2016
VESUVIANITE – POTENTIAL INDICATOR MINERAL OF MINERALIZED SKARNS?
MALÝ, Jakub, Milan NOVÁK a Jan CEMPÍREKZákladní údaje
Originální název
VESUVIANITE – POTENTIAL INDICATOR MINERAL OF MINERALIZED SKARNS?
Název česky
VESUVIAN - POTENCÍALNÍ INDIKÁTOROVÝ MINERÁL MINERALIZOVANÝCH SKARNŮ?
Autoři
MALÝ, Jakub (203 Česká republika, domácí), Milan NOVÁK (203 Česká republika, garant, domácí) a Jan CEMPÍREK (203 Česká republika, domácí)
Vydání
New Minerals and Mineralogy in the 21st Century, International scientific symposium Jáchymov 2016, 2016
Další údaje
Jazyk
angličtina
Typ výsledku
Konferenční abstrakt
Obor
10500 1.5. Earth and related environmental sciences
Stát vydavatele
Česká republika
Utajení
není předmětem státního či obchodního tajemství
Kód RIV
RIV/00216224:14310/16:00088194
Organizační jednotka
Přírodovědecká fakulta
ISBN
978-80-7490-117-1
Klíčová slova česky
VESUVIAN; SKARN; LA-ICP-MS; EMPA; STOPOVÉ PRVKY; LITHIUM; BERYLLIUM; BÓR; ZINEK; CÍN; BISMUT; REE
Klíčová slova anglicky
VESUVIANITE; SKARN; LA-ICP-MS; EMPA; TRACE ELEMENTS; LITHIUM; BERYLLIUM; BORON; ZINC; TIN; BISMUTH; REE
Štítky
Příznaky
Mezinárodní význam
Změněno: 3. 10. 2016 16:07, Mgr. Jakub Malý
Anotace
V originále
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.
Návaznosti
| GA14-13347S, projekt VaV |
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