Shear zones in the upper mantle: A case study in an Alpine Iherzolite massif

The Erro-Tobbio upper-mantle lherzolite of northwest Italy, emplaced in the Alpine suture zone during collision of the European and Adriatic plates, has preserved a set of major shear zones formed at temperatures in the range 800-1040 {degrees}C during the period of Jurassic rifting and breakup and...

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Bibliographic Details
Published in:Geology (Boulder) 1991-10, Vol.19 (10), p.990-993
Main Authors: Vissers, R L M, Drury, M R, Strating, E H Hoogerduijn, Van Der Wal, D
Format: Article
Language:English
Online Access:Get full text
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Summary:The Erro-Tobbio upper-mantle lherzolite of northwest Italy, emplaced in the Alpine suture zone during collision of the European and Adriatic plates, has preserved a set of major shear zones formed at temperatures in the range 800-1040 {degrees}C during the period of Jurassic rifting and breakup and development of the Piemonte-Ligurian oceanic basin. These structures clearly demonstrate localization of the deformation in the Piemonte-Ligurian upper mantle during lithosphere stretching and breakup.
ISSN:0091-7613
DOI:10.1130/0091-7613(1991)0192.3.CO;2