FN Archimer Export Format
PT J
TI Large gas hydrate accumulations on the eastern Nankai Trough inferred from new high-resolution 2-D seismic data
BT 
AF NOUZE, Herve
   HENRY, P
   NOBLE, M
   MARTIN, V
   PASCAL, G
AS 1:;2:;3:;4:;5:;
FF 1:PDG-DRO-GM-GEOPHYSIQUE;2:;3:;4:;5:;
C1 Geosci Marines, Ifremer Ctr Brest, F-29280 Plouzane, France.
   Ecole Normale Super, Geol Lab, UMR 8538, Paris, France.
   Ecole Mines Paris, Ctr Rech Geophys, F-77305 Fontainebleau, France.
C2 GEOSCI MARINES, FRANCE
   ECOLE NORMALE SUPER, FRANCE
   ECOLE MINES PARIS, FRANCE
SI BREST
SE PDG-DRO-GM-GEOPHYSIQUE
IN WOS Ifremer jusqu'en 2018
IF 2.378
TC 16
UR https://archimer.ifremer.fr/doc/2004/publication-510.pdf
LA English
DT Article
CR SFJ
BO Le Nadir
DE ;Zone;Model;Ridge;Methane gas;Marine sediments
AB Previous studies have revealed the presence of a widespread Bottom Simulating Reflector (BSR) on the eastern Nankai slope, as well as the occurrence of enigmatic high amplitude reflections that extend well above the BSR. New high-resolution 2-D seismic data were collected on the eastern Nankai slope, during the French-Japanese SFJ cruise in year 2000 and AVA analyses of the enigmatic reflectors are conducted. At the studied location, these analyses suggest that high amplitude anomalies above the BSR delineate the top of gas hydrate rich sediments. Several tens % of the sediment porosity would be filled with gas hydrates between the BSR and a sharp boundary 30 to 60 m above. To account for these observations, we propose that an invasion by free gas of the present day gas hydrate stability zone occurred in the past. Several mechanisms for this intrusion are discussed.
PY 2004
PD JUN
SO Geophysical Research Letters
SN 0094-8276
PU American Geophysical Union
VL 31
IS 13
UT 000222654300001
DI 10.1029/2004GL019848
ID 510
ER

EF