FN Archimer Export Format
PT J
TI Paleomagnetic rotations in the northeastern Caribbean region reveal major intraplate deformation since the Eocene
BT 
AF Montheil, Leny
   Philippon, Mélody
   Münch, Philippe
   Camps, Pierre
   Vaes, Bram
   Cornée, Jean‐Jacques
   Poidras, Thierry
   van Hinsbergen, Douwe J.J.
AS 1:1;2:2;3:1;4:1;5:3;6:2;7:1;8:3;
FF 1:;2:;3:;4:;5:;6:;7:;8:;
C1 Geosciences Montpellier (UMR 5243 CNRS/UM/Université des Antilles) Université de Montpellier Montpellier, France
   Geosciences Montpellier (UMR 5243 CNRS/UM/Université des Antilles) Université des Antilles Pointe‐à‐Pitre, France
   Department of Earth Sciences Utrecht University Utrecht ,the Netherlands
C2 UNIV MONTPELLIER, FRANCE
   UNIV ANTILLES, FRANCE
   UNIV UTRECHT, NETHERLANDS
IF 4.2
TC 4
UR https://archimer.ifremer.fr/doc/00846/95785/103623.pdf
   https://archimer.ifremer.fr/doc/00846/95785/103624.docx
   https://archimer.ifremer.fr/doc/00846/95785/103625.xlsx
LA English
DT Article
CR GARANTI
   GWADASEIS
BO L'Atalante
   Le Suroît
DE ;paleomagnetism;paleo-rotation;Caribbean plate;intraplate deformation
AB Relative Caribbean-North American plate motion is partitioned over the trench and intra-Caribbean plate faults that bound large scale tectonic blocks. Quantifying the kinematic evolution of this tectonic corridor is challenging because much of the region is submarine. We present an extensive regional paleomagnetic dataset (1330 cores from 136 sampling locations) from Eocene and younger rocks of the northern Lesser Antilles, the Virgin Islands, and Puerto Rico, and use a statistical bootstrapping approach to quantify vertical axis block rotations. Our results show that the Puerto Rico–Virgin Island (PRVI) block and the Northern Lesser Antilles (NoLA) block formed two coherently rotating domains that both underwent at least 45° counterclockwise rotation since the Eocene. The first ∼20° occurred in tandem in late Eocene and Oligocene time, after which the blocks were separated in the Miocene by the opening of the Anegada Passage. The last 25° of rotation of the PRVI block ended in the middle Miocene, whereas the NoLA block rotated slower, until the latest Miocene. The boundary between the NoLA block and a non-rotated Southern Lesser Antilles was likely the Monserrat-Harvers fault zone. These results require hundreds of kilometers of intra-Caribbean motions with oroclinal bending of the trench or forearc sliver motion along the curved plate boundary as endmembers. These data invite a critical re-evaluation of the kinematic reconstruction of Caribbean-North American plate motion. The consequent changes in paleogeography may provide a new view on the enigmatic eastern Caribbean paleo-biogeography and the Paleogene dispersal of South American mammals toward the Greater Antilles. 
PY 2023
PD AUG
SO Tectonics
SN 0278-7407
PU American Geophysical Union (AGU)
VL 42
IS 8
UT 001050611900001
DI 10.1029/2022TC007706
ID 95785
ER

EF