RT Journal Article
T1 Tectónica reciente en la cuenca de Ouarzazate (Atlas marroquí): Tasas de acortamiento y levantamiento tectónico a partir de los marcadores cuaternarios
T1 Recent tectonics in the Ouarzazate basin (Moroccan Atlas):Tectonic uplift and shortening rates from Quaternary markers
A1 Pastor, Àlvar
A1 Teixell, Antonio
A1 Arboleya, María Luisa
AB Recent studies have shown that the uplift of the moroccan Atlas Mountains resulted from a combination of crustal shortening and mantle thermal processes. Within this framework, to gain insight of the dynamics of these processes in recent times, we have investigated the nature and rates of Quaternary deformation in a case field area, which contains the best dated record of fan and terrace deposits, and a moderate seismicity. The area selected is the northern Ouarzazate basin, at the southern orogenic front ofthe Atlas, where folds and thrusts involve a sequence of stepped terraces where recently obtained Terrestrial Cosmogenic Nuclide surface exposure ages provide a basis to calculate shortening rates for the last —250 ky (since the interglacial peak MIS-9c).Calculated Quaternary shortening rates for individual thrust structures range between 0.13-0.21 mmfy, which are greater that the average for these structures since Miocene times, but not very different from the total shortening rate estimated for the southern Atlas front since then (0.3 mmfy). Seismic reflection profiles show two tectonic styles acting simultaneously within the northern Ouarzazate basin: thick-skinned to the west and thin-skinned to the east. This difference is also reflected on the deformation geometry ofthe Quaternary markers
YR 2010
FD 2010
LK http://hdl.handle.net/10272/7911
UL http://hdl.handle.net/10272/7911
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026