物探与化探2024，Vol.48Issue(2)：382-392,11.DOI:10.11720/wtyht.2024.1128
利比里亚Harper地区水系沉积物地球化学特征及找矿方向
Stream sediment geochemistry and prospecting targets in Harper,Liberia
摘要
Abstract
Birimian rocks,the most significant Au ore-forming rocks in western Africa,are widespread in Harper,southeastern Liberi-a.As indicated by the geochemical parameters from the 1 ∶ 250 000 stream sediment survey of this region,elements Au and Hg exhibit high enrichment and high differentiation while element As manifests enrichment and high differentiation.These findings suggest consid-erable potential for Au prospecting.Based on the correlation analysis of elements,this study selected factors F1(for the Au-Hg-Pb-Sn association)and F2(for the As-Sb-W association)to effectively guide the exploration of gold deposits.Thirteen composite anomalies were delineated by extracting the anomaly information of Au,Hg,As,and Sb from the two principal factors,effectively reflecting the anomaly distributions of different gold deposits or ore occurrences.The geological and mineral surveys in anomaly areas reveal that are-as HS1-HS3 and HS12-HS13 with composite anomalies characterized by directional distribution and high intensities show distinct Au mineralization information.Based on this,two major Au prospects,i.e.,Seethum New and Behwan,have been identified for further detailed exploration.关键词
金矿/水系沉积物/异常提取/成矿远景区/利比里亚Key words
gold deposit/stream sediment/anomaly extraction/metallogenic prospect area/Liberia分类
天文与地球科学引用本文复制引用
白洋,吴颖,张元培,陈开旭,陈冲,李福林,张继纯,魏凌霄,司可夫,郑雄伟,胡云飞..利比里亚Harper地区水系沉积物地球化学特征及找矿方向[J].物探与化探,2024,48(2):382-392,11.基金项目
商务部援外技术合作项目"援利比里亚矿产资源调查"(IGGEF2015042) （IGGEF2015042）
