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Silantyev, Sergey A; Krasnova, E A; Cannat, Mathilde; Bortnikov, Nikolay S; Kononkova, N N; Beltenev, V E (2011): Chemical and isotopic compositions of rocks and minerals from the Ashadze and Logachev hydrothermal fields, Mid-Atlantic Ridge [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.813402

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Abstract:
This study was aimed at reconstructing a sequence of events in the magmatic and metamorphic evolution of peridotites, gabbroids, and trondhjemites from internal oceanic complexes of the Ashadze and Logachev hydrothermal vent fields. Collections of plutonic rocks from Cruises 22 and 26 of R/V "Professor Logachev", Cruise 41 of R/V "Akademik Mstislav Keldysh", and from the Serpentine Russian-French expedition aboard R/V "Pourquoi pas?" were objects of this study. Data reported here suggest that the internal oceanic complexes of the Ashadze and Logachev fields formed via the same scenario in these two regions of the Mid-Atlantic Ridge. On the other hand, an analysis of petrological and geochemical characteristics of the rocks indicated that the internal oceanic complexes of the MAR axial zone between 12°58'N and 14°45'N show pronounced petrological and geochemical heterogeneity manifested in variations in degree of depletion of mantle residues and in Nd isotopic compositions of rocks from the gabbro-peridotite association. Trondhjemites from the Ashadze hydrothermal field can be considered as partial melting products of gabbroids under influence of hydrothermal fluids. It was supposed that presence of trondhjemites in internal oceanic complexes of MAR can be used as a marker for the highest temperature deep-rooted hydrothermal systems. Perhaps, the region of the MAR axial zone, in which petrologically and geochemically contrasting internal oceanic complexes are spatially superimposed, serves as an area for development of large hydrothermal clusters with considerable ore-forming potential.
Related to:
Silantyev, Sergey A; Krasnova, E A; Bortnikov, Nikolay S; Beltenev, V E; Kononkova, N N; Cannat, Mathilde (2011): Peridotite-gabbro-trondhjemite association of the Mid-Atlantic Ridge between 12°58' and 14°45'N: Ashadze and Logachev hydrothermal vent fields. Translated from Geokhimiya, 2011, 49(4), 339-372, Geochemistry International, 49(4), 323-354, https://doi.org/10.1134/S0016702911040070
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 13.861786 * Median Longitude: -36.415626 * South-bound Latitude: 12.971833 * West-bound Longitude: -44.979710 * North-bound Latitude: 14.753470 * East-bound Longitude: 44.862833
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
14 datasets

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Datasets listed in this publication series

  1. Silantyev, SA; Krasnova, EA; Cannat, M et al. (2011): (Table 2a) Composition of pyroxenes from rocks of the internal oceanic complex in the Ashadze hydrothermal field. https://doi.org/10.1594/PANGAEA.811974
  2. Silantyev, SA; Krasnova, EA; Cannat, M et al. (2011): (Table 2b) Composition of pyroxenes from rocks of the internal oceanic complex in the Logachev hydrothermal field. https://doi.org/10.1594/PANGAEA.811975
  3. Silantyev, SA; Krasnova, EA; Cannat, M et al. (2011): (Table 3a) Composition of amphiboles and garnets from rocks of the internal oceanic complex in the Ashadze hydrothermal field. https://doi.org/10.1594/PANGAEA.811976
  4. Silantyev, SA; Krasnova, EA; Cannat, M et al. (2011): (Table 3b) Composition of amphiboles and garnets from rocks of the internal oceanic complex in the Logachev hydrothermal field. https://doi.org/10.1594/PANGAEA.811977
  5. Silantyev, SA; Krasnova, EA; Cannat, M et al. (2011): (Table 4a) Composition of olivine from rocks of the internal oceanic complex in the Ashadze hydrothermal field. https://doi.org/10.1594/PANGAEA.811979
  6. Silantyev, SA; Krasnova, EA; Cannat, M et al. (2011): (Table 4b) Composition of olivine from rocks of the internal oceanic complex in the Logachev hydrothermal field. https://doi.org/10.1594/PANGAEA.811980
  7. Silantyev, SA; Krasnova, EA; Cannat, M et al. (2011): (Table 5a) Composition of spinel from rocks of the internal oceanic complex of the Ashadze hydrothermal field. https://doi.org/10.1594/PANGAEA.812049
  8. Silantyev, SA; Krasnova, EA; Cannat, M et al. (2011): (Table 5b) Composition of spinel from rocks of the internal oceanic complex of the Logachev hydrothermal field. https://doi.org/10.1594/PANGAEA.812050
  9. Silantyev, SA; Krasnova, EA; Cannat, M et al. (2011): (Table 6a) Chemical composition of rock samples from the Ashadze hydrothermal field. https://doi.org/10.1594/PANGAEA.812051
  10. Silantyev, SA; Krasnova, EA; Cannat, M et al. (2011): (Table 6b) Chemical composition of rock samples from the Logachev hydrothermal field. https://doi.org/10.1594/PANGAEA.812053
  11. Silantyev, SA; Krasnova, EA; Cannat, M et al. (2011): (Table 7a) Rare earth and some trace element contents in rocks of the oceanic core complex from the Ashadze hydrothermal field. https://doi.org/10.1594/PANGAEA.812900
  12. Silantyev, SA; Krasnova, EA; Cannat, M et al. (2011): (Table 7b) Rare earth and some trace element contents in rocks of the oceanic core complex from the Logachev hydrothermal field. https://doi.org/10.1594/PANGAEA.812954
  13. Silantyev, SA; Krasnova, EA; Cannat, M et al. (2011): (Table 8a) Strontium and neodymium isotopic characteristics of rocks from the oceanic core complex of the Ashadze hydrothermal field. https://doi.org/10.1594/PANGAEA.812990
  14. Silantyev, SA; Krasnova, EA; Cannat, M et al. (2011): (Table 8b) Strontium and neodymium isotopic characteristics of rocks from the oceanic core complex of the Logachev hydrothermal field. https://doi.org/10.1594/PANGAEA.813028