Skip to Main Content
Book Chapter

A Review of Conduit-Related Ni-Cu-(PGE) Sulfide Mineralization at the Voisey’s Bay Deposit, Labrador, and the Eagle Deposit, Northern Michigan

By
Edward M. Ripley
Edward M. Ripley
Search for other works by this author on:
Chusi Li
Chusi Li
Department of Geological Sciences, Indiana University, Bloomington, Indiana 47405
Search for other works by this author on:
Published:
January 01, 2011

Abstract

Mafic to ultramafic intrusive systems necessarily contain "conduits" through which magma has passed enroute to shallow levels of the crust. It is now commonly accepted that conduit systems are key sites for the accumulation of immiscible sulfide liquid and the generation of Ni-Cu-(PGE) deposits. Deposits such as those of Voiseys Bay in Labrador and Eagle in northern Michigan illustrate that sulfide deposits may form in both near vertical and horizontal portions of conduit systems. Although the Voisey Bay deposit is considerably larger than that associated with the Eagle intrusion, there are important similarities that emphasize the role of magma conduits in localizing sulfide mineralization. in addition to the similarities related to the physical collection of dense sulfide liquid, both deposits occur in provinces where anorthosites and early-stage picritc magmatism (Nain Plutonic Suite and the Midcontinent Rift system) are key elements of geochemical development. Geochemical evidence for the contamination of mafic magma by country rocks exists at both Voiseys Bay and Eagle. Conduit systems such as those of Voiseys Bay and Eagle provide an environment for enhanced magma-country rock interaction that may trigger the attainment of sulfide saturation of passing magma and initiate the ore-forming process.

You do not currently have access to this article.
Don't already have an account? Register

Figures & Tables

Contents

Reviews in Economic Geology

Magmatic Ni-Cu and PGE Deposits: Geology, Geochemistry, and Genesis

Chusi Li
Chusi Li
Indiana University
Search for other works by this author on:
Edward M. Ripley
Edward M. Ripley
Indiana University
Search for other works by this author on:
Society of Economic Geologists
Volume
17
ISBN electronic:
9781629490243
Publication date:
January 01, 2011

GeoRef

References

Related

A comprehensive resource of eBooks for researchers in the Earth Sciences

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal