TY - JOUR
T1 - A New Approach to Constrain the Seismic Origin for Prehistoric Turbidites as Applied to the Dead Sea Basin
AU - Lu, Yin
AU - Moernaut, Jasper
AU - Bookman, Revital
AU - Waldmann, Nicolas
AU - Wetzler, Nadav
AU - Agnon, Amotz
AU - Marco, Shmuel
AU - Alsop, G. Ian
AU - Strasser, Michael
AU - Hubert-Ferrari, Aurélia
N1 - Publisher Copyright:
© 2020. The Authors.
PY - 2021/2/16
Y1 - 2021/2/16
N2 - The seismic origin of turbidites is verified either by correlating such layers to historic earthquakes, or by demonstrating their synchronous deposition in widely spaced, isolated depocenters. A historic correlation could thus constrain the seismic intensity required for triggering turbidites. However, historic calibration is not applicable to prehistoric turbidites. In addition, the synchronous deposition of turbidites is difficult to test if only one deep core is drilled in a depocenter. Here, we propose a new approach that involves analyzing the underlying in situ deformations of prehistoric turbidites, as recorded in a 457 m-long core from the Dead Sea center, to establish their seismic origin. These in situ deformations have been verified as seismites and could thus authenticate the trigger for each overlying turbidite. Moreover, our high-resolution chemical and sedimentological data validate a previous hypothesis that soft-sediment deformation in the Dead Sea formed at the sediment-water interface.
AB - The seismic origin of turbidites is verified either by correlating such layers to historic earthquakes, or by demonstrating their synchronous deposition in widely spaced, isolated depocenters. A historic correlation could thus constrain the seismic intensity required for triggering turbidites. However, historic calibration is not applicable to prehistoric turbidites. In addition, the synchronous deposition of turbidites is difficult to test if only one deep core is drilled in a depocenter. Here, we propose a new approach that involves analyzing the underlying in situ deformations of prehistoric turbidites, as recorded in a 457 m-long core from the Dead Sea center, to establish their seismic origin. These in situ deformations have been verified as seismites and could thus authenticate the trigger for each overlying turbidite. Moreover, our high-resolution chemical and sedimentological data validate a previous hypothesis that soft-sediment deformation in the Dead Sea formed at the sediment-water interface.
KW - Dead Sea
KW - seismic intensity
KW - seismites
KW - seismogenic sedimentary processes
KW - sof-sediment deformation
KW - turbidites
UR - http://www.scopus.com/inward/record.url?scp=85100961710&partnerID=8YFLogxK
U2 - 10.1029/2020GL090947
DO - 10.1029/2020GL090947
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AN - SCOPUS:85100961710
SN - 0094-8276
VL - 48
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 3
M1 - e2020GL090947
ER -