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@article{1340748,
author = {Števko, Martin and Uher, Pavel and Sejkora, Jiří and Malíková, Radana and Škoda, Radek and Vaculovič, Tomáš},
article_location = {Praha},
article_number = {4},
doi = {http://dx.doi.org/10.3190/jgeosci.202},
keywords = {hydrothermal phosphates; triplite; arrojadite group; chemical composition; S-type granite; Slovak Republic},
language = {eng},
issn = {1802-6222},
journal = {Journal of Geosciences},
title = {Phosphate minerals from the hydrothermal quartz veins in specialized S-type granites, Gemerska Poloma (Western Carpathians, Slovakia)},
volume = {60},
year = {2015}
}
TY - JOUR
ID - 1340748
AU - Števko, Martin - Uher, Pavel - Sejkora, Jiří - Malíková, Radana - Škoda, Radek - Vaculovič, Tomáš
PY - 2015
TI - Phosphate minerals from the hydrothermal quartz veins in specialized S-type granites, Gemerska Poloma (Western Carpathians, Slovakia)
JF - Journal of Geosciences
VL - 60
IS - 4
SP - 237-249
EP - 237-249
PB - Česká geologická společnost
SN - 18026222
KW - hydrothermal phosphates
KW - triplite
KW - arrojadite group
KW - chemical composition
KW - S-type granite
KW - Slovak Republic
N2 - An interesting association of phosphate minerals (fluorapatite, triplite, arrojadite-group minerals and viitaniemiite) was studied from intra-granitic hydrothermal quartz veins with minor amounts of albite, orthoclase, muscovite, fluorite, rhodochrosite, arsenopyrite, pyrite, bismuthinite and kobellite. The veins occur in highly evolved, Permian topaz-zinnwaldite leucogranite at the Elisabeth adit near Gemerska Poloma, Gemeric Unit, Western Carpathians (eastern Slovakia). Fluorapatite is enriched in Mn (similar to 4 wt. % MnO, 0.3 apfu Mn) and frequently replaced by triplite, representing the first known triplite occurrence in Western Carpathians. This mineral forms irregular aggregates (<= 7 cm across), Mn/(Mn + Fe) atomic ratio of which attains 0.68 to 0.78 and F/(F + OH) = 0.89-0.92. "Fluorarrojadite-(BaNa)" to its Mn-dominant analogue "fluordickinsonite-(BaNa)" (both minerals still not approved by IMA-CNMNC) occurs as aggregates up to 2 cm across, showing Sr-rich (similar to 1.7 wt. % SrO, similar to 0.36 apfu Sr) and Sr-poor (<= 0.6 wt. % SrO, <= 0.13 apfu Sr) compositions with W site F/(F + OH) = 0.74-0.80 and M site Mn/(Mn + Fe) = 0.39-0.52. Rare viitaniemiite is Mn-rich (10 to 11 wt. % MnO, 0.34-0.38 apfu Mn). The phosphate mineralization in quartz represents a high-temperature hydrothermal assemblage. The F-rich Mn, Fe, Ca-bearing phosphates, fluorite, and muscovite precipitated most likely in presence of alkali-and fluorine-bearing post-magmatic fluids which altered primary magmatic minerals (especially Li-rich micas and alkali feldspars) and liberated some elements (Fe, Mn, Al, Ba, Sr, Na, K) from the adjacent granite.
ER -
ŠTEVKO, Martin, Pavel UHER, Jiří SEJKORA, Radana MALÍKOVÁ, Radek ŠKODA a Tomáš VACULOVIČ. Phosphate minerals from the hydrothermal quartz veins in specialized S-type granites, Gemerska Poloma (Western Carpathians, Slovakia). \textit{Journal of Geosciences}. Praha: Česká geologická společnost, 2015, roč.~60, č.~4, s.~237-249. ISSN~1802-6222. Dostupné z: https://dx.doi.org/10.3190/jgeosci.202.
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