Origin and geotectonic setting of lower Neoproterozoic Kelaat Mgouna detrital material eastern Anti-Atlas, Morocco Origine et contexte geotectonique des depots detritiques du groupe Neoproterozoique inferieur de Kelaat Mgouna (Anti-Atlas Oriental, Maroc)

Fekkak, A. and Boualoul, M. and Badra, L. and Amenzou, M. and Saquaque, A. and El-Amrani, I.E. (2000) Origin and geotectonic setting of lower Neoproterozoic Kelaat Mgouna detrital material eastern Anti-Atlas, Morocco Origine et contexte geotectonique des depots detritiques du groupe Neoproterozoique inferieur de Kelaat Mgouna (Anti-Atlas Oriental, Maroc). Journal of African Earth Sciences, 30 (2). pp. 295-311.

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Abstract

The Kelaat Mgouna lower Neoproterozoic group consists of five siliciclastic formations. It has been considered to have been deposited in a back-arc basin related to a subduction zone corresponding to the 'accident majeur de l'Anti-Atlas'. In this model, the detrital material would have evolved from a volcanic arc. In fact, the modal composition of the greywackes and conglomerates and the analysis of the detrital zircon typology lead to a different model comprising a continental passive margin backed by a pre-Neoproterozoic metamorphic basement and orogenic belt. The Kelaat Mgouna Neopterozoic group was, therefore, deposited in a passive setting within an opening basin synchronous with the extensional pre-Pan-African episode. (C) 2000 Elsevier Science Limited. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	continental margin; depositional environment; passive margin; Proterozoic; siliciclastic deposit, Morocco
Subjects:	Earth and Planetary Sciences
Divisions:	SCIENTIFIC PRODUCTION > Earth and Planetary Sciences
Depositing User:	Administrateur Eprints Administrateur Eprints
Last Modified:	31 Jan 2020 15:47
URI:	http://eprints.umi.ac.ma/id/eprint/2981

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