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Sedimentary infill in the equatorial Mid-Oceanic Canyon, Atlantic Ocean

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Abstract

Facts confirming the hypothesis of contourite sediment infill of the Equatorial Mid-Ocean Canyon (EMOC) are presented. We examined two cores recovered in Cruises 37 and 43 of the R/V Akademik Ioffe (2012, 2013). The cores recovered upper Quaternary miopelagic clays on the EMOC floor (AI-3149) and the adjacent abyssal plain (AI-2620). The study of these cores unraveled significant differences in their composition. In contrast to the lithologically homogeneous Core AI-2620, Core AI-3149 includes interlayers enriched in the biogenic CaCO3, terrigenous silt, and authigenic ferromanganese micronodules. These peculiarities are attributed to activity of the Antarctic Bottom Water (AABW) contour currents along the EMOC.

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Authors and Affiliations

  1. Shirshov Institute of Oceanology, Russian Academy of Sciences, Nakhimovskii pr. 36, Moscow, 117997, Russia

    N. V. Simagin, I. O. Murdmaa, E. A. Seitkalieva, D. G. Borisov & O. V. Levchenko

  2. Faculty of Geology, Moscow State University, Leninskie gory 1, Moscow, 119991, Russia

    N. V. Simagin

  3. Atlantic Branch, Shirshov Institute of Oceanology, Russian Academy of Sciences, pr. Mira 1/3, Kaliningrad, 236022, Russia

    E. V. Dorokhova & E. M. Emel’yanov

  4. Baltic State University, ul. Nevskogo 14, Kaliningrad, 236016, Russia

    E. V. Dorokhova

Authors
  1. N. V. Simagin
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  2. I. O. Murdmaa
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  3. E. A. Seitkalieva
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  4. D. G. Borisov
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  5. E. V. Dorokhova
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  6. E. M. Emel’yanov
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  7. O. V. Levchenko
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Correspondence to N. V. Simagin.

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Original Russian Text © N.V. Simagin, I.O. Murdmaa, E.A. Seitkalieva, D.G. Borisov, E.V. Dorokhova, E.M. Emel’yanov, O.V. Levchenko, 2017, published in Litologiya i Poleznye Iskopaemye, 2017, No. 6, pp. 483–490.

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Simagin, N.V., Murdmaa, I.O., Seitkalieva, E.A. et al. Sedimentary infill in the equatorial Mid-Oceanic Canyon, Atlantic Ocean. Lithol Miner Resour 52, 427–434 (2017). https://doi.org/10.1134/S0024490217060104

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  • DOI: https://doi.org/10.1134/S0024490217060104

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