FN Archimer Export Format
PT J
TI Seafloor geological studies above active gas chimneys off Egypt (Central nile deep sea fan)
BT 
AF DUPRE, Stephanie
   WOODSIDE, J
   FOUCHER, Jean-Paul
   DE LANGE, G
   MASCLE, J
   BOETIUS, A
   MASTALERZ, V
   STADNITSKAIA, A
   ONDREAS, Helene
   HUGUEN, C
   HARMEGNIES, Francois
   GONTHARET, Swanne
   LONCKE, L
   DEVILLE, E
   NIEMANN, H
   OMOREGIE, E
   OLU, Karine
   FIALA MEDIONI, A
   DAHLMANN, A
   CAPRAIS, Jean-Claude
   PRINZHOFER, A
   SIBUET, Myriam
   PIERRE, C
   DAMSTE, J
AS 1:1;2:1;3:2;4:3;5:4;6:5;7:3;8:6;9:2;10:7;11:2;12:8;13:9;14:10;15:5;16:5;17:11;18:12;19:3;20:11;21:10;22:11;23:8;24:6;
FF 1:;2:;3:PDG-DOP-DCB-GM-LGG;4:;5:;6:;7:;8:;9:PDG-DOP-DCB-GM-LGG;10:;11:PDG-DOP-DCB-GM-CTD;12:PDG-DOP-DCB-GM-LGM;13:;14:;15:;16:;17:PDG-DOP-DCB-EEP-LEP;18:;19:;20:PDG-DOP-DCB-EEP-LEP;21:;22:PDG-DOP-DCB-EEP-LEP;23:;24:;
C1 Vrije Univ Amsterdam, Fac Earth & Life Sci, Sedimentol & Marine Geol Dept, Amsterdam, Netherlands.
   Ifremer, Brest Ctr, Dept Geosci Marines, Plouzane, France.
   Univ Utrecht, Geosci Dept, Utrecht, Netherlands.
   Geosci Azur, Villefranche Sur Mer, France.
   Max Planck Inst Marine Microbiol, Bremen, Germany.
   NIOZ, Texel, Netherlands.
   Univ Perpignan, Perpignan, France.
   LOCEAN, UPMC, Paris, France.
   Univ Amiens, Amiens, France.
   Inst Francais Petr, Rueil Malmaison, France.
   Ifremer, Ctr Brest, Lab Environm Profond, F-29280 Plouzane, France.
   UPMC, Observatoire Océanologique de Banyuls, France
C2 UNIV VRIJE AMSTERDAM, NETHERLANDS
   IFREMER, FRANCE
   UNIV UTRECHT, NETHERLANDS
   UNIV NICE, FRANCE
   INST MAX PLANCK (MARINE MICROBIOL), GERMANY
   INST SEA RESEARCH (NIOZ), NETHERLANDS
   UNIV PERPIGNAN, FRANCE
   UNIV PARIS 06, FRANCE
   UNIV PICARDIE JULES VERNE, FRANCE
   IFP, FRANCE
   IFREMER, FRANCE
   UNIV PARIS 06, FRANCE
SI BREST
SE PDG-DOP-DCB-GM-LGG
   PDG-DOP-DCB-GM-CTD
   PDG-DOP-DCB-GM-LGM
   PDG-DOP-DCB-EEP-LEP
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
IF 1.795
TC 80
TU Centre national de la recherche scientifique
   Institut de recherche pour le développement
   Muséum national d'histoire naturelle
   Université Pierre et Marie Curie
UR https://archimer.ifremer.fr/doc/2007/publication-4455.pdf
LA English
DT Article
CR FANIL
   NAUTINIL
BO Le Suroît
   L'Atalante
DE ;Seafloor morphology;Methane;Authigenic carbonate precipitation;Gas chimneys;Mud breccia;Mud volcanoes;Fluid seepage;Nile fan
AB Four mud volcanoes of several kilometres diameter named Amon, Osiris, Isis, and North Alex and located above gas chimneys on the Central Nile Deep Sea Fan, were investigated for the first time with the submersible Nautile. One of the objectives was to characterize the seafloor morphology and the seepage activity across the mud volcanoes. The seepage activity was dominated by emissions of methane and heavier hydrocarbons associated with a major thermal contribution. The most active parts of the mud volcanoes were highly gas-saturated (methane concentrations in the water and in the sediments, respectively, of several hundreds of nmol/L and several mmol/L of wet sediment) and associated with significantly high thermal gradients (at 10 m below the seafloor, the recorded temperatures reached more than 40 °C). Patches of highly reduced blackish sediments, mats of sulphide-oxidizing bacteria, and precipitates of authigenic carbonate were detected, indicative of anaerobic methane consumption. The chemosynthetic fauna was, however, not very abundant, inhibited most likely by the high and vigorous fluxes, and was associated mainly with carbonate-crust-covered seafloor encountered on the southwestern flank of Amon. Mud expulsions are not very common at present and were found limited to the most active emission centres of two mud volcanoes, where slow extrusion of mud occurs. Each of the mud volcanoes is fed principally by a main narrow channel located below the most elevated areas, most commonly in the centres of the structures. The distribution, shape, and seafloor morphology of the mud volcanoes and associated seeps over the Central Nile Deep Sea Fan are clearly tectonically controlled.
PY 2007
PD JUN
SO Deep Sea Research Part I: Oceanographic Research Papers
SN 0967-0637
PU Elsevier
VL 54
IS 7
UT 000248249400007
BP 1146
EP 1172
DI 10.1016/j.dsr.2007.03.007
ID 4455
ER

EF