FN Archimer Export Format
PT J
TI Warm brine lakes in craters of active mud volcanoes, Menes caldera off NW Egypt: evidence for deep-rooted thermogenic processes
BT 
AF DUPRE, Stephanie
   MASCLE, Jean
   FOUCHER, Jean-Paul
   HARMEGNIES, Francois
   WOODSIDE, John
   PIERRE, Catherine
AS 1:1;2:2;3:1;4:1;5:3;6:4;
FF 1:PDG-REM-GM-LGG;2:;3:PDG-REM-GM-LGG;4:PDG-REM-GM;5:;6:;
C1 IFREMER, F-29280 Plouzane, France.
   Observ Oceanol, F-06235 Villefranche Sur Mer, France.
   Vrije Univ Amsterdam, NL-1081 HV Amsterdam, Netherlands.
   Univ Paris 06, LOCEAN, UMR 7159, F-75252 Paris 05, France.
C2 IFREMER, FRANCE
   UNIV PARIS 06, FRANCE
   UNIV VRIJE AMSTERDAM, NETHERLANDS
   UNIV PARIS 06, FRANCE
SI BREST
   PARIS
SE PDG-REM-GM-LGG
   PDG-REM-GM
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
IF 2.122
TC 23
UR https://archimer.ifremer.fr/doc/00185/29668/28151.pdf
LA English
DT Article
CR FANIL
   MEDECO
   MIMES
BO Le Suroît
   Unknown
   Pelagia
AB The Menes caldera is a fault-controlled depression (~8 km in diameter) at ~3,000 m water depth in the western province of the Nile deep-sea fan off NW Egypt, comprising seven mud volcanoes (MVs) of which two are active. Based on multichannel and chirp seismic data, temperature profiles, and high-resolution bathymetric data collected during the 2000 Fanil, 2004 Mimes and 2007 Medeco2 expeditions, the present study investigates factors controlling MV morphology, the geometry of feeder channels, and the origin of emitted fluids. The active Cheops and Chephren MVs are 1,500 m wide with subcircular craters at their summits, about 250 m in diameter, generally a few tens of metres deep, and filled with methane-rich muddy brines with temperatures reaching 42 °C and 57 °C respectively. Deployments of CTDs and corers with attached temperature sensors tracked these warm temperatures down to almost 0.5 km depth below the brine lake surface at the Cheops MV, in a feeder channel probably only a few tens of metres wide. Thermogenic processes involve the dissolution of Messinian evaporites by warm fluids likely sourced even deeper, i.e. 1.7 and 2.6 km below the seabed at the Cheops and Chephren MVs respectively, and which ascend along listric faults. Seepage activity appears broadly persistent since the initiation of mud volcanism in the Early Pliocene, possibly accompanied by lateral migration of feeder channels.
PY 2014
PD JUL
SO Geo-marine Letters
SN 0276-0460
PU Springer
VL 34
IS 2-3
UT 000336392800005
BP 153
EP 168
DI 10.1007/s00367-014-0367-1
ID 29668
ER

EF