,and compared with regional mineral deposits,it is believed that the mineralized body in the northern extension of theⅪmineral belt extends further into the depths,and there is great potential for deep-seated mineral exploration.
作者
于小亮
王成勇
李杰
马财
董基恩
李华
李向军
康波
魏小林
YU Xiaoliang;WANG Chengyong;LI Jie;MA Cai;DONG Jien;LI Hua;LI Xiangjun;KANG Bo;WEI Xiaolin(Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academyof Sciences,Beijing 100049,China;Qinghai Provincial Geological Survey Bureau,Technology Innovation Center forExploration and Exploitation of Strategic Mineral Resources in Plateau Desert Region,Ministry of Natural Resources,Xining 810001,Qinghai,China)
出处
《西北地质》
北大核心
2025年第3期221-235,共15页
Northwestern Geology
基金
青海省地质勘查基金项目“青海省柴周缘主要矿集区矿产资源深部勘查方法技术示范研究”(2021074008ky008)
“青海省重要矿集区深部找矿突破示范”(2023085029ky004)
“昆仑-阿尔金金锰铁区域成矿规律与智能找矿预测”(2024ZD1001800)联合资助。
关键词
那更康切尔银矿
原生晕
元素组合特征
轴向分带序列
深部预测
Nagengkangqieer silver deposit
primary halo
element combination characteristics
axial zona-tion sequence
prediction for mineral exploration in depth
