西非铁矿资源现状及潜力分析  

Status and potential of iron ore resources in the West Africa

作　　者：胡鹏[1] 曾国平 刘江涛[1] 姜军胜 向文帅[1] 曹亮[1] 赵凯 刘阿睢 杨奇荻 李福林[1] 程湘[1] 张海坤[1] HU Peng;ZENG Guoping;LIU Jiangtao;JIANG Junsheng;XIANG Wenshuai;CAO Liang;ZHAO Kai;LIU Asui;YANG Qidi;LI Fulin;CHENG Xiang;ZHANG Haikun(WuhanCenter,China Geological Survey,Wuhan,430205)

机构地区：[1]中国地质调查局武汉地质调查中心,武汉430205

出　　处：《地质学报》2021年第4期1306-1319,共14页Acta Geologica Sinica

基　　金：中国地质调查局“几内亚-科特迪瓦莱奥地盾铁锰铝资源调查(DD20201153)”、“北部非洲大型铜金资源基地评价(DD20190443)”和“尼日利亚中部锡铌钽锂资源调查(DD20201152)”项目资助的成果。

摘　　要：西非是世界上铁矿资源最为丰富的地区之一,铁矿石总资源量可达649.5亿吨,占全球8%,主要分布于马恩地盾和雷圭巴特地盾,以几内亚、塞拉利昂、利比里亚和毛里塔尼亚四国最为丰富,成因类型以BIF型为主。公开资料显示,目前有43家公司投资开发73个西非铁矿项目,其中中国庆华集团、宝武集团、赢联盟集团、中国铝业和中投资本公司等五家中资企业拥有权益资源量达217.5亿吨,形成与西非本土8国和西方7国公司三足鼎立的局势。基于标普数据库和各公司最新年报统计,发现近10年西非铁矿石年均产量为0.2亿吨,世界占比不足0.1%。目前大部分矿山处于暂停开发或暂时搁置状态,仅有21个铁矿山处于活跃状态。其中,中资企业控制的五个项目中也只有唐克里里铁矿处于开发状态。基于西非地质和航磁资料,利用证据权模型,预测在90%、50%和10%置信水平下,西非地区未发现铁矿床数量分别为63个、92个和324个,铁矿石预测资源量分别为264.6亿吨、386.4亿吨和1360.8亿吨。West Africa is one of the regions with the most abundant iron ore resources in the world,with the total amount of iron ore up to 64.95 billion tons,accounting for 8%of the world.The iron ore resources in the West Africa are mainly distributed in the Man Shield and Reguibat Shield,with the most abundant in Guinea,Sierra Leone,Liberia and Mauritania,and the genetic type of ore deposit is mainly BIF type.According to public information,43 companies have invested in the development of 73 iron ore mines in West Africa,among which five Chinese companies,including the China Kingho,China Baowu Steel Group,SMB-Winning Consortium,Aluminum Corporation of China and China International Fund Management Co.Ltd.,have the equity resources of 21.75 billion tons,forming a three-way competition with the 8 native countries of the West Africa and the 7 western countries.Based on the database of S&P Global Market Intelligence and the annual reports of the iron ore companies,the annual iron ore product of west Africa in recent ten years is 20 million tons,accounting for less than 0.1%of the world.So far,most of the iron ore mines in West Africa are suspended or temporarily suspended,and only 21 iron ore mines are active.Among the five projects controlled by Chinese companies,only the Tonkolili iron mine is under development.Based on the geological and aeromagnetic data of West Africa,we used the weight of evidence model to calculate the potential iron ore resource of West Africa.It is predicted that the number of undiscovered iron ore deposits in West Africa is 63,92,and 324,respectively,and the resource potential is 26.46 billion tons,38.64 billion tons and 136.08 billion tons respectively,at the 90%,50%,and 10%confidence levels.

关 键 词：西非 铁矿 资源现状 证据权模型 潜力评价 

分 类 号：P618.31[天文地球—矿床学]