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Udintsev, Gleb B; Beresnev, Alexander F; Golod, V M; Kol'tsova, A V; Kurentsova, Natalia A; Zakharov, M V; Agapova, Galina V; Volokitina, Lyudmila P; Udintsev, Vladimir G (1996): Rocks and minerals from the Strakhov Fracture Zone, 4°N Mid-Atlantic Ridge [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.759782, Supplement to: Udintsev, GB et al. (1996): Geological structure of the Strakhov fracture zone (equatorial segment of the Mid-Atlantic Ridge). Oceanology, 35(4), 544-558

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Abstract:
Geological-geophysical data obtained during Cruises 7, 11, and 12 of R/V Akademic Nikolay Strakhov (1989-1991) within the international project EQUARIDGE in the Strakhov Fracture Zone region (4°N) are presented. The trough of the fracture is interpreted as an open extension joint, a graben produced by stretching along the axis of the Mid-Atlantic Ridge. Bedrock studies showed that typical mid-ocean tholeiitic basalts occur within the narrow (60 nm wide) axial rift zone, whereas igneous rocks not typical for the ocean were found on the eastern and western flank plateaus. This allows to suppose that a reworked relict continental-type basement of pre-Upper Jurassic age possibly exists beneath the flank plateaus, within the segment under discussion. The above data correspond to the hypothesis of E. Bonatti about nonspreading nature of the basement of Mid-Atlantic Ridge within the equatorial segment and the Strakhov Fracture Zone.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 4.104792 * Median Longitude: -32.634826 * South-bound Latitude: 2.250000 * West-bound Longitude: -34.200000 * North-bound Latitude: 4.900000 * East-bound Longitude: -29.200000
Event(s):
S-43 * Latitude: 2.250000 * Longitude: -30.416667 * Elevation Start: -2100.0 m * Elevation End: -2900.0 m * Location: Mid-Atlantic Ridge * Method/Device: Dredge (DRG)
S-63 * Latitude: 3.933333 * Longitude: -32.516667 * Elevation: -2100.0 m * Location: Mid-Atlantic Ridge * Method/Device: Dredge (DRG)
S-66 * Latitude: 4.116667 * Longitude: -32.783333 * Elevation: -1500.0 m * Location: Mid-Atlantic Ridge * Method/Device: Dredge (DRG)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

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Datasets listed in this publication series

  1. Udintsev, GB; Beresnev, AF; Golod, VM et al. (1996): (Table 1) Basement rocks in the Strakhov Fracture Zone. https://doi.org/10.1594/PANGAEA.759778
  2. Udintsev, GB; Beresnev, AF; Golod, VM et al. (1996): (Table 2) Chemical composition of basement rocks from the Strakhov Fracture Zone. https://doi.org/10.1594/PANGAEA.759780
  3. Udintsev, GB; Beresnev, AF; Golod, VM et al. (1996): (Table 3) Chemical composition of clinopyroxene grains from gabbroids recovered in the Strakhov Fracture Zone. https://doi.org/10.1594/PANGAEA.759781