Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6443847 | Journal of African Earth Sciences | 2014 | 10 Pages |
Abstract
The paleomagnetism is a powerful tool to date formations that have age not constrained by paleontological, stratigraphical or radiochronological data. It was applied, on the western border of the Murzuq basin in Algeria (Saharan platform), to the Zarzaïtine formation, attributed to a Middle-Upper Triassic-Lower Jurassic age. Comparison of the obtained paleomagnetic pole with previous poles from the same geological formation outcropping in another basin and from other Carboniferous to Lower Mesozoic African formations yielded a clearly older age (Late Permian) than expected. That evidences a strong diachronism (at least 40Â My) of the deposition of this formation on the Saharan platform. The post-Hercynian structural evolution was therefore different according to the parts of this platform, with significant differential vertical tectonic movements. The latter were at the origin of erosion, hiatus or sediments deposition according to areas.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geology
Authors
B. Henry, M.E.M. Derder, M. Amenna, S. Maouche, B. Bayou, A. Ouabadi, H. Bouabdallah, M. Beddiaf, M. Ayache, R. Bestandji,