加拿大Voisey's Bay Ni-Cu-Co硫化物矿床岩浆通道成矿系统——小岩体成矿典型实例

The Magma Conduit System of Canada Voisey's Bay Ni-Cu-Co Sulfide Deposit——Representative Example of Small Intrusions Mineralization

Voisey′s Bay岩体(VBI)位于加拿大拉布拉多岛北部中元古代Nain深层岩套(NPS)中,Voisey′s Bay Ni-Cu-Co硫化物矿床的成岩成矿时代为1.34Ga。岩体主要由Western Deeps岩体和Eastern Deeps岩体组成,它们由1条隐伏的岩浆通道所连接,矿体就位于岩浆通道中,形成典型岩浆通道成矿系统。在Voisey′sBay地区同时代岩体有很多,相对于相邻的其他岩体来说,Voisey′s Bay岩体体积最小,到目前为止,只有Voisey′s Bay岩体形成了大型Ni-Cu-Co硫化物矿床,是小岩体成大矿的典型实例。

The Voisey＇s Bay Intrusion （VBI） is located in the Mesoproterozoie Nain Plutonic Suite （NPS） in Labrador, Canada. The Voisey＇s Bay deposit is hosted in a 1.34 Ga intrusion composed of troetolite, oli- vine gabbro, and ferrogabbro. The Voisey＇s Bay Intrusion consists broadly of two intrusions--the outcrop- ping heavily mineralized Eastern Deeps Intrusion and the buried Western Deeps Intrusion. These intrusions are possibly connected by a contemporaneous continuous variably mineralized dyke. There have many con- temporaneous intrusions in the area of Voisey＇s Bay, Voisey＇s Bay Intrusion have the minimum volume and just the VBI developed in to a large-sealeNi-Cu-Co sulfide deposit, it is the representative example of small intrusions mineralization.