TY  - JOUR
A1  - Mohsen, Amjad
A1  - Asch, Günter
A1  - Mechie, James
A1  - Kind, Rainer
A1  - Hofstetter, Rami
A1  - Weber, Michael H.
A1  - Stiller, M.
A1  - Abu-Ayyash, Khalil
T1  - Crustal structure of the Dead Sea Basin (DSB) from a receiver function analysis
JF  - Geophysical journal international
N2  - 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. These Moho 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.
KW  - Transform faults
KW  - Crustal structure
Y1  - 2011
U6  - https://doi.org/10.1111/j.1365-246X.2010.04853.x
SN  - 0956-540X
VL  - 184
IS  - 1
SP  - 463
EP  - 476
PB  - Wiley-Blackwell
CY  - Malden
ER  - 
TY  - JOUR
A1  - Czuba, Wojciech
A1  - Grad, Marek
A1  - Mjelde, Rolf
A1  - Guterch, Aleksander
A1  - Libak, Audun
A1  - Krüger, Frank
A1  - Murai, Yoshio
A1  - Schweitzer, Johannes
T1  - Continent-ocean-transition across a trans-tensional margin segment: off Bear Island, Barents Sea
JF  - Geophysical journal international
N2  - P>A 410 km long Ocean Bottom Seismometer profile spanning from the Bear Island, Barents Sea to oceanic crust formed along the Mohns Ridge has been modelled by use of ray-tracing with regard to observed P-waves. The northeastern part of the model represents typical continental crust, thinned from ca. 30 km thickness beneath the Bear Island to ca. 13 km within the Continent-Ocean-Transition. Between the Hornsund FZ and the Kn circle divide legga Fault, a 3-4 km thick sedimentary basin, dominantly of Permian/Carboniferous age, is modelled beneath the ca. 1.5 km thick layer of volcanics (Vestbakken Volcanic Province). The P-wave velocity in the 3-4 km thick lowermost continental crust is significantly higher than normal (ca. 7.5 km s-1). We interpret this layer as a mixture of mafic intrusions and continental crystalline blocks, dominantly related to the Paleocene-Early Eocene rifting event. The crystalline portion of the crust within the south-western part of the COT consists of a ca. 30 km wide and ca. 6 km thick high-velocity (7.3 km s-1) body. We interpret the body as a ridge of serpentinized peridotites. The magmatic portion of the ocean crust accreted along the Knipovich Ridge from continental break-up at ca. 35 Ma until ca. 20 Ma is 3-5 km thicker than normal. We interpret the increased magmatism as a passive response to the bending of this southernmost part of the Knipovich Ridge. The thickness of the magmatic portion of the crust formed along the Mohns Ridge at ca. 20 Ma decreases to ca. 3 km, which is normal for ultra slow spreading ridges.
KW  - Controlled source seismology
KW  - Dynamics of lithosphere and mantle
KW  - Crustal structure
KW  - Atlantic Ocean
Y1  - 2011
U6  - https://doi.org/10.1111/j.1365-246X.2010.04873.x
SN  - 0956-540X
VL  - 184
IS  - 2
SP  - 541
EP  - 554
PB  - Oxford Univ. Press
CY  - Oxford
ER  -