FN Archimer Export Format
PT J
TI Neotectonics of the Owen Fracture Zone (NW Indian Ocean): Structural evolution of an oceanic strike-slip plate boundary
BT 
AF RODRIGUEZ, M.
   FOURNIER, M.
   CHAMOT-ROOKE, Nicolas
   HUCHON, P.
   BOURGET, Julien
   SORBIER, M.
   ZARAGOSI, S.
   RABAUTE, A.
AS 1:1,2;2:1;3:2;4:1;5:3;6:2;7:3;8:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;
C1 Univ Paris 06, Inst Sci Terre Paris, CNRS, UMR 7193, F-75252 Paris 05, France.
   Ecole Normale Super, Geol Lab, UMR 8538, F-75231 Paris 05, France.
   Univ Bordeaux 1, UMR EPOC 5805, F-33405 Talence, France.
C2 UNIV PARIS 06, FRANCE
   ENS, FRANCE
   UNIV BORDEAUX, FRANCE
IF 3.021
TC 16
TU Centre national de la recherche scientifique
   Collège de France
   Université Pierre et Marie Curie
   Université de Bordeaux
   Université de Cergy-Pontoise
   École normale supérieure de Paris
   École pratique des hautes études
UR https://archimer.ifremer.fr/doc/00133/24426/22435.pdf
LA English
DT Article
CR OWEN
   TV_DJIBOUTI_SALALAH
BO Beautemps-Beaupré
DE ;Indian Ocean;Owen Fracture Zone;pull-apart;transform fault
AB The Owen Fracture Zone is a 800 km-long fault system that accommodates the dextral strike-slip motion between India and Arabia plates. Because of slow pelagic sedimentation rates that preserve the seafloor expression of the fault since the Early Pliocene, the fault is clearly observed on bathymetric data. It is made up of a series of fault segments separated by releasing and restraining bends, including a major pull-apart basin at latitude 20 degrees N. Some distal turbiditic channels from the Indus deep-sea fan overlap the fault system and are disturbed by its activity, thus providing landmarks to date successive stages of fault activity and structural evolution of the Owen Fracture Zone from Pliocene to Present. We determine the durability of relay structures and the timing of their evolution along the principal displacement zone, from their inception to their extinction. We observe subsidence migration in the 20 degrees N basin, and alternate activation of fault splays in the vicinity of the Qalhat seamount. The present-day Owen Fracture Zone is the latest stage of structural evolution of the 20-Myr-old strike-slip fault system buried under Indus turbiditic deposits whose activity started at the eastern foot of the Owen Ridge when the Gulf of Aden opened. The evolution of the Owen Fracture Zone since 3-6 Myr reflects a steady state plate motion between Arabia and India, such as inferred by kinematics for the last 20 Myr period. The structural evolution of the Owen Fracture Zone since 20 Myr, including fault segments propagation and migration, pull-apart basin opening and extinction, seems to be characterized by a progressive reorganization of the fault system, and does not require any major kinematics change.
PY 2011
PD DEC
SO Geochemistry Geophysics Geosystems
SN 1525-2027
PU Amer Geophysical Union
VL 12
IS 12
UT 000298251800001
BP 1
EP 24
DI 10.1029/2011GC003731
ID 24426
ER

EF