摘要
纽芬兰-拉布拉多省地处加拿大地盾东缘,成矿条件十分优越,是加拿大重要的镍矿成矿区,矿化类型多样。文章基于前人对该区镍矿床和矿化的研究,从区域成矿地质背景、矿化类型及地质特征、地球物理特征、勘探潜力、勘查态势等等方面进行了系统分析。拉布拉多地区的镍矿资源主要分布于辉长质—橄长质镁铁质岩石分布区,主要与中元古代侵入的辉长岩、斜长岩、橄长岩、辉石岩有关,或与太古宙超镁铁质变火山岩有关,矿化类型有橄长岩和辉长岩型、辉石岩型、斜长岩型、铁闪长岩型、火山岩(科马提岩)型;Voisey′s Bay Ni-Cu-Co硫化物矿床是拉布拉多地区已发现的大型镍矿床。纽芬兰地区的镍矿资源主要与古生代辉长-闪长质侵入岩、前寒武系镁铁质片麻岩有关,矿化类型主要有辉长岩型、镁铁质片麻岩型、火山热液型。纽芬兰-拉布拉多省的镍矿勘查前景乐观。
Newfoundland-labrador province is located in the east margin of Canadian shield with superior metallogenic condition.It is a major Ni metallogenic area in Canada with multiple mineralizations.Based on previous study on Ni deposits in the province,regional metallogenic background,mineralization types and the geological characteristics,geophysical feature,prospecting potential and situation are systematically analyzed the Ni deposits in the province.In Labrador area Ni ore is mainly in area where gabbro and troctolite occur and is mainly associated with Middle Proterozoic gabbro,anorthosite,troctolite,pyroxenolite or associated with Archean ultra mafic metamorphosed volcanics.Mineralization is divided into troctolite type,gabbro type,anorthosite type,Fe-diorite and volcanic（komatiite）type.Voisey′s Bay NiCu-Co sulfide deposit is a large Ni deposit discovered in Labrador area.In Newfoundland area Ni ore is mainly associated with Palaeozoic gabbro-diorite intrusive bodies,Precambrian mafic gneiss and mineralization is divided into gabbro type,mafic gneiss type and volcanic hydrothermal type and prospecting us potential in the area.
出处
《地质找矿论丛》
CAS
CSCD
2016年第2期289-294,共6页
Contributions to Geology and Mineral Resources Research
基金
中央地勘基金项目"北美-格陵兰重要成矿带成矿规律与优势矿产资源潜力评价研究"(编号:2011-D3-09-2)资助
关键词
镍矿床
纽芬兰
拉布拉多
矿化类型
勘查潜力
加拿大
nickel deposit
Newfoundland
Labrador
mineralization type
prospecting potential
Canada
