Ruiz, G.M.H., Sebti, S., Negro, F., Saddiqi, O., Frizon De Lamotte, D., Stockli, D., Foeken, J., Stuart, F., Barbarand, J. and Schaer, J.P. (2011) From central Atlantic continental rift to Neogene uplift - western Anti-Atlas (Morocco). Terra Nova, 23(1), pp. 35-41. (doi: 10.1111/j.1365-3121.2010.00980.x)
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Abstract
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<sup>−1</sup>.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Stuart, Professor Fin and Foeken, Dr Jurgen |
| Authors: | Ruiz, G.M.H., Sebti, S., Negro, F., Saddiqi, O., Frizon De Lamotte, D., Stockli, D., Foeken, J., Stuart, F., Barbarand, J., and Schaer, J.P. |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences |
| College/School: | College of Science and Engineering > Scottish Universities Environmental Research Centre |
| Journal Name: | Terra Nova |
| Publisher: | Wiley-Blackwell Publishing Ltd. |
| ISSN: | 0954-4879 |
| ISSN (Online): | 1365-3121 |
| Published Online: | 29 December 2011 |
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