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
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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 Forécariah 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 which 6 are banded hematite ore bodies and 1 iron 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.
YML iron ore property is located in Forécariah 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 which 6 are banded hematite ore bodies and 1 iron 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.
引文
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[2]Titley M.Mineral resource estimate,Kalia magnetite deposit,Guinea,West Africa[R].CSA Global Report No 182,2009.
[3]曹健,田麒,李宏臣,等.几内亚西南部莫拉铁矿区地质特征及找矿方向[J].地质找矿论丛,2016,31(1):71-76.
[4]韩发,葛朝华.福建马坑铁矿床海相火山热液-沉积成因地质-地球化学特征[J].中国地质科学院矿床地质研究所所刊,1983(2):1-118.
[5]王守伦.鞍本地区鞍山群富铁矿成因类型的讨论[J].矿床地质,1986(4):14-22.
[6]葛朝华,韩发.大宝山铁-多金属矿床的海相火山热液沉积成因特征[J].矿床地质,1986(1):1-12.
[7]王守伦,刘其严,张殿学,等.闽粤地区海底热液喷气成因铁矿床的地球化学特征[J].地质找矿论丛,1993,8(3):14-27.
[8]关广岳.论变质作用在鞍山式铁矿床富矿形成上的意义[J].地质学报,1961(1):67-78.
[9]王福利.浅谈鞍山式富铁矿地质特征及找矿方向[J].吉林地质,2008(2):45-51.