FN Archimer Export Format PT J TI Organic, Gas, and Element Geochemistry of Hydrothermal Fluids of the Newly Discovered Extensive Hydrothermal Area in the Wallis and Futuna Region (SW Pacific) BT AF KONN, Cecile DONVAL, Jean-Pierre GUYADER, Vivien ROUSSEL, Erwan FOURRE, E. JEAN-BAPTISTE, P. PELLETER, Ewan CHARLOU, Jean-Luc FOUQUET, Yves AS 1:1;2:1;3:1;4:2;5:3;6:3;7:1;8:1;9:1; FF 1:PDG-REM-GM-LCG;2:PDG-REM-GM-LCG;3:PDG-REM-GM-LCG;4:PDG-REM-EEP-LMEE;5:;6:;7:PDG-REM-GM-LCG;8:PDG-REM-GM-LCG;9:PDG-REM-GM-LCG; C1 IFREMER, Lab Cycles Geochim & Ressources, CS10070, F-29280 Plouzane, France. IFREMER, Lab Microbiol Environm Extremes, F-29280 Plouzane, France. CNRS, UMR 8212, CEA, LSCE,UVSQ, F-91191 Gif Sur Yvette, France. C2 IFREMER, FRANCE IFREMER, FRANCE CNRS, FRANCE SI BREST SE PDG-REM-GM-LCG PDG-REM-EEP-LMEE UM BEEP-LM2E IN WOS Ifremer jusqu'en 2018 DOAJ copubli-france IF 1.437 TC 12 UR https://archimer.ifremer.fr/doc/00431/54245/55571.pdf https://archimer.ifremer.fr/doc/00431/54245/55572.pdf https://archimer.ifremer.fr/doc/00431/54245/55573.mov https://archimer.ifremer.fr/doc/00431/54245/55574.mov https://archimer.ifremer.fr/doc/00431/54245/55575.mov https://archimer.ifremer.fr/doc/00431/54245/57511.pdf LA English DT Article CR FUTUNA FUTUNA 2 LEG1 FUTUNA 2 LEG2 FUTUNA 3 BO L'Atalante AB Two newly discovered hydrothermal vent fields of the Wallis and Futuna region, Kulo Lasi and Fatu Kapa, were sampled for fluid geochemistry. A great geochemical diversity was observed and assigned to the diversity of lithologies as well as the occurrence of various processes. Kulo Lasi fluids likely formed by interaction with fresh volcanic rocks, phase separation, and mixing with magmatic fluid. Conversely, the geochemistry of the Fatu Kapa fluids would be mostly due to water/felsic lavas reactions. In terms of organic geochemistry, fluids from both fields were found to be enriched in formate, acetate, and semivolatile organic compounds (SVOCs): n-alkanes, n-fatty acids, and polyaromatic hydrocarbons (PAHs). Concentrations of SVOCs reached a few ppb at most. The distribution patterns of SVOCs indicated that several processes and sources, at once of biogenic, thermogenic, and abiogenic types, likely controlled organic geochemistry. Although the contribution of each process remains unknown, the mere presence of organics at the μM level has strong implications for metal dispersion (cycles), deposition (ore-forming), and bioavailability (ecosystems), especially as our fluxes estimations suggest that back-arc hosted vent fields could contribute as much as MOR to the global ocean heat and mass budget. PY 2018 SO Geofluids SN 1468-8115 PU Wiley-hindawi IS 7692839 UT 000428401400001 DI 10.1155/2018/7692839 ID 54245 ER EF