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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
From central Atlantic continental rift to Neogene uplift - western Anti-Atlas (Morocco)
Terra Nova, Volume 23, No. 1, Year 2011
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Description
To put constraints on the Mesozoic to recent growth of the Anti-Atlas system, we investigated the temperature-time history of rocks by applying extensive low-temperature thermochronological analysis to three Precambrian inliers along the coast and 250 km into the interior. Bedrocks yield old U-Th/He ages on zircon (248-193 Ma) and apatite (150-50 Ma) and also fission-track ages of 173-121 Ma on apatite. These datasets are interpreted as recording passive margin upward movements from central Atlantic rifting until the Early Cretaceous. A phase of sedimentary burial was evidenced for the Cretaceous-Eocene. The extension of this thin (1.5 km) basin is loosely constrained but can be extended to the western regions of northern Africa. Effects of the existing thermal perturbation of lithospheric origin 100 km below the Atlas show that the 120-60 °C isotherms are not much deflected. Large-scale uplift has possibly occurred in the western Anti-Atlas since c. 30 Ma and is associated with a mean denudation rate of 0.08 km Ma-1. © 2010 Blackwell Publishing Ltd.
Authors & Co-Authors
Ruiz, Geoffrey
Switzerland, Lausanne
Université de Lausanne Unil
Sebti, Samira
Morocco, Casablanca
Hassan Ii University of Casablanca
Negro, François
Switzerland, Neuchatel
Université de Neuchâtel
Saddiqi, Omar
Morocco, Casablanca
Hassan Ii University of Casablanca
Frizon De Lamotte, Dominique
France, Cergy-pontoise
Cy Cergy Paris Université
Stockli, Daniel Fritz
United States, Lawrence
University of Kansas
Foeken, J.
Netherlands, Amsterdam
Vrije Universiteit Amsterdam
Stuart, Finlay M.
United Kingdom, Glasgow
University of Glasgow
Barbarand, Jocelyn
France, Orsay
Géosciences Paris Sud Geops
Schaer, J. P.
Switzerland, Neuchatel
Université de Neuchâtel
Statistics
Citations: 69
Authors: 10
Affiliations: 8
Identifiers
Doi:
10.1111/j.1365-3121.2010.00980.x
ISSN:
09544879
e-ISSN:
13653121
Study Locations
Morocco