格陵兰地质矿产特征及主要金属矿产找矿方向

Geology and Mineral Resources Characteristics in Greenland and Main Metal Minerals Prospecting Orientation

格陵兰为前寒武纪地盾区,出露的岩石以片麻岩和上壳岩为主,形成于太古代和元古代一系列碰撞造山环境;在地盾西部、东部和北部边缘广泛发育了元古代-中生代的沉积地层和盆地;岩浆活动贯穿于太古代至新生代,形成了岩性多样、规模不一的岩浆岩。格陵兰矿产资源丰富,已发现铁、金、铅锌、稀有稀土、铂族、铜、镍等多种矿产资源。分析表明,格陵兰西南部、中西部和北部分布的条带状含铁建造是寻找BIF型铁矿的有利靶区;西南部太古代绿岩带、南部凯蒂利屯活动带具有寻找绿岩带型金矿和造山带型金矿的潜力;西南部碳酸岩、碱性岩岩体是寻找稀有稀土金属矿床的主要靶区;西北和东北部发育的沉积盆地和地层是寻找SEDEX型和MVT型铅锌矿以及砂页岩型铜矿的有利地区;西南和东南部分布的太古代-元古代基性、超基性岩是寻找铂族元素和镍矿的有利靶区。

Greenland is situated on a Precambrian shield, outeropped rocks me. mainly gneiss and supracrustal rocks formed in a series of collision orogenic events during Archean and Proterozoic eras. Proterozoic-Mesozoic sedimentary formations and basins were widely developed on the western, eastern and northern shield margins. Magmatic activities were occum＇ed throughout Archean to Cenozoic eras and formed diversified magmatic rocks with different dimensions. Greenland possesses abundant iron, gold, lead-zinc, rare RE, plati- num group metals, copper, nickel and other mineral resources. An analysis has shown that the banded iron h^rmations distributed in southwest, midwest and north parts are favorable targets to find B1F type iron ore deposits. Southwestern Archean greenstone belt and southern Ketilidian mobile belt have potential to find greenstone type and orogenic beh type gold ore deposits. Southwestern carbon- atite, alkaline rock masses are main targets to find rare RE metallic ore deposits. Sedimentary basins and strata developed in northwest and northeast parts and are favorable areas to find SEDEX and MVT typed lead-zinc ore deposits and SST typed c, opper ore deposits. Archean-Proterozoic basic and ultrabasic rocks distributed in southwest anti southeast parts are favorable targets to find platinum group metals and nickel ore deposits.