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Lein, Alla Yu; Bogdanova, Olga Yu; Bogdanov, Yury A; Magazina, Larissa O (2007): Chemical and isotopic compositions and age of carbonates from the Lost City hydrothermal field, Mid-Atlantic Ridge [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.765175, Supplement to: Lein, AY et al. (2007): Mineralogical and geochemical features of authigenic carbonates on seepings and hydrothermal fields (by the examples of the Black Sea reefs and the mounds of the Lost City field). Translated from Okeanologiya, 2007, 47(4), 577-593, Oceanology, 47(4), 537-553, https://doi.org/10.1134/S000143700704011X

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Abstract:
Two genetically different types of authigenic carbonate mounds are studied: (1) from an active hydrothermal field related to serpentinite protrusions in a zone of intersection of a transform fracture zone with the Mid-Atlantic Ridge, (2) from an active field of methane seepings in the Dnieper canyon of the Black sea. General geochemical conditions, under which authigenic carbonate formation occurs within these two fields, were found. They include: presence of reduced H2S, H2, and CH4 gases at absence of free oxygen; high alkalinity of waters participating in carbonate formation; similarity of textural and structural features of authigenic aragonite, which represents the initial carbonate mineral of the mounds; paragenesis of aragonite with sulfide minerals; close relation of carbonate mounds with communities of sulfate-reducing and methane-oxidizing microorganisms. A new mechanism of formation of hydrothermal authigenic carbonates is suggested. It implies their microbial sulfate reduction over hydrogen from fluid in the subsurface mixing zone of hydrothermal solution and adjacent seawater.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Latitude: 30.125000 * Longitude: -42.117000
Event(s):
AMK47-4364-M1 * Latitude: 30.125000 * Longitude: -42.117000 * Elevation: -740.0 m * Location: Lost City Hydrothermal Field, Mid-Atlantic Ridge * Campaign: AMK47 * Basis: Akademik Mstislav Keldysh * Method/Device: MIR-1 deep-sea manned submersible (MIR-1)
AMK47-4365-M2 * Latitude: 30.125000 * Longitude: -42.117000 * Elevation: -780.0 m * Location: Lost City Hydrothermal Field, Mid-Atlantic Ridge * Campaign: AMK47 * Basis: Akademik Mstislav Keldysh * Method/Device: MIR-2 deep-sea manned submersible (MIR-2)
AMK47-4366-M * Latitude: 30.125000 * Longitude: -42.117000 * Elevation: -730.0 m * Location: Lost City Hydrothermal Field, Mid-Atlantic Ridge * Campaign: AMK47 * Basis: Akademik Mstislav Keldysh * Method/Device: MIR deep-sea manned submersible (MIR)
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; Bogdanova, OY; Bogdanov, YA et al. (2007): (Table 1) Contents of CaCO3 and isotopic compositions of authigenic aragonites from mounds of the Lost City hydrothermal field. https://doi.org/10.1594/PANGAEA.764079
  2. Lein, AY; Bogdanova, OY; Bogdanov, YA et al. (2007): (Table 2) Contents of rock-forming components in samples from carbonate mounds of the Lost City hydrothemal field. https://doi.org/10.1594/PANGAEA.765160
  3. Lein, AY; Bogdanova, OY; Bogdanov, YA et al. (2007): (Table 3) Trace element contents in aragonites from the Lost City hydrothermal field. https://doi.org/10.1594/PANGAEA.764080
  4. Lein, AY; Bogdanova, OY; Bogdanov, YA et al. (2007): (Table 4) Radiocarbon datings and 87Sr/86Sr ratios in samples from carbonate mounds of the Lost City hydrothermal field. https://doi.org/10.1594/PANGAEA.765161
  5. Lein, AY; Bogdanova, OY; Bogdanov, YA et al. (2007): (Table 5) Chemical composition of aragonite from the Lost City hydrothermal field according to electron microprobe analysis. https://doi.org/10.1594/PANGAEA.765163
  6. Lein, AY; Bogdanova, OY; Bogdanov, YA et al. (2007): (Table 6) Isotopic composition of organic carbon from microbial communities within the Lost City hydrothermal field. https://doi.org/10.1594/PANGAEA.765164