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Bogdanov, Yury A; Bortnikov, Nikolay S; Vikent'ev, Ilya V; Lein, Alla Yu; Gurvich, Evgeny G; Sagalevich, Anatoly M; Simonov, Vladimir A; Ikorsky, S V; Stavrova, Olga O; Apollonov, V N (2002): Composition and age of ores and bottom sediments accumulated within and near the Rainbow hydrothermal field [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.774607, Supplement to: Bogdanov, YA et al. (2002): Mineralogical-geochemical peculiarities of hydrothermal sulfide ores and fluids in the Rainbow Field associated with serpentinites, Mid-Atlantic Ridge (36°14'N). Translated from: Geologiya Rudnykh Mestorozhdeniy, 2002,44(6), 510-542, Geology of Ore Deposits, 44(6), 444-473

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Abstract:
Results of direct geological and geochemical observations of the modern Rainbow hydrothermal field (Mid-Atlantic Ridge, 36°14'N; 33°54'W) carried out from the deep-sea manned Mir submersibles during Cruises 41 and 42 of the R/V Akademik Mstislav Keldysh in 1998-1999 and data of laboratory studies of collected samples are under consideration in the paper. The field lacks neovolcanic rocks and the axial part of the rift is filled in with a serpentinite protrusion. In this field there occur metalliferous sediments, as well as active and relict sulfide edifices composed of sulfide minerals; pyrrhotite, chalcopyrite, isocubanite, sphalerite, marcasite, pyrite, bornite, chalcosine, digenite, magnetite, anhydrite, rare troilite, wurtzite, millerite, and pentlandite have been determined. Sulfide ores are characterized by concentric-zoned textures. During in situ measurements during 35 minutes temperature of hydrothermal fluids was varying within a range from 250 to 350°C. Calculated chemical and isotopic composition of hydrothermal fluid shows elevated concentrations of Cl, Ni, Co, CH4, and H2. Values of d34S of H2S range from +2.4 to +3.1 per mil, of d13C of CH4 from -15.2 to -11.2 per mil, and d13C of CO2 from +1.0 to -4.0 per mil. Fluid inclusions are homogenized at temperatures from 140 to 360°C, whereas salinity of the fluid varies from 4.2 to 8.5 wt %. d34S values of sulfides range from +1.3 to +12.5 per mil. 3He/4He ratio in mineral-forming fluid contained in the fluid inclusions from sulfides of the Rainbow field varies from 0.00000374 to 0.0000101. It is shown that hydrothermal activity in the area continues approximately during 100 ka. It is assumed that the fluid and sulfide edifices contain components from the upper mantle. A hypothesis of phase separation of a supercritical fluid that results in formation of brines is proposed. Hydrothermal activity is related to the tectonic, not volcanic, phase of the Mid-Atlantic Ridge evolution.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 36.232928 * Median Longitude: -33.905823 * South-bound Latitude: 36.226200 * West-bound Longitude: -33.933200 * North-bound Latitude: 36.254200 * East-bound Longitude: -33.899700
Event(s):
AMK41-3839 * Latitude: 36.254200 * Longitude: -33.933200 * Elevation: -3043.0 m * Location: near Rainbow Hydrothermal Field * Campaign: AMK41 * Basis: Akademik Mstislav Keldysh * Method/Device: Gravity corer (GC)
AMK41-3840-1 * Latitude: 36.229833 * Longitude: -33.901667 * Elevation Start: -2250.0 m * Elevation End: -2350.0 m * Location: Rainbow Hydrothermal Field * Campaign: AMK41 * Basis: Akademik Mstislav Keldysh * Method/Device: MIR-1 deep-sea manned submersible (MIR-1)
AMK41-3840-2 * Latitude: 36.229850 * Longitude: -33.902660 * Location: Rainbow Hydrothermal Field * Campaign: AMK41 * Basis: Akademik Mstislav Keldysh * Method/Device: MIR deep-sea manned submersible (MIR)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
9 datasets

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Datasets listed in this publication series

  1. Bogdanov, YA; Bortnikov, NS; Vikent'ev, IV et al. (2002): (Table 1) Chemical composition of sulfide ores from the Rainbow hydrothermal field. https://doi.org/10.1594/PANGAEA.774462
  2. Bogdanov, YA; Bortnikov, NS; Vikent'ev, IV et al. (2002): (Table 3) Chemical composition of iron sulfides and iron disulfides from the Rainbow hydrothermal field. https://doi.org/10.1594/PANGAEA.774558
  3. Bogdanov, YA; Bortnikov, NS; Vikent'ev, IV et al. (2002): (Table 4) Chemical composition of sphalerite from sulfide edifices of the Rainbow hydrothermal field. https://doi.org/10.1594/PANGAEA.774464
  4. Bogdanov, YA; Bortnikov, NS; Vikent'ev, IV et al. (2002): (Table 5) Chemical composition of Cu- and Fe minerals from the Rainbow hydrothermal field. https://doi.org/10.1594/PANGAEA.774559
  5. Bogdanov, YA; Bortnikov, NS; Vikent'ev, IV et al. (2002): (Table 6) Chemical composition of millerite and pentlandite from the Rainbow hydrothermal field. https://doi.org/10.1594/PANGAEA.774560
  6. Bogdanov, YA; Bortnikov, NS; Vikent'ev, IV et al. (2002): (Table 7) Sulfur isotopic composition in sulfides from the Rainbow hydrothermal field. https://doi.org/10.1594/PANGAEA.774601
  7. Bogdanov, YA; Bortnikov, NS; Vikent'ev, IV et al. (2002): (Table 10) Concentration and isotope composition of helium in fluide inclusions from sulfides and rocks of the Rainbow hydrothermal field. https://doi.org/10.1594/PANGAEA.774603
  8. Bogdanov, YA; Bortnikov, NS; Vikent'ev, IV et al. (2002): (Table 11) Composition and age of bottom sediments accumulated near the Rainbow hydrothermal field. https://doi.org/10.1594/PANGAEA.774604
  9. Bogdanov, YA; Bortnikov, NS; Vikent'ev, IV et al. (2002): (Table 12) Radiocarbon age of bottom sediments accumulated near the Rainbow hydrothermal field. https://doi.org/10.1594/PANGAEA.774385