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@article{1411862,
author = {Novák, Milan and Jaroslav, Cícha and Čopjaková, Renata and Škoda, Radek and Vašinová Galiová, Michaela},
article_location = {STUTTGART},
article_number = {4},
doi = {http://dx.doi.org/10.1127/ejm/2017/0029-2652},
keywords = {milarite; agakhanovite-(Y); EPMA; LA–ICP-MS; CL; compositional trends; beryllium; NYF pegmatite},
language = {eng},
issn = {0935-1221},
journal = {European Journal of Mineralogy},
title = {Milarite-group minerals from the NYF pegmatite Velká skála, Písek district, Czech Republic: sole carriers of Be from the magmatic to hydrothermal stage},
url = {https://www.schweizerbart.de/papers/ejm/detail/29/88113/Milarite_group_minerals_from_the_NYF_pegmatite_Velka_skala_Pisek_district_Czech_Republic_sole_carriers_of_Be_from_the_magmatic_to_hydrothermal_stage},
volume = {29},
year = {2017}
}
TY - JOUR
ID - 1411862
AU - Novák, Milan - Jaroslav, Cícha - Čopjaková, Renata - Škoda, Radek - Vašinová Galiová, Michaela
PY - 2017
TI - Milarite-group minerals from the NYF pegmatite Velká skála, Písek district, Czech Republic: sole carriers of Be from the magmatic to hydrothermal stage
JF - European Journal of Mineralogy
VL - 29
IS - 4
SP - 755-766
EP - 755-766
PB - E SCHWEIZERBARTSCHE VERLAGSBUCHHANDLUNG, SCIENCE PUBLISHERS
SN - 09351221
KW - milarite
KW - agakhanovite-(Y)
KW - EPMA
KW - LA–ICP-MS
KW - CL
KW - compositional trends
KW - beryllium
KW - NYF pegmatite
UR - https://www.schweizerbart.de/papers/ejm/detail/29/88113/Milarite_group_minerals_from_the_NYF_pegmatite_Velka_skala_Pisek_district_Czech_Republic_sole_carriers_of_Be_from_the_magmatic_to_hydrothermal_stage
N2 - Four distinct paragenetic, morphological and compositional types of milarite-group minerals were distinguished in the NYF pegmatite Velka skala, Pisek district, Czech Republic (Moldanubian Zone). The simply zoned (Kfs, Plg, Ab, Qz> Bt> Ap> Tur) pegmatite dike, similar to 60 cm thick, is enclosed in durbachite (K, Mg-rich melasyenite). The milarite-group minerals include: yellowish, subhedral, prismatic grains of homogeneous milarite I (milarite s. s.); prismatic subparallel aggregates of white to grayish milarite II (zoned milarite s. s. to Sc-rich milarite, up to similar to 20 mol% of the oftedalite component) from small pockets; colorless hexagonal prismatic crystals of milarite III (milarite s. s.) lining open fractures and microscopic fillings in recrystallized K-feldspar locally associated with REE-bearing minerals (allanite, aeschynite, titanite); very rare milarite IV (milarite s. s. to agakhanovite) as prismatic crystals and thin overgrowths with complex oscillatory zoning, <= 200mm in size, on crystals of milarite II and milarite III. Their mineral assemblages, textures and compositions suggest primary (magmatic) for milarite I and hydrothermal origin for milarite II, III, and IV. The simplified compositional evolution in these milarites is: Al+Ca -> Be+Sc -> Be+Y, HREE -> Be+LREE. Milaritegroup minerals are the sole carriers of Be in the pegmatite, no relics or pseudomorphs after other Be-rich minerals were found; thus milarite is now established as an additional primary Be-rich mineral in granitic pegmatites. Mineral assemblages, chemical composition of minerals and close relation to the host durbachite suggest an NYF affinity of the Velka skala pegmatite as well as a close relation to euxenite-type pegmatites of the Trebic Pluton. Milarite-group minerals from Velka Skala exhibit very similar compositional evolution to those found in the Heftetjern pegmatite, Tordal, Norway.
ER -
NOVÁK, Milan, Cícha JAROSLAV, Renata ČOPJAKOVÁ, Radek ŠKODA a Michaela VAŠINOVÁ GALIOVÁ. Milarite-group minerals from the NYF pegmatite Velká skála, Písek district, Czech Republic: sole carriers of Be from the magmatic to hydrothermal stage. \textit{European Journal of Mineralogy}. STUTTGART: E SCHWEIZERBARTSCHE VERLAGSBUCHHANDLUNG, SCIENCE PUBLISHERS, 2017, roč.~29, č.~4, s.~755-766. ISSN~0935-1221. Dostupné z: https://dx.doi.org/10.1127/ejm/2017/0029-2652.
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