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The sidi Mohamed peridotites (Edough Massif, NE Algeria) - evidence for an upper mantle origin

  • The Hercynian Edough massif is the easternmost crystalline massif of the Algerian coast. It consists of two tectonically superposed units composed of micaschists, gneisses, and peridotite. This study concentrates on the small and isolated Sidi Mohamed peridotite outcrop area (0.03 km(2)). The Sidi Mohamed peridotite is composed mainly of harzburgites (Mg-rich olivine and orthopyroxene as major minerals). The Ni (2051-2920 ppm), Cr (2368-5514 ppm) and MgO (similar to 28-35 wt.%) whole-rock composition and the relative depletion in Nb make these harzburgites comparable to depleted peridotites related to a subduction zone. We suggest that the Sidi Mohamed ultramafic body was derived directly from the upper mantle and tectonically incorporated into the gneiss units of the Edough metamorphic core complex in a subduction environment.

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Metadaten
Author:Soraya Hadj Zobir, Roland OberhänsliGND
DOI:https://doi.org/10.1007/s12040-013-0358-z
ISSN:0253-4126 (print)
ISSN:0973-774X (online)
Parent Title (English):Journal of earth system science
Publisher:Indian Academy of Science
Place of publication:Bangalore
Document Type:Article
Language:English
Year of first Publication:2013
Year of Completion:2013
Release Date:2017/03/26
Tag:Algeria; Edough; Peridotites; upper mantle
Volume:122
Issue:6
Pagenumber:11
First Page:1455
Last Page:1465
Funder:DAAD; University of Annaba
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Erd- und Umweltwissenschaften
Peer Review:Referiert
Publication Way:Open Access