Rotations in Lebanon inferred from new palaeomagnetic data and implications for the evolution of the Dead Sea Transform system
Published:January 01, 2010
B. Henry, C. Homberg, M. Mroueh, W. Hamdan, F. Higazi, 2010. "Rotations in Lebanon inferred from new palaeomagnetic data and implications for the evolution of the Dead Sea Transform system", Evolution of the Levant Margin and Western Arabia Platform since the Mesozoic, C. Homberg, M. Bachmann
Download citation file:
A study carried out on widespread sites of the Aptian–Albian formations in Lebanon led to two palaeomagnetic directions corresponding to the primary magnetization (N=37 sites, D=307.1°, I=23.7°, k=18 and α95=5.5° after tilt correction and to a post-folding remagnetization (N=18 sites, D=346.3°, I=49.2°, k=108 and α95=3.2° before tilt correction). Comparison of these data with previous palaeomagnetic results for the Jurassic age in Lebanon and expected directions from African apparent polar wander path yields evidence of three different counter-clockwise regional rotations, of the order of 33° before Aptian deposition, of 11° during Late Miocene times, and of 18° since Miocene period. The two last rotations are related to the relative displacement of the African and Arabian plates. A model is proposed for the evolution of this particular Middle East area, in which the Dead Sea Transform shows a strong deviation relative to its main north–south orientation.
Figures & Tables
Evolution of the Levant Margin and Western Arabia Platform since the Mesozoic
This volume combines original data in various fields from the offshore Levant Basin and adjacent continental slopes and platforms. The first group of papers document the tectonic structures and sedimentological patterns associated with the development of the Levant Basin. They identify the successive rifting events from the Late Palaeozoic to the Early Cretaceous, followed by a moderate tectonic activity. The contribution of external factors like global sea-level and climate changes to the sedimentation processes during the Mid-Cretaceous is discussed in the second set of papers. The final group presents new kinematics and age constraints on the Late Cretaceous to Neogene tectonic phases and discusses the relationship of the structures with the closure of the Neo-Tethys and separation of the Arabia plate. This collection of research papers demonstrates new concepts on the opening and crustal thinning of the Levant Basin and gives updated interpretations of the latter tectonic structures of the Levant.