FN Archimer Export Format
PT J
TI Contrasted hydrothermal activity along the South-East Indian Ridge (130°E-140°E): From crustal to ultramafic circulation
BT 
AF BOULART, Cedric
   BRIAIS, Anne
   CHAVAGNAC, Valerie
   REVILLON, Sidonie
   CEULENEER, Georges
   DONVAL, Jean-Pierre
   GUYADER, Vivien
   BARRERE, Fabienne
   FERREIRA, Nicolas
   HANAN, Barry
   HEMOND, Christophe
   MACLEOD, Sarah
   MAIA, Marcia
   MAILLARD, Agnes
   MERKURYEV, Sergey
   PARK, Sung-Hyun
   RUELLAN, Etienne
   SCHOHN, Alexandre
   WATSON, Sally
   YANG, Yun-Seok
AS 1:1;2:2;3:2;4:3;5:2;6:1;7:1;8:2;9:4;10:5;11:4;12:6;13:4;14:2;15:7;16:8;17:2;18:4;19:9;20:8;
FF 1:PDG-REM-GM-LCG;2:;3:;4:;5:;6:PDG-REM-GM-LCG;7:PDG-REM-GM-LCG;8:;9:;10:;11:;12:;13:;14:;15:;16:;17:;18:;19:;20:;
C1 IFREMER, Geosci Marines, Plouzane, France.
   CNES, IRD, Geosci Environm Toulouse, UMR5563,CNRS,UPS, Toulouse, France.
   IUEM, Sedisor Lab Domaines Ocean, Brest, France.
   Inst Univ Europeen Mer, CNRS, Domaines Ocean, Plouzane, France.
   San Diego State Univ, Dept Geol Sci, San Diego, CA 92182 USA.
   Univ Sydney, Sch Geol Sci, Sydney, NSW, Australia.
   IZMIRAN, St Petersburg, Russia.
   Korea Polar Res Inst, Incheon, South Korea.
   Univ Tasmania, IMAS, Hobart, Tas, Australia.
C2 IFREMER, FRANCE
   CNES, FRANCE
   UBO, FRANCE
   UBO, FRANCE
   UNIV SAN DIEGO STATE, USA
   UNIV SYDNEY, AUSTRALIA
   IZMIRAN, RUSSIA
   KOREA POLAR RES INST, SOUTH KOREA
   UNIV TASMANIA, AUSTRALIA
SI BREST
SE PDG-REM-GM-LCG
UM LGO
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
IF 2.981
TC 8
UR https://archimer.ifremer.fr/doc/00387/49821/50400.pdf
   https://archimer.ifremer.fr/doc/00387/49821/50401.pdf
LA English
DT Article
CR STORM
BO L'Atalante
DE ;hydrothermal plumes;mid-ocean ridges;South-East Indian Ridge
AB Using a combined approach of seafloor mapping, MAPR and CTD survey, we report evidence for active hydrothermal venting along the 130°-140°E section of the poorly-known South-East Indian Ridge (SEIR) from the Australia-Antarctic Discordance (AAD) to the George V Fracture Zone (FZ). Along the latter, we report Eh and CH4 anomalies in the water column above a serpentinite massif, which unambiguously testify for ultramafic-related fluid flow. This is the first time that such circulation is observed on an intermediate-spreading ridge. The ridge axis itself is characterized by numerous off-axis volcanoes, suggesting a high magma supply. The water column survey indicates the presence of at least ten distinct hydrothermal plumes along the axis. The CH4:Mn ratios of the plumes vary from 0.37 to 0.65 denoting different underlying processes, from typical basalt-hosted to ultramafic-hosted high-temperature hydrothermal circulation. Our data suggest that the change of mantle temperature along the SEIR not only regulates the magma supply, but also the hydrothermal activity. The distribution of hydrothermal plumes from a ridge segment to another implies secondary controls such as the presence of fractures and faults along the axis or in the axial discontinuities. We conclude from these results that hydrothermal activity along the SEIR is controlled by magmatic processes at the regional scale and by the tectonics at the segment scale, which influences the type of hydrothermal circulation and leads to various chemical compositions. Such variety may impact global biogeochemical cycles, especially in the Southern Ocean where hydrothermal venting might be the only source of nutrients. 
PY 2017
PD JUN
SO Geochemistry Geophysics Geosystems
SN 1525-2027
PU Amer Geophysical Union
VL 18
IS 7
UT 000407477800003
BP 2446
EP 2458
DI 10.1002/2016GC006683
ID 49821
ER

EF