地质与资源2024，Vol.33Issue(6)：747-758,12.DOI:10.13686/j.cnki.dzyzy.2024.06.002
青海省南祁连阳康地区水系沉积物地球化学特征及成矿远景
GEOCHEMICAL CHARACTERISTICS AND METALLOGENIC PROSPECT OF STREAM SEDIMENTS IN YANGKANG AREA ON THE SOUTHERN SIDE OF QILIAN MOUNTAINS
摘要
Abstract
Yangkang area is located in the Hala Lake-Longmen Caledonian W-Au-Cu-Co metallogenic subbelt of Caledonian W-Sn-Au-Cu metallogenic belt on the southern side of Qilian Mountains,with dozens of metal deposits(occurrences)found in the metallogenic belt,which has a good polymetallic exploration prospect.A total of 5 polymetallic mineral occurrences or mineralization spots have been found in the area.Through the 1:50 000 stream sediment survey,the primary data of 20 elements in the area are analyzed,among which the abundances of 10 elements such as Au,As,Sb,W,Pb and Zn are higher than the average of the region,especially highly enriched in the metamorphic sandstone of Silurian Balonggar Formation.The statistical analysis of stream sediments shows that the enrichment coefficient(K)of Au is 2.14,with great variation coefficients of Au,Pb and W.The samples are classified into 4 subclusters by R-type cluster analysis,i.e.Ⅱ-1 of As-Sb-Mo,Ⅱ-2 of Bi-Sn-Rb-U,Ⅱ-3 of Ba and Ⅱ-4 of Ag-Pb.From the 48 delineated comprehensive anomalies,2 of Class A and 2 of Class B anomalies with good representativeness and exploration prospects are selected for emphasis discussion.According to the element distribution,element correlation and comprehensive anomaly characteristics,combined with the regional metallogenic background,3 metallogenic prospect areas are defined,namely the second-order Sereduolong Au-W metallogenic prospect area,second-order Duoergai Pb-Zn metallogenic prospect area and third-order Lamulong W-Cu-Au metallogenic prospect area.关键词
水系沉积物/地球化学特征/成矿远景/南祁连/青海省Key words
stream sediment/geochemistry/metallogenic prospect/Qilian Mountains/Qinghai Province分类
天文与地球科学引用本文复制引用
李东,李铁笔,郑月,孙中行,姜克楠,潘建..青海省南祁连阳康地区水系沉积物地球化学特征及成矿远景[J].地质与资源,2024,33(6):747-758,12.基金项目
青海省国土资源厅地勘基金项目"青海省天峻县阳康地区J47E013011、J47E014011、J47E014012、J47E015011、J47E015012五幅1∶5万区域地质矿产调查"(青国土资矿[2011]277). （青国土资矿[2011]277）
