IOCG-Type And Affiliated Deposits In The Romanet Horst, Labrador Through, Canada: Insights From Geochemical Fingerprint Of High Temperature Albitization

English Abstract:

Because of their large sizes, simple metallurgy, diversified resources and high grades, Iron-Oxide-Copper-Gold-type (IOCG-type) and affiliated deposits can produce extremely profitable mines. Over a century of geological mapping and exploration work in the Romanet Horst, Labrador Through, Canada, currently suggests a high potential for such deposits. Hydrothermal alteration and brecciation is widespread and commonly associated with Fe-Cu-Au-Ag-U mineralization. In the present research, we focus on primitive high temperature albitization and its geochemical fingerprint. We compare and contrast the albitization and associated mineralization in the Romanet Horst Area with that in the Great Bear IOCG Magmatic Zone. The objective is to characterize the fluids associated with the primitive, high temperature sodic alteration, to establish links, if any, between these fluids and mafic feeder magmas, and to distinguish the albitization which is associated with mineralization from that which is not. It is our hope that the albitization fingerprint will become an exploration vector for IOCG-type and affiliated deposits.