A New Occurrence of Maruyamaite

We report for the first time the occurrence of a maruyamaite (dravite with a high K content) + garnet + kyanite + biotite + muscovite + K-feldspar + quartz mineral assemblage in metamorphic rocks of the Barchi-Kol site (Kokchetav Massif). We estimate the conditions for the formation of mineral parag...

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Bibliographic Details
Published in:Doklady earth sciences 2021-05, Vol.498 (1), p.403-408
Main Authors: Musiyachenko, K. A., Korsakov, A. V., Letnikov, F. A.
Format: Article
Language:English
Subjects:
Analysis
Biotite
Earth and Environmental Science
Earth Sciences
Feldspars
Garnet
Isotopes
Kyanite
Lithium compounds
Massifs
Metamorphic rocks
Mica
Mineral assemblages
Mineralogy
Muscovite
New records
Rocks, Metamorphic
Tourmaline
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Summary:We report for the first time the occurrence of a maruyamaite (dravite with a high K content) + garnet + kyanite + biotite + muscovite + K-feldspar + quartz mineral assemblage in metamorphic rocks of the Barchi-Kol site (Kokchetav Massif). We estimate the conditions for the formation of mineral paragenesis with tourmaline based on petrological observations and thermodynamic calculations. The results were compared with the available data on the evolution of this metamorphic complex. As a result, we propose a new model for the formation of maruyamaite. Its presence in the rock is believed to indicate high K activity in the mineral-forming fluid.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X21050111