Unraveling rift margin evolution and escarpment development ages along the Dead Sea fault using cosmogenic burial ages

Abstract

Frumkin, A. (2014): Unraveling rift margin evolution and escarpment development ages along the Dead Sea fault using cosmogenic burial ages.

The formation of graben morphology in the Dead Sea Fault, and its implications

“…The basin became a landlocked depression into which drainage of a large area was diverted, resulting in the accumulation of~4 km of fluvio-lacustrine sediments [Garfunkel, 1997;ten Brink and Flores, 2012], composing the Amora formation. A first order approximation of the timing of the Sedom-Amora transition yields circa 2.95 Ma [Zak, 1967] that is consistent with other estimations (e.g., circa 3.4-4 Ma, Steinitz and Bartov [1991], and circa 3:3 þ 0:9 À 0:8 Ma, Matmon et al [2014]). The upper Pleistocene sequence (0-500 m depth) overlying the Cover Basalt formation at the KB has common features with the Amora formation at the DSB and thus belongs to the Dead Sea Group [Heimann and Braun, 2000].…”

“…Horizontal velocity applied to the eastern vertical boundary of the structure reproduces a slow (~1000 m/Ma) extension over the Arabian plate [ Smit et al ., ; LePichon and Gaulier , ; Matmon et al ., ] (Figure a). Syn‐rift sedimentation is being added into the rift valley during the simulation, while deposition rate of evaporites exceeds 6 times that of the postevaporitic sediment.…”

“…A first order approximation of the timing of the Sedom‐Amora transition yields circa 2.95 Ma [ Zak , ] that is consistent with other estimations (e.g., circa 3.4–4 Ma, Steinitz and Bartov [], and circa Ma, Matmon et al . []). The upper Pleistocene sequence (0–500 m depth) overlying the Cover Basalt formation at the KB has common features with the Amora formation at the DSB and thus belongs to the Dead Sea Group [ Heimann and Braun , ].…”

Dating growth strata and basin fill by combining 26Al/10Be burial dating and magnetostratigraphy: Constraining active deformation in the Pamir–Tian Shan convergence zone, NW China

“…Unfortunately, a simple transport, burial, and exhumation history, and the assumption that the sample has remained well shielded since its final deposition are commonly not true in tectonically active areas, and in these cases, both postburial production and a prolonged transport history (i.e., transient storage in the catchment) can have a significant effect on the burial ages (Puchol et al, 2017). In contrast to the common application of burial dating to cave sediments, which are well shielded since deposition, the sediments in basins may experience prolonged exposure during burial and reexposure during subsequent deformation (Matmon et al, 2014;Ciampalini et al, 2015;Puchol et al, 2017). Postburial production, which is the production of 26 Al and 10 Be after the initial exhumation, erosion, and transport on hillslopes, increases the concentrations and ratio of 26 Al and 10 Be, resulting in an apparently younger age.…”

Rates and Cycles of Microbial Sulfate Reduction in the Hyper-Saline Dead Sea over the Last 200 kyrs from Sedimentary δ34S and δ18O(SO4)

“…After the disconnection of the Sedom lagoon from the open sea around 3 Ma (Torfstein et al, 2009;Belmaker et al, 2013;Matmon et al, 2014), the limnological and geochemical history of the closed and terminal water bodies that subsequently occupied the DSB (the early-to mid-Pleistocene Lake Amora, last glacial Lake Lisan, and the Holocene Dead Sea) was controlled by the interaction between the brine and freshwater input (Katz et al, 1977;Stein, 2001;Gavrieli and Stein, 2006;Katz and Starinsky, 2008).…”