scholarly journals Supplemental Material: U-Pb speleothem geochronology reveals a major ca. 6 Ma uplift phase along the western margin of Dead Sea Transform

2021 ◽  
Author(s):  
O. Chaldekas ◽  
A. Vaks ◽  
et al.
Keyword(s):  
Research Methods ◽  
Dead Sea ◽  
Geochronological Data ◽  
Dead Sea Transform ◽  
Western Margin ◽  
Analytical Results ◽  
Activity Ratios ◽  
Study Sites ◽  
238U Activity ◽  
Word Document

Description of the study sites, Research Methods, U-Th analytical results and Supplemental Figures (Word Document). Dataset 1: Initial 234U/238U activity ratios of Israeli speleothems. Dataset 2: Raw U-Pb geochronological data.

scholarly journals Supplemental Material: U-Pb speleothem geochronology reveals a major ca. 6 Ma uplift phase along the western margin of Dead Sea Transform

2021 ◽  
Author(s):  
O. Chaldekas ◽  
A. Vaks ◽  
et al.
Keyword(s):  
Research Methods ◽  
Dead Sea ◽  
Geochronological Data ◽  
Dead Sea Transform ◽  
Western Margin ◽  
Analytical Results ◽  
Activity Ratios ◽  
Study Sites ◽  
238U Activity ◽  
Word Document

Description of the study sites, Research Methods, U-Th analytical results and Supplemental Figures (Word Document). Dataset 1: Initial 234U/238U activity ratios of Israeli speleothems. Dataset 2: Raw U-Pb geochronological data.

scholarly journals U-Pb speleothem geochronology reveals a major 6 Ma uplift phase along the western margin of Dead Sea Transform

2021 ◽  
Author(s):  
O. Chaldekas ◽  
A. Vaks ◽  
I. Haviv ◽  
A. Gerdes ◽  
R. Albert
Keyword(s):  
Groundwater Level ◽  
Large Scale ◽  
Plate Boundary ◽  
Dead Sea ◽  
Tectonic Uplift ◽  
Dead Sea Transform ◽  
Western Margin ◽  
Base Level ◽  
Euler Pole ◽  
The Dead

The timing of vertical motions adjacent to the Dead Sea Transform plate boundary is not yet firmly established. We utilize laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) U-Pb geochronology of carbonate cave deposits (speleothems) to constrain paleo-groundwater levels along the western margin of the Dead Sea Transform and provide a proxy for the timing of large-scale incision and tectonic uplift. Phreatic speleothems can form in caves that are located slightly below the groundwater level. Tectonic uplift and/or base level subsidence can trigger incision of canyons and induce a drop in the groundwater table. This can cause dewatering of the caves, cessation of the deposition of phreatic speleothems, and initiation of growth of vadose speleothems. The transition between deposition of phreatic and vadose speleothems can therefore reflect tectonic or erosive events. We obtained 102 U-Pb ages from 32 speleothems collected from three cave complexes across a 150-km-long, north-to-south transect. These ages indicate that phreatic deposition began between 14.68 ± 1.33 and 11.34 ± 1.62and ended by 6.21 ± 0.59 Ma. Later, vadose speleothems grew intermittently until the Quaternary. These results suggest an abrupt drop in the water table starting at ca. 6 Ma with no re-submergence of the caves. We interpret this to indicate river incision of ∼150−200 m that was driven by uplift and folding of the western margin of the Dead Sea Transform and by inland morpho-tectonic, base-level subsidence in the Dead Sea area. The observed timing corresponds with a change in the Euler pole of the plates motion along the Dead Sea Transform. The growth period of phreatic speleothems suggests groundwater level stability and limited vertical tectonic motions between 14 Ma and 6 Ma.

Drainage system reorganization and late Quaternary tectonic deformation along the southern Dead Sea Transform

2018 ◽  
Vol 90 (2) ◽  
pp. 380-393 ◽  
Author(s):  
Yedidia Gellman ◽  
A. Matmon ◽  
Amit Mushkin ◽  
N. Porat
Keyword(s):  
Cross Sections ◽  
Late Quaternary ◽  
Drainage System ◽  
Dead Sea ◽  
Osl Dating ◽  
Arabian Plate ◽  
Tectonic Deformation ◽  
Dead Sea Transform ◽  
Western Margin ◽  
Geomorphic Mapping

AbstractThe Dead Sea Transform (DST) accounts for ~105 km of left-lateral slip between the Arabian plate and the Sinai subplate since the Miocene. Paleoseismic studies along the Arava Valley segment of the DST suggest that late Quaternary deformation has been primarily concentrated along the axis of the transform valley. Here, we examine late Quaternary changes in drainage system characteristics and attribute them to recent tectonic deformation in this region. Field-based geomorphic mapping, topographic cross sections, and optically stimulated luminescence (OSL) dating of fluvial deposits were used to map and date recent changes in the fluvial characteristics of catchments along the western margin of the southern Arava. Our results reveal coeval migration of channels, consistent with tectonically induced surface tilting caused by north–south compressional deformation along the western margin of the transform valley. OSL dating indicates this tilting was initiated in the late Pleistocene and continued at least into the mid-Holocene. The late Quaternary tectonic deformation along the southern Arava segment of the DST is distributed across a wider zone than previously considered and extends out to the margins of the transform valley. We associate the inferred wider deformation zone to possible changes in the geometry of motion along the DST.

Seismic Energy Release from Intra-Basin Sources along the Dead Sea Transform and Its Influence on Regional Ground Motions

2020 ◽  
Author(s):  
Roey Shimony ◽  
Zohar Gvirtzman ◽  
Michael Tsesarsky
Keyword(s):  
Ground Motions ◽  
Seismic Energy ◽  
Sedimentary Basins ◽  
Seismic Wave Propagation ◽  
Dead Sea ◽  
Strike Slip ◽  
Dead Sea Transform ◽  
Bay Area ◽  
The Dead ◽  
Surrounding Areas

ABSTRACT The Dead Sea Transform (DST) dominates the seismicity of Israel and neighboring countries. Whereas the instrumental catalog of Israel (1986–2017) contains mainly M<5 events, the preinstrumental catalog lists 14 M 7 or stronger events on the DST, during the past two millennia. Global Positioning System measurements show that the slip deficit in northern Israel today is equivalent to M>7 earthquake. This situation highlights the possibility that a strong earthquake may strike north Israel in the near future, raising the importance of ground-motion prediction. Deep and narrow strike-slip basins accompany the DST. Here, we study ground motions produced by intrabasin seismic sources, to understand the basin effect on regional ground motions. We model seismic-wave propagation in 3D, focusing on scenarios of Mw 6 earthquakes, rupturing different active branches of the DST. The geological model includes the major structures in northern Israel: the strike-slip basins along the DST, the sedimentary basins accompanying the Carmel fault zone, and the densely populated and industrialized Zevulun Valley (Haifa Bay area). We show that regional ground motions are determined by source–path coupling effects in the strike-slip basins, before waves propagate into the surrounding areas. In particular, ground motions are determined by the location of the rupture nucleation within the basin, the near-rupture lithology, and the basin’s local structure. When the rupture is located in the crystalline basement or along material bridges connecting opposite sides of the fault, ground motions behave predictably, decaying due to geometrical spreading and locally amplified atop sedimentary basins. By contrast, if rupture nucleates or propagates into shallow sedimentary units of the DST strike-slip basins, ground motions are amplified within, before propagating outside. Repeated reflections from the basin walls result in a “resonant chamber” effect, leading to stronger regional ground motions with prolonged durations.

Multiple strike-slip fault sets: A case study from the Dead Sea Transform

Tectonics ◽  
1990 ◽  
Vol 9 (6) ◽  
pp. 1421-1431 ◽  
Author(s):  
H. Ron ◽  
A. Nur ◽  
Y. Eyal
Keyword(s):  
Dead Sea ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Dead Sea Transform ◽  
The Dead

scholarly journals Thermal impacts of magmatic intrusions: a hypothesis of paleo-heating processes in the Tiberias Basin, Jordan-Dead Sea Transform

2017 ◽  
Vol 125 ◽  
pp. 80-87 ◽  
Author(s):  
Nora Koltzer ◽  
Peter Möller ◽  
Nimrod Inbar ◽  
Christian Siebert ◽  
Eliyahu Rosenthal ◽  
...  
Keyword(s):  
Dead Sea ◽  
Dead Sea Transform ◽  
Magmatic Intrusions

scholarly journals The earthquake of 1 January 1837 in Southern Lebanon and N orthern Israel

1997 ◽  
Vol 40 (4) ◽  
Author(s):  
N. N. Ambraseys
Keyword(s):  
Middle East ◽  
20Th Century ◽  
Dead Sea ◽  
Transform Fault ◽  
Earthquake Catalogues ◽  
Dead Sea Transform ◽  
The Past ◽  
Fault Systems ◽  
Heavy Damage

All of our 20th-century information for the Levant Fracture and Dead Sea transform fault systems is for a qui- escent period in the seismicity. This is apparent when we consider earlier events which show that infi.equent earthquakes have occurred in the past along this system, an important consideration for the assessment of haz- ard and tectonics of the Middle East. One of these events was the earthquake of 1837 which caused heavy damage in Northem Israel and Southem Lebanon. This earthquake was a much larger event than earthquake catalogues indicate. We reckon it was a shallow, probably multiple event of magnitude greater than 7.0.

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