FN Archimer Export Format
PT J
TI Multiphased tectonic evolution of the Central Algerian margin from combined wide-angle and reflection seismic data off Tipaza, Algeria
BT 
AF LEPRETRE, Angelique
   KLINGELHOEFER, Frauke
   GRAINDORGE, David
   SCHNURLE, Philippe
   BESLIER, M. O.
   YELLES, K.
   DEVERCHERE, Jacques
   BRACENE, R.
AS 1:1;2:2;3:1;4:2;5:3;6:4;7:1;8:5;
FF 1:PDG-REM-GM-LGG;2:PDG-REM-GM-LGG;3:;4:PDG-REM-GM-LGG;5:;6:;7:;8:;
C1 Univ Bretagne Occidentale, Inst Univ Europeen Mer, UMR 6538, Domaines Ocean, F-29280 Plouzane, France.
   IFREMER, Dept Marine Geosci, Plouzane, France.
   Univ Nice Sophia Antipolis, CNRS, UMR 7329, Observ Cote Azur, Valbonne, France.
   Ctr Rech Astron Astrophys & Geophys, Algiers, Algeria.
   SONATRACH Explorat, Boumerdes, Algeria.
C2 UBO, FRANCE
   IFREMER, FRANCE
   UNIV NICE, FRANCE
   CRAAG, ALGERIA
   SONATRACH EXPLORAT, ALGERIA
SI BREST
SE PDG-REM-GM-LGG
   UBO
   IUEM
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
TC 43
UR https://archimer.ifremer.fr/doc/00152/26333/24412.pdf
LA English
DT Article
CR MARADJA
   MARADJA/2
   SPIRAL
BO Le Suroît
   L'Atalante
DE ;Algerian margin;Crustal structure;Wide-angle seismic data;Multiphased tectonic evolution;Western Mediterranean back-arc basins;Contractional reactivation
AB The origin of the Algerian margin remains one of the key questions still discussed in the Western Mediterranean sea, due to the imprecise nature and kinematics of the associated basin during the Neogene. For the first time, the deep structure of the Maghrebian margin was explored during the SPIRAL seismic survey. In this work, we present a N-S transect off Tipaza (west of Algiers), a place where the margin broadens due to a topographic high (Khayr-al-Din Bank). New deep penetration seismic profiles allow us to image the sedimentary sequence in the Algerian basin and the crustal structure at the continent-ocean boundary. Modeling of the wide-angle data shows thinning of the basement, from more than 15km in the continental upper margin to only 5–6km of oceanic-type basement in the Algerian basin, and reveals a very narrow or absent transitional zone. Analysis of the deep structure of the margin indicates features inherited from its complex evolution: (1) an oceanic-type crust in the deep basin, (2) similarities with margins formed in a transform-type setting, (3) a progressive deepening of the whole sedimentary cover, and the thickening of the Plio-Quaternary sediments at the margin foot, coeval with (4) a downward flexure of the basement in the basin. These features argue for a multiphased evolution of the margin, including (1) an early stage of rifting and/or spreading, (2) a late transcurrent episode related to the westward migration of the Alboran domain, and (3) a diffuse Plio-Quaternary compressional reactivation of the margin.
PY 2013
PD AUG
SO Journal Of Geophysical Research-solid Earth
SN 0148-0027
PU Amer Geophysical Union
VL 118
IS 8
UT 000324991900003
BP 3899
EP 3916
DI 10.1002/jgrb.50318
ID 26333
ER

EF