FN Archimer Export Format
PT J
TI Paleogene V-shaped basins and Neogene subsidence of the Northern Lesser Antilles Forearc
BT 
AF Boucard, M
   Marcaillou, B
   Lebrun, JF
   Laurencin, M
   KLINGELHOEFER, Frauke
   Laigle, M
   Lallemand, S
   Schenini, L
   GRAINDORGE, David
   Cornee, JJ
   Munch, P
   Philippon, M
AS 1:1,2;2:2;3:1;4:3;5:4;6:2;7:5;8:2;9:3;10:1,5;11:5;12:1;13:;
FF 1:;2:;3:;4:;5:PDG-REM-GM-LAD;6:;7:;8:;9:;10:;11:;12:;13:;
C1 Géosciences Montpellier, Université des Antilles, Université de Montpellier, CNRS, Campus de Fouillole, Pointe-à-Pitre, Guadeloupe (FWI), France
   GéoAzur, Université Côte d’Azur, CNRS, Observatoire de la Côte d’Azur, IRD, 250 Avenue Albert Einstein, 06560 Valbonne, France
   Laboratoire Géosciences Océan, CNRS-UBO-UBS, Université Bretagne Pays de Loire (UBL), Brest, Institut Universitaire Européen de la Mer, rue Dumont Durville, F-29280, Plouzané, France.
   Géosciences Marines, Ifremer, ZI de la Pointe de Diable, CS 10070, 29280 Plouzané, France
   Géosciences Montpellier, Université de Montpellier, CNRS, Université des Antilles, Place Eugène Bataillon, 34095 Montpellier, France
C2 UNIV ANTILLES, FRANCE
   UNIV NICE, FRANCE
   UBO, FRANCE
   IFREMER, FRANCE
   UNIV MONTPELLIER, FRANCE
SI BREST
SE PDG-REM-GM-LAD
UM LGO
IN WOS Ifremer UPR
   copubli-france
   copubli-univ-france
IF 5.261
TC 17
UR https://archimer.ifremer.fr/doc/00651/76351/77343.pdf
   https://archimer.ifremer.fr/doc/00651/76351/77344.pdf
   https://archimer.ifremer.fr/doc/00651/76351/82511.pdf
   https://archimer.ifremer.fr/doc/00651/76351/82512.pdf
LA English
DT Article
CR AGUADOMAR
   ANTITHESIS 3
   ANTITHESIS LEG1
   ANTITHESIS LEG2
   GARANTI
   KASHALLOW 2
   SISMANTILLES 1
   SISMANTILLES 2
BO L'Atalante
   Pourquoi pas ?
   Le Suroît
   Le Nadir
DE ;margin tectonic fracturing;northern Lesser Antilles;oblique collision;subduction erosion;subduction zone;vertical motion
AB Oblique collision of buoyant provinces against subduction zones frequently results in  individualizing and rotating regional-scale blocks. In contrast, the collision of the Bahamas  Bank against the Northeastern Caribbean Plate increased the margin convexity triggering  forearc fragmentation into small-scale blocks. This deformation results in a prominent >450- km-long sequence of V-shaped basins that widens trenchward separated by elevated spurs,  in the Northern Lesser Antilles (NLA, i.e. Guadeloupe to Virgin Island). In absence of deep  structure imaging, various competing models were proposed to account for this faults-bounded  Basins-and-Spurs System. High-resolution bathymetric and deep multichannel seismic data  acquired during cruises ANTITHESIS1-3, reveal a drastically different tectonic evolution of the  NLA forearc. During Eocene-Oligocene time, the NLA margin accommodated the Bahamas Bank  collision and the consecutive margin convex bending by trench-parallel extension along N40- 90°-trending normal faults, opening V-shaped valleys in the forearc. Backarc spreading in the  Kalinago Basin and block rotations went along with this tectonic phase, which ends up with tectonic uplifts and an earliest-middle Miocene regional emersion phase. Post middle  Miocene, regional subsidence and tectonic extension in the forearc is partly accommodated  along the newly-imaged N300°-trending, 200-km-long Tintamarre Normal Faults Zone. This  drastic subsidence phase reveals vigorous margin basal erosion, which likely generated the  synchronous westward migration of the volcanic arc. Thus, unlike widely-accepted previous  theoretical models, the first deep seismic images in the NLA forearc show that the NE-SW  faulting and the prominent V-Shaped valleys result from a past and sealed tectonic phase  related to the margin bending and consecutive blocks rotation. 
PY 2021
PD MAR
SO Tectonics
SN 0278-7407
PU European Geosciences Union
VL 40
IS 3
UT 000636359100018
DI 10.1029/2020TC006524
ID 76351
ER

EF