High-Temperature Beryl from Vugless Granite Pegmatites of the Suprunovskoye Deposit, Irkutsk Oblast, Russia


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Resumo

New data were obtained on the chemical composition of beryl from the Suprunovskoye deposit (wt %): 66.10 SiO2, 0.51 Na2O, 17.99 Al2O3, 0.37 MgO, 0.03 K2O, 0.02 CaO, 0.58 FeO, and 13.70 BeO (calculated). Fluid and melt inclusions were investigated for the first time in this mineral. It was found that the beryl was formed during late stages of granite magmatism from a specific pegmatite silicate melt or a water–silicate liquid enriched in water (>7 wt %), heavy REE (La/Yb = 0.48), and lithium, and depleted in fluorine and boron at a temperature of ~700°C and a pressure of ~6 kbar.

Sobre autores

E. Gerasimova

Vernadsky State Geological Museum, Russian Academy of Sciences; Fersman Mineralogical Museum, Russian Academy of Sciences

Autor responsável pela correspondência
Email: ekgera@gmail.com
Rússia, Moscow, 125009; Moscow, 119071

V. Prokof’iev

Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry,
Russian Academy of Sciences

Autor responsável pela correspondência
Email: vpr2004@rambler.ru
Rússia, Moscow, 119017

S. Smirnov

Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences

Autor responsável pela correspondência
Email: ssmr@igm.nsc.ru
Rússia, Novosibirsk, 630090

T. Kovalskaya

Institute of Experimental Mineralogy, Russian Academy of Sciences

Autor responsável pela correspondência
Email: tatiana76@iem.ac.ru
Rússia, Chernogolovka, Moscow oblast, 142432

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