20 research outputs found
Deformation of intrasalt beds recorded by magnetic fabrics
Funding Information Israel Science Foundation (ISF). Grant Number: 868/17 Israeli Government. Grant Number: 40706 Israel Science Foundation. Grant Number: 868/17Peer reviewedPublisher PD
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Quaternary rise of the Sedom diapir, Dead Sea basin
Mount Sedom is the surface expression of a salt diapir that has emerged since the Pleistocene in the southwestern part of
the Dead Sea basin. Milestones in the uplift history of the Sedom salt diapir since its inception were deduced from angular
and erosional unconformities, thickness variations, caprock formation, chemistry and isotope composition of lacustrine aragonite,
cave morphology, precise leveling, and satellite geodesy. Thickness variations of the overburden observed in transverse seismic
lines suggest that significant growth of the Sedom diapir may have initiated only after this thickness exceeded âŒ2400 m in
the Late Pliocene. The formation of the caprock signifies the arrival of the Sedom diapir from depth to the dissolution level
between 300,000â100,000 yr B.P. During this period and later, angular and erosional unconformities in the upper part of the
overburden near Mount Sedom are attributed to the piercing diapir. Rapid solution of rock salt from parts of Mount Sedom inundated
by Lake Lisan after ca. 40,000 yr B.P. is inferred from Na/Ca ratios in aragonite and their relation to ÎŽ 13 C. On the mountain itself, the older parts (70,000â43,000 yr B.P.) of the lacustrine Lisan Formation are missing. The top
of the preserved sediments is covered by alluvial sediments that must have been deposited when the elevation of Mount Sedom
was not higher than 265 m below sea level (mbsl) at ca. 14,000 yr B.P. The present elevation of these sediments at 190 mbsl
indicates an average uplift rate of âŒ5 mm/yr over the past 14,000 yr. Similar uplift rates of 6â9 mm/yr are inferred for the
Holocene from displacement of the âsalt mirrorâ and hanging passages of caves. The present uplift rate, calculated from precise
leveling and interferometric synthetic aperture radar (InSAR), is similar to the average Holocene rate. Based on the gathered
data, we reconstruct the topographic rise of Sedom diapir and its relation to lake level variations during the late Pleistocene
and Holocene
Integrated 3D forward stratigraphic and petroleum system modeling of the Levant Basin, Eastern Mediterranean
International audienceThe Eastern Mediterranean Levant Basin is a proven hydrocarbon province with recent major gas discoveries. To date, no exploration wells targeted its northern part, in particular the Lebanese offshore. The present study assesses the tectonoâstratigraphic evolution and related petroleum systems of the northern Levant Basin via an integrated approach that combines stratigraphic forward modeling and petroleum systems/basin modeling based on the previous published work. Stratigraphic modeling results provide a bestâfit realisation of the basinâscale sedimentary filling, from the postârift Upper Jurassic until the Pliocene. Simulation results suggest dominant eastern marginal and Arabian Plate sources for Cenozoic siliciclastic sediments and a significant contribution from the southern Nilotic source mostly from Lower Oligocene to Lower Miocene. Basin modeling results suggest the presence of a working thermogenic petroleum system with mature source rocks localised in the deeper offshore. The generated hydrocarbons migrated through the deep basin within Jurassic and Cretaceous permeable layers towards the Latakia Ridge in the north and the Levant margin and offshore topographic highs. Furthermore, the basin model indicates a possibly significant influence of salt deposition during Messinian salinity crisis on formation fluids. Ultimately, the proposed integrated workflow provides a powerful tool for the assessment of petroleum systems in underexplored areas