一种新类型镍矿床的发现及其意义——赞比亚西北省英特普莱斯镍矿的发现过程

The discovery of a new style of nickel deposit and its significance:the discovery of the Enterprise nickel deposit in the North-Western Province of Zambia

英特普莱斯镍矿为一种新类型热液硫化镍矿床,位于赞比亚西北省卡波姆坡穹窿东缘的新元古代沉积变质岩中。容矿主岩以黑色页岩为主,少量粉砂岩、碳酸岩地层。因强烈蚀变作用,容矿主岩含有大量的蓝晶石、滑石和镁绿泥石。镍硫化物呈细脉状、团斑状产出,镍矿化主要为浸染状和细脉状硫化物。镍硫化物矿物主要是镍黄铁矿、方硫镍矿、针镍矿,产于石英-蓝晶石脉及其蚀变晕中。土壤化探工作对该矿发现发挥了非常重要的作用。该矿床的发现初步揭示了卢弗里安造山带镍矿巨大的找矿前景。

The Enterprise nickel deposit represents a new style of hydrothermal nickel mineralization,which is hosted in Neoproterozoic sedimentary metamorphic rocks at the eastern edge of the Kabompo dome in the North-Western Province of Zambia.Host rocks are mainly black shale,minor siltstone and carbonate rock strata.Because of strong alteration,the host rocks contain a great quantity of kyanite,talc,and magnesian chlorite.Nickel mineralization is mainly disseminated as veinlet sulphides.Nickel sulfides occur as spotted shape in veins.Nickel sulfides are mainly bravoite,vaesite,millerite,hosted within quartz-kyanite veins and their halos.Soil geochemical prospecting work has played a key role in discovering the deposit.It is indicated that there is a great prospecting prospect of Ni deposit in the Lufilian orogenic belt for the discovery.