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Volume 13
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10.3390/min13091117
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Article

Fluid Inclusion Studies of Barite Disseminated in Hydrothermal Sediments of the Mohns Ridge

by
Marina D. Kravchishina
1,*,
Vsevolod Yu. Prokofiev
1,2,
Olga M. Dara
1,
Boris V. Baranov
1,
Alexey A. Klyuvitkin
1,
Karina S. Iakimova
1,3,
Vladislav Yu. Kalgin
1 and
Alla Yu. Lein
1
1
Shirshov Institute of Oceanology, Russian Academy of Sciences, 36 Nakhimovsky Prosp., Moscow 117997, Russia
2
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, 35 Staromonetny Per., Moscow 119017, Russia
3
Geological Faculty, Lomonosov Moscow State University, GSP-1, Leninskie Gory, Moscow 119991, Russia
*
Author to whom correspondence should be addressed.
Minerals 2023, 13(9), 1117; https://doi.org/10.3390/min13091117
Submission received: 5 July 2023 / Revised: 18 August 2023 / Accepted: 21 August 2023 / Published: 24 August 2023
(This article belongs to the Special Issue Sulphate and Carbonate Minerals)
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Abstract

This article discusses the results of a fluid inclusion studies in barite collected at the Jan Mayen vent field area (Troll Wall and Perle and Bruse) and Loki’s Castle vent field on the Mohns Ridge segment of the Arctic Mid-Ocean Ridge. Three mafic-hosted volcanogenic massive sulfide deposits were examined within the active vent fields that adequately correspond to the geological settings of ultraslow-spreading ridges and P–T conditions. Hydrothermal sediments were investigated to determine the temperature and salinity of the fluids responsible for barite precipitation. The hydrothermal origin of the barite was confirmed by its morphology. Fluid inclusions are two-phase and homogenize into the liquid phase on heating at temperatures below 287 °C. The salt concentration in fluids trapped in inclusions is 2.6–4.4 wt.% NaCl eq. The crystallization temperatures varied from 276 °C to 119 °C and from 307 °C to 223 °C for the Jan Mayen and Loki’s Castle vent fields, respectively. The data obtained allowed us to confirm evidence of fluid phase separation in the hydrothermal systems and to expand our knowledge of the temperature and salinity of mineral fluids previously known from recent direct measurements during the cruises within the G.O. Sars research vessel. The fluid inclusions data obtained from barites emphasize the fluid features characteristic of volcanogenic massive sulfide deposits, the similarities and differences among the studied hydrothermal sites and allow comparisons with similar products from other active hydrothermal systems.
Keywords: barite; fluid inclusion; hydrothermal vent field; hydrothermal fluid; mineralization; volcanogenic massive sulfide deposits; ultraslow-spreading ridge; Mohns Ridge; Arctic Mid-Ocean Ridge barite; fluid inclusion; hydrothermal vent field; hydrothermal fluid; mineralization; volcanogenic massive sulfide deposits; ultraslow-spreading ridge; Mohns Ridge; Arctic Mid-Ocean Ridge

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MDPI and ACS Style

Kravchishina, M.D.; Prokofiev, V.Y.; Dara, O.M.; Baranov, B.V.; Klyuvitkin, A.A.; Iakimova, K.S.; Kalgin, V.Y.; Lein, A.Y. Fluid Inclusion Studies of Barite Disseminated in Hydrothermal Sediments of the Mohns Ridge. Minerals 2023, 13, 1117. https://doi.org/10.3390/min13091117

AMA Style

Kravchishina MD, Prokofiev VY, Dara OM, Baranov BV, Klyuvitkin AA, Iakimova KS, Kalgin VY, Lein AY. Fluid Inclusion Studies of Barite Disseminated in Hydrothermal Sediments of the Mohns Ridge. Minerals. 2023; 13(9):1117. https://doi.org/10.3390/min13091117

Chicago/Turabian Style

Kravchishina, Marina D., Vsevolod Yu. Prokofiev, Olga M. Dara, Boris V. Baranov, Alexey A. Klyuvitkin, Karina S. Iakimova, Vladislav Yu. Kalgin, and Alla Yu. Lein. 2023. "Fluid Inclusion Studies of Barite Disseminated in Hydrothermal Sediments of the Mohns Ridge" Minerals 13, no. 9: 1117. https://doi.org/10.3390/min13091117

APA Style

Kravchishina, M. D., Prokofiev, V. Y., Dara, O. M., Baranov, B. V., Klyuvitkin, A. A., Iakimova, K. S., Kalgin, V. Y., & Lein, A. Y. (2023). Fluid Inclusion Studies of Barite Disseminated in Hydrothermal Sediments of the Mohns Ridge. Minerals, 13(9), 1117. https://doi.org/10.3390/min13091117

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