FN Archimer Export Format
PT J
TI Earth tides can reactivate shallow faults and trigger seabed methane emissions
BT 
AF Sultan, Nabil
   Riboulot, Vincent
   Dupré, Stéphanie
   Garziglia, Sebastien
   Ker, Stephan
AS 1:1;2:1;3:1;4:1;5:1;
FF 1:PDG-REM-GEOOCEAN-ALMA;2:PDG-REM-GEOOCEAN-ALMA;3:PDG-REM-GEOOCEAN-ALMA;4:PDG-REM-GEOOCEAN-ALMA;5:PDG-REM-GEOOCEAN-ALMA;
C1 Geo-Ocean UMR6538, Ifremer, 29280 Plouzané, France
C2 IFREMER, FRANCE
SI BREST
SE PDG-REM-GEOOCEAN-ALMA
UM GEO-OCEAN
TC 0
UR https://archimer.ifremer.fr/doc/00840/95236/102986.pdf
LA English
DT Article
CR GHASS
   GHASS2
BO Pourquoi pas ?
DE ;faults;hydrates;Methane emissions;pore-pressure;solid Earth tides
AB The role of solid Earth tide in fault reactivation has significant implications for understanding earthquake triggering, carbon sequestration, and the global carbon budget. Despite extensive research on this topic over the years, the relationship between Earth tide and fault reactivation remains unclear. In this study, we investigate the potential influence of solid Earth tide on the reactivation of sub-seabed fractures and faults, which may lead to the release of methane from the seabed. For a period of two weeks, we monitored the sub-seabed temperature and pore-fluid pressure at two sites on an over-pressured fault system located in the Black Sea. Our observations revealed that, despite the ~790 m distance between the two sites, the response in terms of methane discharge was synchronous during the measurement period. Our analysis showed that the presence of over-pressured fluid promotes fault reactivation under solid Earth tide cycles, resulting in synchronized degassing events. We also showed that that these faults can be reactivated with relatively low stresses, no greater than 2 kPa, illustrating the fragile equilibrium of these greenhouse gas laden systems. 
PY 2023
PD APR
SO EarthArxiv
PU California Digital Library (CDL)
DI 10.31223/X5237Q
ID 95236
ER

EF