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Georgy Cherkashov

All Russian Research Institute of Geology and Mineral Resources of the World Ocean

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Cindy De Jonge

ETH Zurich

Jaap S. Sinninghe Damsté

Utrecht University

Alina Stadnitskaia

European Council for Maritime Applied R&D Association

T. V. Stepanova

All Russian Research Institute of Geology and Mineral Resources of the World Ocean

Ellen C. Hopmans

Royal Netherlands Institute for Sea Research

Andrey Fedotov

Institute for System Programming

V. Yu. Kuznetsov

St Petersburg University

Anna Firstova

All Russian Research Institute of Geology and Mineral Resources of the World Ocean

V. E. Bel’tenev

All Russian Research Institute of Geology and Mineral Resources of the World Ocean

Irina Streletskaya

Lomonosov Moscow State University

Cooperative Institutions

All Russian Research Institute of Geology and Mineral Resources of the World Ocean

Russian Academy of Sciences

St Petersburg University

Ifremer

Centre National de la Recherche Scientifique

Lomonosov Moscow State University

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

GEOMAR Helmholtz Centre for Ocean Research Kiel

United States Geological Survey

Université de Bretagne Occidentale

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Seismic facies as a key to insight into the distribution and characteristics of the offshore permafrost (new data from the Laptev Sea)

P. Rekant Е. А. Гусев Tilmann Schwenk Heidemarie Kassens V. Spieß

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Marine Geophysical Research (2001)

Kathleen Crane Hany Doss Peter Vogt Eirik Sundvor Georgy Cherkashov

Transform fault

Seafloor Spreading

Transtension

Echelon formation

Rift valley

Rift zone

10.1023/a:1012288309435

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Citations (77)

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)

Corrigendum to “In situ produced branched glycerol dialkyl glycerol tetraethers in suspended particulate matter from the Yenisei River, Eastern Siberia” [Geochim. Cosmochim. Acta 125 (2014) 476–491]

Geochimica et Cosmochimica Acta (2015)

Cindy De Jonge Alina Stadnitskaia Ellen C. Hopmans Georgy Cherkashov Andrey Fedotov

Particulate organic matter

10.1016/j.gca.2014.12.001

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Citations (0)

Offshore permafrost decay and massive seabed methane escape in water depths >20 m at the South Kara Sea shelf

Alexey Portnov J. Mienert Georgy Cherkashov

Seabed

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Citations (3)

Rare elements in SMS: mineralogical control and geochemical associations

Anna Firstova Georgy Cherkashov Alexander F. Goncharov T.V. Stepanova Sven Petersen

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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)

Continental shelf drilling in the Laptev Sea

Heidemarie Kassens Henning A. Bauch Georgy Cherkashov Jens A. Hoelemann Martin Melles

Continental Margin

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Composition and Formation of Gabbro-Peridotite Hosted Seafloor Massive Sulfide Deposits from the Ashadze-1 Hydrothermal Field, Mid-Atlantic Ridge

Minerals (2016)

Anna Firstova T. V. Stepanova Georgy Cherkashov Alexey Goncharov Svetlana Babaeva

This paper presents mineralogical and geochemical data on seafloor massive sulfides (SMS) from the Ashadze-1 hydrothermal field at the Mid-Atlantic Ridge (MAR). The Ashadze-1 deposit is associated with the uplifted lower crust and upper mantle (oceanic core complex, OCC) of the MAR segment characterized by asymmetric mode of accretion. The OCC is represented by deep-seated gabbro-peridotite rocks exhumed on the rift valley slope along the detachment fault, during seafloor spreading. Hydrothermal processes in OCC environments result in different deposit composition and morphology compared to basalt-hosted systems. Abundant chimneys and enrichment in particular metals, including copper, zinc, gold, cobalt and tin are typical for this type of SMS deposit. The Ashadze-1 deposit is considered an example of a hydrothermal system in the initial stage of evolution marked by the young age of the sulfides (<7.2 kyr). The mineralogy of Ashadze-1 reflects primary ore-forming processes unaffected by post formation alteration. We propose a model for the primary ore-forming hydrothermal process in an ultramafic-hosted environment on the modern seafloor.

Peridotite

Mid-Atlantic Ridge

Seafloor Spreading

10.3390/min6010019

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Citations (24)

The Arctic Coastal Dynamics Database: A New Classification Scheme and Statistics on Arctic Permafrost Coastlines

Estuaries and Coasts (2011)

Hugues Lantuit Pier Paul Overduin N. Couture Sebastian Wetterich F. E. Aré

Arctic dipole anomaly

Arctic geoengineering

Coastal erosion

10.1007/s12237-010-9362-6

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Citations (401)

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