Gablina, I F; Demina, Lyudmila L; Dmitrenko, Olga B; Os'kina, Natalia S; Popova, E A; Khusid, Tatyana A; Shilov, V V (2011): Microfossils and chemical elements in bottom sediments of the Ashadze-1 Hydrothermal Field (tropical Mid-Atlantic Ridge) [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.785138, Supplement to: Gablina, IF et al. (2011): Composition and secondary alterations of microfossils in sediments of the Ashadze-1 Hydrothermal Field (tropical Mid-Atlantic Ridge). Translated from Okeanologiya, 2011, 51(3), 505-520, Oceanology, 51(3), 476-490, https://doi.org/10.1134/S0001437011030052
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Abstract:
The first thorough analysis of microfossils from ore-bearing sediments of the Ashadze-1 Hydrothermal Field in the Mid-Atlantic Ridge sampled during Cruise 26 of R/V Professor Logachev in 2005 revealed substantial influence of hydrothermal processes on preservation of planktonic calcareous organisms as well as on preservation and composition of benthic foraminifera. From lateral and vertical distribution patterns and secondary alterations of microfossils it is inferred that the main phase of hydrothermal mineralization occurred in Holocene. Heavy metals (Cu, Co, Cr, and Ag) were accumulated by foraminiferal tests and in their enveloping Fe-Mn crusts. Distribution of authigenic minerals replacing foraminiferal tests demonstrates local zoning related to hydrothermal activity. There are three mineral-geochemical zones defined: sulfide zone, zone with elevated Mg content, and zone of Fe-Mn crusts.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 12.972990 * Median Longitude: -16.697574 * South-bound Latitude: 12.972150 * West-bound Longitude: -44.863033 * North-bound Latitude: 12.974367 * East-bound Longitude: 44.862833
Event(s):
PL26-1437 * Latitude: 12.972550 * Longitude: -44.863033 * Location: Ashadze-1 Hydrothermal Field, Mid-Atlantic Ridge * Method/Device: Box corer (BC)
PL26-1475 * Latitude: 12.972617 * Longitude: -44.862867 * Location: Ashadze-1 Hydrothermal Field, Mid-Atlantic Ridge * Method/Device: Vibro corer (VC)
PL26-1508 * Latitude: 12.972500 * Longitude: -44.863000 * Elevation: -4120.0 m * Location: Ashadze hydrothermal field * Campaign: PL26 * Basis: Professor Logachev * Method/Device: Dredge (DRG)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets
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Datasets listed in this publication series
- Gablina, IF; Demina, LL; Dmitrenko, OB et al. (2011): (Table 1) Contents of rock-forming and ore elements in air dried matter of bottom sediments from the Ashadze-1 Hydrothermal Field. https://doi.org/10.1594/PANGAEA.785133
- Gablina, IF; Demina, LL; Dmitrenko, OB et al. (2011): (Table 2) Relative contents of planktonic foraminifera in bottom sediments from the Ashadze-1 Hydrothermal Field. https://doi.org/10.1594/PANGAEA.785135
- Gablina, IF; Demina, LL; Dmitrenko, OB et al. (2011): (Table 3) Abundance of benthic foraminifera and ostracoda in bottom sediments from the Ashadze-1 Hydrothermal Field. https://doi.org/10.1594/PANGAEA.785136
- Gablina, IF; Demina, LL; Dmitrenko, OB et al. (2011): (Table 4) Concentrations of chemical elements in tests of planktonic and benthic foraminifera from bottom sediments of the Ashadze-1 Hydrothermal Field. https://doi.org/10.1594/PANGAEA.785137