几内亚福雷卡里亚YML铁矿区的富铁矿床地质特征及找矿前景探讨  

Study on prospecting potential and geological characteristics of the high-grade iron deposit in YML Property area of Forécariah Prefecture,Guinea

作　　者：江胜国[1] 李宏臣 付方建[1] 王志刚[1] 曹健[1] JIANG Shengguo;LI Hongchen;FU Fangjian;WANG Zhigang;CAO Jian(Geological Institute of Tianjin North China Geological Exploration Bureau,Tianjin 300171,China)

机构地区：[1]天津华北地质勘查局地质研究所,天津300171

出　　处：《地质找矿论丛》2018年第1期142-148,共7页Contributions to Geology and Mineral Resources Research

摘　　要：YML铁矿区位于几内亚福雷卡里亚省,富铁矿以条带状赤铁矿和铁角砾岩矿为主。矿区内共发育7条矿体,条带状赤铁矿体6条,铁角砾岩矿体1条。条带状赤铁矿体赋存部位多为向形地段,次级紧密褶皱发育,沿走向和倾向有逐渐变薄和尖灭的趋势;铁角砾岩矿体覆盖于地表,以风化壳的形式出现。矿床类型属复合类型,即海底热液喷气沉积叠加后期构造变质型+风化淋滤型。该区具备铁矿形成和保存的地质条件,且已发现具一定储量、品位较高的条带状赤铁矿和大面积的铁角砾岩分布区,区内铁矿找矿远景较好。YML iron ore property is located in Forecariah Prefecture of Guinea.The rich iron ore is dominated by the banded hematite ore and iron breccia ore(canga).There are seven iron ore bodies of which6are banded hematite ore bodies and1iron breccia ore body.The banded hematite ore bodies occur generally at synforms with sub-close folds developed and gradually get thinner or pinch out along strike and dip.The iron breccia ore body occurs as weathered crust at surface.The YML iron deposit is a complex deposit i.e.Sedex overprinted by late structural metamorphic+weathering leaching.The mine area is of formation and preservation condition of iron ore.A certain iron ore reservation has been located and banded hematite ore and iron breccia are widely spread thus potential foe further prospecting.

关 键 词：YML铁矿区 富铁矿床 条带状赤铁矿 铁角砾岩 沉积变质型 风化淋滤型 找矿前景 几内亚 

分 类 号：P618.31[天文地球—矿床学] P613[天文地球—地质学]