A New Occurrence of Maruyamaite
| Autor: | Andrey V. Korsakov, F. A. Letnikov, Kira A. Musiyachenko |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
geography
Mineral geography.geographical_feature_category Tourmaline Metamorphic rock Muscovite Geochemistry Massif engineering.material Kyanite visual_art Earth and Planetary Sciences (miscellaneous) engineering visual_art.visual_art_medium General Earth and Planetary Sciences Quartz Biotite Geology |
| Zdroj: | Doklady Earth Sciences. 498:403-408 |
| ISSN: | 1531-8354 1028-334X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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