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Lein, Alla Yu; Bogdanov, Yury A; Grichuk, Dmitry V; Rusanov, Igor I; Sagalevich, Anatoly M (2006): Geochemistry of hydrothermal solutions, ores, and biota from hydrothermal fields at the East Pacific Rise axis near 9°50'N [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.745922, Supplement to: Lein, AY et al. (2006): Geochemistry of hydrothermal solutions from 9°50'N at the East Pacific Rise twelve years after eruption of a submarine volcano. Geokhimiya (Geochemistry), No 7, 749-762

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Abstract:
Hydrothermal solutions were examined in a circulation system that started to develop after the 1991 volcanic eruption in the axial segment of the EPR between 9°45'N and 9°52'N. Within twelve years after this eruption, diffusion outflow of hot fluid from fractures in basaltic lavas gave way to focused seeps of hot solutions through channels of hydrothermal sulfide edifices. An example of the field Q demonstrates that from 1991 to 2003 H2S concentrations decreased from 86 to 1 mM/kg, and the Fe/H2S ratio simultaneously increased by factor 1.7. This fact can explain disappearance of microbial mats that were widespread within the fields before 1991. S isotopic composition of H2S does not depend on H2S concentration. This fact testifies rapid evolution of the hydrothermal system in the early years of its evolution. Carbon in CH4 from hot fluid sampled in 2003 is richer in 12C isotope than carbon in fluid from the hydrothermal field at 21°N EPR. It suggests that methane comes to the Q field from more than one source. Composition of particulate matter in hydrothermal solutions indicates that it was contributed by biological material. Experimental solutions with labeled substrates (t<70°C) show evidence of active processes of methane oxidation and sulfate reduction. Our results indicate that, during 12-year evolution of the hydrothermal system, composition of its solutions evolved and approached compositions of solutions in mature hydrothermal systems of the EPR.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 9.849155 * Median Longitude: -104.290352 * South-bound Latitude: 9.838300 * West-bound Longitude: -104.294000 * North-bound Latitude: 9.897667 * East-bound Longitude: -104.256833
Date/Time Start: 2003-09-05T00:00:00 * Date/Time End: 2003-10-02T00:00:00
Event(s):
AMK49-4622-M1 * Latitude: 9.843100 * Longitude: -104.292000 * Date/Time: 2003-09-05T00:00:00 * Location: Hydrothermal area 9°50N, EPR * Campaign: AMK49 * Basis: Akademik Mstislav Keldysh * Method/Device: MIR-1 deep-sea manned submersible (MIR-1)
AMK49-4623-M2 * Latitude: 9.843100 * Longitude: -104.292000 * Date/Time: 2003-09-05T00:00:00 * Location: Hydrothermal area 9°50N, EPR * Campaign: AMK49 * Basis: Akademik Mstislav Keldysh * Method/Device: MIR-2 deep-sea manned submersible (MIR-2)
AMK49-4625-M1 * Latitude: 9.838300 * Longitude: -104.290800 * Date/Time: 2003-09-06T00:00:00 * Location: Hydrothermal area 9°50N, EPR * Campaign: AMK49 * Basis: Akademik Mstislav Keldysh * Method/Device: MIR-2 deep-sea manned submersible (MIR-2)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
6 datasets

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Datasets listed in this publication series

  1. Lein, AY; Bogdanov, YA; Grichuk, DV et al. (2006): (Table 1) Parameters of hydrothermal solutions from the axis of the East Pacific Rise near 9°50'N. https://doi.org/10.1594/PANGAEA.745900
  2. Lein, AY; Bogdanov, YA; Grichuk, DV et al. (2006): (Table 3) Chemical composition of hot fluids (end members) from the Q hydrothermal field, East Pacific Rise. https://doi.org/10.1594/PANGAEA.745901
  3. Lein, AY; Bogdanov, YA; Grichuk, DV et al. (2006): (Table 4) Isotopic composition of sulfur and organic carbon in sulfide ores from hydrothermal fields at the axis of the East Pacific Rise near 9°50'N. https://doi.org/10.1594/PANGAEA.745902
  4. Lein, AY; Bogdanov, YA; Grichuk, DV et al. (2006): (Table 5) Concentration of particulate organic carbon and its isotopic composition in water samples from hydrothermal fields at the axis of the East Pacific Rise near 9°50'N. https://doi.org/10.1594/PANGAEA.745910
  5. Lein, AY; Bogdanov, YA; Grichuk, DV et al. (2006): (Table 6) Isotopic composition of carbon in tissues of mollusks from hydrothermal fields at the axis of the East Pacific Rise near 9°50'N. https://doi.org/10.1594/PANGAEA.745920
  6. Lein, AY; Bogdanov, YA; Grichuk, DV et al. (2006): (Table 7) Rates of microbiological processes in hot and warm solutions within hydrothermal fields at the axis of the East Pacific Rise near 9°50'N. https://doi.org/10.1594/PANGAEA.745921