FN Archimer Export Format
PT J
TI Semibrittle seismic deformation in high-temperature mantle mylonite shear zone along the Romanche transform fault
BT 
AF Yu, Zhiteng
   Singh, Satish C.
   Gregory, Emma P. M.
   Maia, Marcia
   Wang, Zhikai
   Brunelli, Daniele
AS 1:1;2:1;3:1;4:2,3;5:1;6:4,5;
FF 1:;2:;3:;4:;5:;6:;
C1 Université de Paris, Institut de Physique du Globe de Paris, CNRS, Paris, France.
   CNRS-Université de Bretagne Occidentale, IUEM, France.
   Laboratoire Géosciences Océan, CNRS-UBO UMR 6538, Institut Universitaire Européen de la Mer Rue Dumont d’Urville, 29280 Plouzané France.
   Università di Modena e Reggio Emilia, Modena, Italy.
   Institute for Marine Sciences ISMAR-CNR, Italy.
C2 IPGP, FRANCE
   CNRS, FRANCE
   UBO, FRANCE
   UNIV MODENA & REGGIO EMILIA, ITALY
   CNR ISMAR, ITALY
UM LGO
IN DOAJ
IF 14.98
TC 13
UR https://archimer.ifremer.fr/doc/00689/80070/83089.pdf
   https://archimer.ifremer.fr/doc/00689/80070/83090.pdf
LA English
DT Article
CR SMARTIES
BO Pourquoi pas ?
AB Oceanic transform faults, a key element of plate tectonics, represent the first-order discontinuities along mid-ocean ridges, host large earthquakes, and induce extreme thermal gradients in lithosphere. However, the thermal structure along transform faults and its effects on earthquake generation are poorly understood. Here we report the presence of a 10- to 15-kilometer-thick in-depth band of microseismicity in 10 to 34 kilometer depth range associated with a high-temperature (700° to 900°C) mantle below the brittle lithosphere along the Romanche mega transform fault in the equatorial Atlantic Ocean. The occurrence of the shallow 2016 moment magnitude 7.1 supershear rupture earthquake and these deep microearthquakes indicate that although large earthquakes occur in the upper brittle lithosphere, a substantial amount of deformation is accommodated in the semibrittle mylonitic mantle that resides at depths below the 600°C isotherm. We also observe a rapid westward deepening of this band of seismicity indicating a strong lateral heterogeneity. 
PY 2021
PD APR
SO Science Advances
SN 2375-2548
PU American Association for the Advancement of Science (AAAS)
VL 7
IS 15
UT 000642446300016
DI 10.1126/sciadv.abf3388
ID 80070
ER

EF