Archean crust as revealed in the Kapuskasing uplift, Superior province, Canada

In the central Superior province of the Canadian Shield, a 120-km-wide transition from the low-grade Michipicoten greenstone belt to the high-grade Kapuskasing structural zone represents an oblique section through some 20 km of Archean crust, uplifted along a northwest-dipping thrust fault. The rest...

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Bibliographic Details
Published in:Geology (Boulder) 1983-06, Vol.11 (6), p.323-326
Main Authors: Percival, J A, Card, K D
Format: Article
Language:English
Online Access:Get full text
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Summary:In the central Superior province of the Canadian Shield, a 120-km-wide transition from the low-grade Michipicoten greenstone belt to the high-grade Kapuskasing structural zone represents an oblique section through some 20 km of Archean crust, uplifted along a northwest-dipping thrust fault. The restored vertical section through the upper and middle crust consists of three megalayers with undulating boundaries: (1) 0 to 25 km, a high-grade heterogeneous gneissic assemblage, in part older than the upper supracrustal succession.
ISSN:0091-7613
DOI:10.1130/0091-7613(1983)112.0.CO;2