V. E. Bel’tenev

An overview of Russian studies of deep-sea polymetallic sulfides (PМS) in the axial zone of the Mid-Atlantic Ridge (MAR) at the Russian Exploration Area (REA‒PMS) is presented. A brief geological description of the axial zone of the MAR and PMS sites discovered and studied for almost forty years before and after the signing of an exploration contract with the International Seabed Authority in 2012 is given. Information on methods for conducting searches and exploration of PMS, technical equipment, as well as on metallurgical processing of raw materials is presented.

10.29006/1564-2291.jor-2023.51(4).7

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Citations (0)

Seafloor massive sulfides from mid-ocean ridges: Exploring the causes of their geochemical variability with multivariate analysis

Earth-Science Reviews (2019)

Luca Toffolo Paolo Nimis G A Tret'yakov Irina Yu. Melekestseva V. E. Bel’tenev

Seafloor Spreading

Deposition

Compositional data

10.1016/j.earscirev.2019.102958

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Citations (33)

Sulfide geochronology along the Northern Equatorial Mid-Atlantic Ridge

Ore Geology Reviews (2016)

Georgy Cherkashov V. Yu. Kuznetsov К. А. Kuksa E. V. Tabuns Ф. Е. Максимов

Geochronology

Mid-Atlantic Ridge

10.1016/j.oregeorev.2016.10.015

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Citations (44)

Mass-wasting processes input in proximal metalliferous sediments: A case study of the Pobeda hydrothermal fields

Marine Geology (2021)

К. А. Kuksa A. S. Bich Georgy Cherkashov Anna Firstova V. Yu. Kuznetsov

Mid-Atlantic Ridge

Panache

10.1016/j.margeo.2021.106517

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Citations (9)

Barite-rich massive sulfides from the Semenov-1 hydrothermal field (Mid-Atlantic Ridge, 13°30.87′ N): Evidence for phase separation and magmatic input

Marine Geology (2014)

Irina Yu. Melekestseva G A Tret'yakov Paolo Nimis Anatoly M. Yuminov В. В. Масленников

Marcasite

10.1016/j.margeo.2013.12.013

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Citations (65)

Sulfide Breccias from the Semenov-3 Hydrothermal Field, Mid-Atlantic Ridge: Authigenic Mineral Formation and Trace Element Pattern

Minerals (2018)

Irina Yu. Melekestseva В. В. Масленников N. P. Safina Paolo Nimis S. O. Maslennikova

The aim of this paper is the investigation of the role of diagenesis in the transformation of clastic sulfide sediments such as sulfide breccias from the Semenov-3 hydrothermal field (Mid-Atlantic Ridge). The breccias are composed of marcasite–pyrite clasts enclosed in a barite–sulfide–quartz matrix. Primary hydrothermal sulfides occur as colloform, fine-crystalline, porous and radial marcasite–pyrite clasts with inclusions or individual clasts of chalcopyrite, sphalerite, pyrrhotite, bornite, barite and rock-forming minerals. Diagenetic processes are responsible for the formation of more diverse authigenic mineralization including framboidal, ovoidal and nodular pyrite, coarse-crystalline pyrite and marcasite, anhedral and reniform chalcopyrite, inclusions of HgS phase and pyrrhotite–sphalerite–chalcopyrite aggregates in coarse-crystalline pyrite, zoned bornite–chalcopyrite grains, specular and globular hematite, tabular barite and quartz. The early diagenetic ovoid pyrite is enriched in most trace elements in contrast to late diagenetic varieties. Authigenic lower-temperature chalcopyrite is depleted in trace elements relative to high-temperature hydrothermal ones. Trace elements have different modes of occurrence: Se is hosted in pyrite and chalcopyrite; Tl is related to sphalerite and galena nanoinclusions; Au is associated with galena; As in pyrite is lattice-bound, whereas in chalcopyrite it is related to tetrahedrite–tennantite nanoinclusions; Cd in pyrite is hosted in sphalerite inclusions; Cd in chalcopyrite forms its own mineral; Co and Ni are hosted in chalcopyrite.

Marcasite

Authigenic

Bornite

Chalcocite

Anhydrite

10.3390/min8080321

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Citations (18)

Peridotite-gabbro-trondhjemite association of the Mid-Atlantic Ridge between 12°58′ and 14°45′N: Ashadze and Logachev hydrothermal vent fields

Geochemistry International (2011)

S. A. Silantyev E. A. Krasnova Mathilde Cannat Н. С. Бортников Н. Н. Кононкова

Peridotite