Voisey’s Bay – Geology, Geochemistry and Genesis

Jeff Foster

doi:10.1071/ASEG2006ab046

ISSN: 2202-0586
E-ISSN:

oa Voisey’s Bay – Geology, Geochemistry and Genesis
Authors Jeff Foster^a
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^a GeoDiscovery Group, LvL 1, 686 Sherwood Rd QLD, , 4075, Australia, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2006, Issue ASEG2006 - 18th Geophysical Conference, Dec 2006, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2006ab046
- Published online: 01 Dec 2006

Abstract

The ~ 1333 Ma Voisey’s Bay Intrusion represents one of the earliest magmatic events recorded in the development of the Nain Plutonic Suite. The intrusion was likely emplaced at a depth of ~ 14 km.

Sulphide saturation occurred due to the assimilation of bulk Churchill gneiss in a series of sub-chambers below the current level of erosion. The current economic ore zones formed by the accumulation of magmatic sulphides in physical traps from a pulsed series of sulphide-laden magmas derived from the sub-chambers.

The initial melt had an MgO content of > 8 wt % and a geochemical and isotopic composition similar to some Proterozoic flood basalts.

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2006-12-01

2026-01-13

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References

Amelin, Y., Li, C., Valeyev, O., and Naldrett, A. J., 2000, Nd-Pb-Sr Isotope Systematics of Crustal Assimilation in the Voisey’s Bay and Mushua Intrusions, Labrador, Canada. Econ. Geol. V95, p. 815-830.
Bedard, J., Parental magmas of the Nain Plutonic Suite anorthosites and mafic cumulates: a trace element modelling approach, 2001, Contrib. Mineral. Petrol. V141, p. 747-771
Li, C., Lightfoot, P. C., Amelin, Y., and Naldrett, A. J., 2000, Contrasting Petrological and geochemical Relationships in the Voisey’s bay and Mushua Intrusions, Labrador, Canada. Implications for Ore Genesis. Econ. Geol. V95, p. 771-799.
Lightfoot, P.C., 2003, Sulfide Saturation and Formation of the Voisey’s Bay Intrusion. In New Frontiers in Research on Magmatic NiS-PGE Mineralisation. Ed(s) W. E. Stone., UWA, pp 180.

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Article Type: Research Article

Keyword(s): Geochemistry; Magmatic Sulphides; Nain Plutonic Suite; PGE’s; Voisey’s Bay

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