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Particle Fluxes in Hydrothermal Vent Fields of the Southern Part of the Mohns Ridge

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Abstract

The first results of studies of vertical particle fluxes in a hydrothermal sedimentary system of a subpolar area of the Mid-Atlantic Ridge under the influence of hydrodynamic factors that affect the distribution of hydrothermal plumes are discussed. Sediment traps were deployed in the Trollveggen and Soria Moria hydrothermal vent fields in the southern part of the Mohns Ridge for a short period during the 75th cruise of the R/V Akademik Mstislav Keldysh in June 2019. The particles were deposited in the bottom layer under a dominant northeastern water transfer, which coincides with the spatial orientation of the rift valley in the area studied. Numerous short-period positive temperature anomalies of up to 0.86°C were registered. The particle fluxes in the bottom layer of this area are much lower than in the hydrothermal vent fields of the southernmost areas of the Mid-Atlantic Ridge. A significant amount of hydrothermal minerals (barite, sulfides, etc.) were detected in trap matter of the bottom layers. The main difference between the hydrothermal vent fields is the absence of gypsum crystals and the lower content of fibrous aggregates (filaments and spheres) of amorphous silica in the Soria Moria field.

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ACKNOWLEDGMENTS

The authors are grateful to the crew of R/V Akademik Mstislav Keldysh, G.V. Malafeev, A.V. Bulokhov, and A.I.  Kochenkova for help in sampling and treatment of samples and to Prof. A.Yu. Lein for help in a problem statement and discussion of the results.

Funding

The analytical studies were supported by the Russian Science Foundation, project no. 20-17-00157. The work of ADOS was supported by the Russian Foundation for Basic Research, project no. 19-05-00787. The interpretation of results was supported in part by a state contract of the Ministry of Science and Higher Education of the Russian Federation, project no. 0149-2019-0007.

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Authors and Affiliations

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

    A. A. Klyuvitkin, M. D. Kravchishina & A. G. Boev

Authors
  1. A. A. Klyuvitkin
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  2. M. D. Kravchishina
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  3. A. G. Boev
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Correspondence to A. A. Klyuvitkin.

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Translated by I. Melekestseva

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Klyuvitkin, A.A., Kravchishina, M.D. & Boev, A.G. Particle Fluxes in Hydrothermal Vent Fields of the Southern Part of the Mohns Ridge. Dokl. Earth Sc. 497, 200–205 (2021). https://doi.org/10.1134/S1028334X21030053

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  • DOI: https://doi.org/10.1134/S1028334X21030053

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