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@proceedings{1355501,
author = {Malý, Jakub and Novák, Milan and Cempírek, Jan},
booktitle = {New Minerals and Mineralogy in the 21st Century, International scientific symposium Jáchymov 2016},
keywords = {VESUVIANITE; SKARN; LA-ICP-MS; EMPA; TRACE ELEMENTS; LITHIUM; BERYLLIUM; BORON; ZINC; TIN; BISMUTH; REE},
language = {eng},
isbn = {978-80-7490-117-1},
title = {VESUVIANITE – POTENTIAL INDICATOR MINERAL OF MINERALIZED SKARNS?},
url = {http://www.jachymov2016.cz/abstracts},
year = {2016}
}
TY - CONF
ID - 1355501
AU - Malý, Jakub - Novák, Milan - Cempírek, Jan
PY - 2016
TI - VESUVIANITE – POTENTIAL INDICATOR MINERAL OF MINERALIZED SKARNS?
SN - 9788074901171
KW - VESUVIANITE
KW - SKARN
KW - LA-ICP-MS
KW - EMPA
KW - TRACE ELEMENTS
KW - LITHIUM
KW - BERYLLIUM
KW - BORON
KW - ZINC
KW - TIN
KW - BISMUTH
KW - REE
UR - http://www.jachymov2016.cz/abstracts
L2 - http://www.jachymov2016.cz/abstracts
N2 - Vesuvianite is a typical mineral for contact metamorphic and metasomatic rocks – skarns, rodingites, skarnoids. Its composition depends on several factors – bulk composition of the intrusive rock and its metasedimentary host, composi-tion of reacting fluids, and PT-conditions. Vesuvianite structure is complex and accommodates a large number of various elements – its general formula is X19Y13Z18T0-5O68W10, where X = Ca, Na, Ln3+, Pb2+, Sb3+; Y = Al, Mg, Fe3+, Fe2+, Ti4+, Mn, Cu, Zn, As3+; Z = Si; T = B; and W = OH, F, Cl, O [1,2,3]. We studied chemical (major, minor and trace elements) com-position of vesuvianite from skarns at 5 selected localities from the Bohemian Massif. VESUVIANITE COMPOSITION The studied samples are compositionally heterogeneous with variable Fe/Mg ratio, Al/R2+ ratio, and variable contents of Ti, Na and F within each locality; core-to-rim zoning was locally observed (increase of Fe, Be, B, Zn, and Sn, decrease of Al, Mg, and F). Locality-specific change of compo-sition from primary to secondary vesuvianite generations is present; while a very distinct decrease in Fe/Mg is present at Žulová, the Nedvědice sam-ples show only a slight increase of Fe/Mg, decrease of Al/R2+ and increase of Ti/R2+ ratios (Fig. 2). IMPLICATIONS: Preliminary results on vesuvianite major and trace element compositions showed that vesuvianite has a potential to record compositional changes of reacting fluids, because a) its structure is versatile enough to include a wide range of ele-ments; including light elements (Li, Be, B), REE (Y and LREE), and especially metals and semi-metals (Zn, Bi, As, Sn, Sb), and b) recrystallizes during post-magmatic hydrothermal alteration, with modified composition in contents of both major and trace elements. Vesuvianite accommodates elevated amounts of Sn whereas its contents of W and Mo are very low; we suggest this is due to incompatibility of Mo6+ and W6+ with the vesuvianite structure.
ER -
MALÝ, Jakub, Milan NOVÁK a Jan CEMPÍREK. VESUVIANITE – POTENTIAL INDICATOR MINERAL OF MINERALIZED SKARNS? In \textit{New Minerals and Mineralogy in the 21st Century, International scientific symposium Jáchymov 2016}. 2016. ISBN~978-80-7490-117-1.
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