| KONÍČKOVÁ, Šárka, Zdeněk LOSOS, Vladimír HRAZDIL, Stanislav HOUZAR a Dalibor VŠIANSKÝ. Mineralogy of "eye-like" opals from Nová Ves near Oslavany (Moldanubian zone, Bohemian Massif). Online. In Joint 5th Central-European Mineralogical Conference and 7th Mineral Sciences in the Carpathians Conference. 2018, [citováno 2024-04-24] |
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@proceedings{1425496,
author = {Koníčková, Šárka and Losos, Zdeněk and Hrazdil, Vladimír and Houzar, Stanislav and Všianský, Dalibor},
booktitle = {Joint 5th Central-European Mineralogical Conference and 7th Mineral Sciences in the Carpathians Conference},
keywords = {eye-like concentric opal;quartz;mineralogy;weathering;serpentinite},
language = {eng},
title = {Mineralogy of "eye-like" opals from Nová Ves near Oslavany (Moldanubian zone, Bohemian Massif)},
year = {2018}
}
TY - CONF
ID - 1425496
AU - Koníčková, Šárka - Losos, Zdeněk - Hrazdil, Vladimír - Houzar, Stanislav - Všianský, Dalibor
PY - 2018
TI - Mineralogy of "eye-like" opals from Nová Ves near Oslavany (Moldanubian zone, Bohemian Massif)
KW - eye-like concentric opal;quartz;mineralogy;weathering;serpentinite
N2 - The locality Nová Ves near Oslavany, situated in Moldanubian zone of western Moravia, represents the only known occurrence of zonal "eye-like" (concentric) opals in Bohemian Massif. This specific type of opal is characterized by a concentric zonal texture with white core ("eye"), brown massive translucent inner rim and locally also white porous outer rim. These opals occur in residual sediments in a small area along the contact of serpentinized peridotite and granulite. White and grey "eye" and brown inner zone contains mainly opal-CT. Quartz and moganite are present in part in white aggregates of the "eye" only. White outer rim of opals is composed of calcite with disseminated opal relics and this zone is younger as core and inner rim (calcite replaces opal). X-ray powder diffraction analyses proved presence of sepiolite admixture in brown part and accessory amount of sepiolite and chlorite in white rim.
ER -
KONÍČKOVÁ, Šárka, Zdeněk LOSOS, Vladimír HRAZDIL, Stanislav HOUZAR a Dalibor VŠIANSKÝ. Mineralogy of ''eye-like'' opals from Nová Ves near Oslavany (Moldanubian zone, Bohemian Massif). Online. In \textit{Joint 5th Central-European Mineralogical Conference and 7th Mineral Sciences in the Carpathians Conference}. 2018, [citováno 2024-04-24]
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