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Articles & Research
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Data Resources Category
Data Resources Category |
Scientific Paper |
Research
Title |
Crustal structure of the Dead Sea Basin (DSB) from a Receiver Function Analysis |
Published by
(sources) |
Geophysical Journal International, 184, 1, 463-476 |
Carried out by
(authors) |
Ayman Mohsen |
Issue Year |
2011 |
Abstract |
The
Dead Sea Transform (DST) is a major left-lateral strike-slip fault that
accommodates the relative motion between the African and Arabian plates,
connecting a region of extension in the Red Sea to the Taurus collision zone in
Turkey over a length of about 1100 km. The Dead Sea Basin (DSB) is one of the
largest basins along the DST. The DSB is a morphotectonic depression along the
DST, divided into a northern and a southern sub-basin, separated by the Lisan
salt diapir.We report on a receiver function study of the crust within the multidisciplinary
geophysical project, DEad Sea Integrated REsearch (DESIRE), to study the
crustal structure of the DSB. A temporary seismic network was operated on both
sides of the DSB between 2006 October and 2008 April. The aperture of the
network is approximately 60 km in the E–W direction crossing the DSB on the
Lisan peninsula and about 100 km in the N–S direction. Analysis of receiver
functions from the DESIRE temporary network indicates that Moho depths vary
between 30 and 38 km beneath the area. TheseMoho depth estimates are consistent
with results of near-vertical incidence and wide-angle controlled-source
techniques. Receiver functions reveal an additional discontinuity in the lower
crust, but only in the DSB and west of it. This leads to the conclusion that
the internal crustal structure east and west of the DSB is different at the
present-day. However, if the 107 km left-lateral movement along the DST is
taken into account, then the region beneath the DESIRE array where no lower
crustal discontinuity is observed would have lain about 18 Ma ago immediately
adjacent to the region under the previous DESERT array west of the DST where no
lower crustal discontinuity is recognized.
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