Open AccessGrosulár a diopsid v kryštalických vápencoch z lokality Čučma - Čierna baňa (Slovenská republika)
Author(s) -
Peter Růžička,
Peter Bačík,
Pavol Myšľan,
Sergii Kurylo
Publication year - 2020
Publication title -
bulletin mineralogie petrologie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.239
H-Index - 10
eISSN - 2570-7345
pISSN - 2570-7337
DOI - 10.46861/bmp.28.094
Subject(s) - diopside , composition (language) , manganese , geology , mineralogy , analytical chemistry (journal) , crystallography , geochemistry , materials science , chemistry , metallurgy , art , environmental chemistry , literature
The identified mineral association in the crystalline limestones from the manganese locality Čučma - Čierna baňa consists of garnets and pyroxenes. Mineralogical composition of the samples Ču-1 and Ču-2 is represented by zonal garnets with Grs76.12-82.31; Adr17.69-23.88 composition in the core and Grs95.48-97.05; Adr2.95-4.52 composition in the rim. In the sample Ču-3 inverse zonality (the core Adr3.99, Grs96.01; the rim Adr20.55, Grs79.45) of garnet is observable. The analyzed pyroxenes have a diopside composition with a variable Mg/(Mg+Fe2+) ratio. A slightly increased content of Mn (up to 0.09 apfu) ascends into the johannsenite molecule.