华南地质2024，Vol.40Issue(1)：63-74,12.DOI:10.3969/j.issn.2097-0013.2024.01.004
地球化学块体理论在厄立特里亚铜资源潜力预测中的应用
Application of Geochemi-cal Block Method in the Potential Prediction of Copper Resources in Eritrea
摘要
Abstract
The Neoproterozoic East African orogeny formed a large area of exposed metavolcanic sedimenta-ry rock series and corresponding granitic magmatic rocks in the Arab-Nubian Shield,Eritrea,in which the copper resource is very rich.In this paper,1:1000000 stream sediment geochemical data in Eritrea was select-ed as the research object.Based on the theory of geochemical block method,we synthetically evaluated the Cu resource potential of Eritrea.The result of geochemical data shows that the value of geochemical anomaly threshold is 28×10-6.Seven geochemical blocks and five regional anomalies were delineated.According to the reserves of known deposits in different metallogenic belts,the mineral coefficient of Cu in each areawas cal-culated.The total copper tonnage and mineral resources in each area were calculated based on the exploration depth of the 1km.Thus,we inferred that the total copper tonnage in the 7 geochemical blocks and 5 regional geochemical anomalies of Eritrea(given a 1 km thickness of every rock mass)is 9.3076 million tons.Among them,geochemical blocks 5 and 6 should be used as the focus of the next step,and the exploration potential in geochemical blocks 1,2,3,4 and 7 should also be noted.关键词
地球化学块体/铜矿/资源潜力预测/厄立特里亚Key words
geochemical block/copper deposit/mineral resources forecast/Eritrea分类
地质学引用本文复制引用
向文帅,姜军胜,赵凯,曾国平,Ermias Yohannes,Tesfai Berhe..地球化学块体理论在厄立特里亚铜资源潜力预测中的应用[J].华南地质,2024,40(1):63-74,12.基金项目
湖北省自然科学基金项目(2022CFB850)、中国地质调查局项目(DD20230575,DD20221802,DD20190443) （2022CFB850）
