FN Archimer Export Format
PT J
TI Pore fluid chemistry of the North Anatolian Fault Zone in the Sea of Marmara: A diversity of sources and processes
BT 
AF TRYON, M. D.
   HENRY, P.
   CAGATAY, M. N.
   ZITTER, T. A. C.
   GELI, Louis
   GASPERINI, L.
   BURNARD, P.
   BOURLANGE, S.
   GRALL, Celine
AS 1:1;2:2;3:3;4:2;5:4;6:5;7:6;8:6;9:2;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;
C1 Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
   Coll France, Chaire Geodynam, CEREGE, F-13545 Aix En Provence 04, France.
   Istanbul Tech Univ, Dept Geol, Fac Mines, TR-34469 Istanbul, Turkey.
   IFREMER, Dept Marine Geosci, F-29280 Plouzane, France.
   CNR, ISMAR, I-40129 Bologna, Italy.
   CRPG, F-54501 Vandoeuvre Les Nancy, France.
C2 UNIV CALIF SAN DIEGO, USA
   COLL FRANCE, FRANCE
   UNIV TECH ISTANBUL, TURKEY
   IFREMER, FRANCE
   CNR, ITALY
   CRPG, FRANCE
SI BREST
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-int-hors-europe
   copubli-sud
IF 3.368
TC 31
TU Aix-Marseille université
   Centre national de la recherche scientifique
   Collège de France
   Institut de recherche pour le développement
   Université de Lorraine
UR https://archimer.ifremer.fr/doc/00017/12809/9759.pdf
LA English
DT Article
CR MARMARASCARPS
   MARNAUT
   VT 67 / MARMARA VT
BO L'Atalante
   Marion Dufresne
DE ;pore fluid;fluid seeps;marine hydrogeology;methane seeps;Sea of Marmara;North Anatolian Fault
AB As part of the 2007 Marnaut cruise in the Sea of Marmara, an investigation of the pore fluid chemistry of sites along the Main Marmara Fault zone was conducted. The goal was to define the spatial relationship between active faults and fluid outlets and to determine the sources and evolution of the fluids. Sites included basin bounding transtensional faults and strike-slip faults cutting through the topographic highs. The basin pore fluids are dominated by simple mixing of bottom water with a brackish, low-density Pleistocene Lake Marmara end-member that is advecting buoyantly and/or diffusing from a relatively shallow depth. This mix is overprinted by shallow redox reactions and carbonate precipitation. The ridge sites are more complex with evidence for deep-sourced fluids including thermogenic gas and evidence for both silicate and carbonate diagenetic processes. One site on the Western High displayed two mound structures that appear to be chemoherms atop a deep-seated fluid conduit. The fluids being expelled are brines of up to twice seawater salinity with an exotic fluid chemistry extremely high in Li, Sr, and Ba. Oil globules were observed both at the surface and in cores, and type II gas hydrates of thermogenic origin were recovered. Hydrate formation near the seafloor contributes to increase brine concentration but cannot explain their chemical composition, which appears to be influenced by diagenetic reactions at temperatures of 75 degrees C-150 degrees C. Hence, a potential source for fluids at this site is the water associated with the reservoir from which the gas and oil is seeping, which has been shown to be related to the Thrace Basin hydrocarbon system. Our work shows that submerged continental transform plate boundaries can be hydrologically active and exhibit a diversity of sources and processes.
PY 2010
PD OCT
SO Geochemistry Geophysics Geosystems
SN 1525-2027
PU Amer Geophysical Union
VL 11
UT 000283746000001
BP 1
EP 22
DI 10.1029/2010GC003177
ID 12809
ER

EF