Introduction
Periodicals
Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze
2009/17/1
Výskyt wollastonitu ve skarnu ve Vlastějovicích, střední Čechy (Česká republika)
Výskyt wollastonitu ve skarnu ve Vlastějovicích, střední Čechy (Česká republika)
Tomáš Kadlec, Stanislav Houzar, Jiří Sejkora
| Pages | 37-40 |
|---|---|
| Citation | KADLEC, Tomáš, HOUZAR, Stanislav a SEJKORA, Jiří. Výskyt wollastonitu ve skarnu ve Vlastějovicích, střední Čechy (Česká republika). Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze. Prague: National Museum, 2009, 17(1), 37-40. ISSN 1211-0329 (print), 1804-6495 (online). Also available from: https://publikace.nm.cz/en/periodicals/bmpholnrhmvp/17-1/vyskyt-wollastonitu-ve-skarnu-ve-vlastejovicich-stredni-cechy-ceska-republika |
Wollastonite as a rare mineral in iron skarn in Vlastějovice (central Bohemia, Czech Republic), has been discovered for the first time. Unzonal garnet-wollastonite aggregates occur between coarse-grained monomineral calcite rocks and quartz-rich pegmatite vein, which penetrate of pyroxene-epidote-garnet Fe-skarn metamorphosed under high amphibolite facie conditions. The needles of wollastonite are ≤ 100 µm long and form silky white nests up to 1 dm3 in size. Intergrowns of quartz, garnet (Adr62Grs22Alm12Sps4), calcite, fluorite and apophyllite (?) with wollastonite are typical. Wollastonite formed probably by influx of SiO2-, H2O-rich fluids from silicate rocks (pegmatite?) into the hydrothermal calcite vein during regional metamorphism. However, direct contact metamorphic origin at pegmatite contact is also possible.
Rozumím