FN Archimer Export Format
PT J
TI Crustal structure of the NW Moroccan margin from deep seismic data (SISMAR Cruise)
BT 
AF JAFFAL, Mohammed
   KLINGELHOEFER, Frauke
   MATIAS, Luis
   TEIXEIRA, Fernando
   AMRHAR, Mostafa
AS 1:1;2:2;3:3;4:3;5:4;
FF 1:;2:PDG-DOP-DCB-GM-LGG;3:;4:;5:;
C1 Fac Sci & Tech, Dept Sci Terre, Lab Georessources, Marrakech 4000, Morocco.
   IFREMER, Dept Marine Geosci, F-29280 Plouzane, France.
   Univ Lisbon, Ctr Geofis, P-1749016 Lisbon, Portugal.
   Fac Sci Semlalia, Dept Geol, Marrakech, Morocco.
C2 FAC SCI & TECH, MOROCCO
   IFREMER, FRANCE
   UNIV LISBON, PORTUGAL
   FAC SCI SEMLALIA, MOROCCO
SI BREST
SE PDG-DOP-DCB-GM-LGG
IN WOS Ifremer jusqu'en 2018
   copubli-europe
   copubli-int-hors-europe
   copubli-sud
IF 0.931
TC 18
UR https://archimer.ifremer.fr/doc/2009/publication-6588.pdf
LA English
DT Article
CR SISMAR
BO Le Nadir
DE ;Morocco;Passive margin;Gravity;OBS;Velocity model;Deep seismic
AB During the SISMAR cruise (spring 2001), new deep seismic data were acquired on the Atlantic Moroccan margin. The purpose of the present work is to analyse and to interpret a part of the data consisting of four wide-angle seismic profiles (4, 5, 8 and 10) recorded offshore El Jadida. Lines 4 and 5, perpendicular to the margin, show a crustal thickness of 35 km under the western Moroccan Meseta which thins progressively seaward where it reaches a minimum thickness of 10 km. The calculated velocity models show that this crust consists of two crustal layers overlain by a sedimentary cover corresponding to the post-Paleozoic sediments, characterised by a low velocity. The detailed shallow structure is obtained primarily from multichannel seismic data. Half grabens are imaged and display deeper basins located at the foot of the continental slope where the sedimentary cover reaches a maximum thickness of 6 km. The sedimentary strata are disrupted by salt migration along faults and forming diapirs. The first crustal unit corresponds to the upper crust, with p-wave velocities ranging from 6 km/s at the top to 6.5 km/s at the base. The lower crust represented by the second unit is characterized by velocities increasing from 6.7 to 7.5 km/s at the base of the lower crust.
PY 2009
PD JUL
SO Comptes Rendus Geoscience
SN 1631-0713
PU Elsevier
VL 341
IS 6
UT 000267685000006
BP 495
EP 503
DI 10.1016/j.crte.2009.04.003
ID 6588
ER

EF