In Situ Geochemical Evaluation of Retrograde Hydration Effects in the Peri-Siberian Forearc Mantle (Khara-Nur and Alag-Khadny Peridotite Complexes)

In order to assess the geochemical effects of retrograde metamorphic rehydration, fluid metasomatism, and the fluid-mobile elements (FMEs) budget in the case of oceanic and continental subduction, we report the petrography, bulk, and in situ LA-ICP-MS trace-element data for the two poorly studied op...

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Bibliographic Details
Published in:Minerals (Basel) 2024-05, Vol.14 (5), p.457
Main Authors: Karimov, Anas A., Gornova, Marina A., Belyaev, Vasiliy A., Skuzovatov, Sergei Yu, Medvedev, Alexander Ya, Bryanskiy, Nikolay V.
Format: Article
Language:English
Subjects:
Accretion
Chlorite
Chrysotile
Composition
Continental margins
Enrichment
Evaluation
Fluids
Geochemistry
Geology
Hydration
Lithosphere
Melting
Metamorphism
Metamorphism (Geology)
Mineral assemblages
Minerals
Olivine
Ophiolites
Orogeny
Peridotite
Petrography
Petrology
Raman spectroscopy
Rehydration
Sediments
Serpentine
Serpentinite
Serpentinization
Subduction
Trace elements
Tremolite
Zirconium
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Summary:In order to assess the geochemical effects of retrograde metamorphic rehydration, fluid metasomatism, and the fluid-mobile elements (FMEs) budget in the case of oceanic and continental subduction, we report the petrography, bulk, and in situ LA-ICP-MS trace-element data for the two poorly studied ophiolites in the northern (Khara-Nur, Eastern Sayan, Russia) and central (Alag-Khadny accretionary wedge, SW Mongolia) parts of the peri-Siberian orogenic framing. Both complexes are relics of the ancient oceanic mantle, which was subjected to processes of partial melting, metasomatism, and retrograde metamorphism. Typical mineral assemblages include olivine + orthopyroxene + chlorite + tremolite ± secondary olivine (640–800 °C), olivine + antigorite ± secondary clinopyroxene (
ISSN:2075-163X
2075-163X
DOI:10.3390/min14050457