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| Description
| - A 1596-m-deep borehole (CS-1) located in the central part of the Cinovec (Zinnwald) granite cupola mineralized in Sn and W intersected zinnwaldite granite (ZG) followed by lithian annite (%22protolithionite%22) granite (PG). These two types of granite are separated by a transition zone (TZ). We studied the chemical composition of major mineral phases (plagioclase, K-feldspar, micas) by EPMA and LA-ICP-MS analyses. The plagioclase composition corresponds to albite (Ab(99.6-91.1)) containing 0.09 to 0.18 wt.% Rb2O. Albite crystallized from the magma. K-feldspar is perthitic and shows an increase in Rb concentration (up to 0.83 wt.% Rb2O) in the apical part of the cupola. The partition coefficient K-D-Rb(Mi-Kfs) is constant throughout the cupola, indicating a systematic re-equilibration of these two minerals with fluid. Lithian annite occurs below -735 m. Its F content decreases with depth and from -940.5 m, OH exceeds F. Magnesium and Ti concentrations show a remarkable positive correlation with depth. The TZ and adjacent area are characterized by strong variations in the chemical composition of micas, reflecting the fluctuation of saturation-oversaturation of residual liquid by a F-rich fluid phase. The Rb concentration in zinnwaldite (up to 2 wt.% Rb2O) strongly increases in the apical part of the cupola owing to a significant transfer of volatiles. The chemical composition of mica evolves gradually from the TZ to the apical zone. The discovery of lithian annite included in quartz at -97 m indicates the formation of zinnwaldite by interaction of lithian annite with F-rich fluid. The octahedral site of lithian annite allows the incorporation of Sn, Nb, Ta and W, replacing Ti. Because of the lithian annite -> zinnwaldite transformation, these elements with higher ionic charges are expelled from the mica structure, transferred to the fluid phase and concentrated in the apical part of the cupola.
- A 1596-m-deep borehole (CS-1) located in the central part of the Cinovec (Zinnwald) granite cupola mineralized in Sn and W intersected zinnwaldite granite (ZG) followed by lithian annite (%22protolithionite%22) granite (PG). These two types of granite are separated by a transition zone (TZ). We studied the chemical composition of major mineral phases (plagioclase, K-feldspar, micas) by EPMA and LA-ICP-MS analyses. The plagioclase composition corresponds to albite (Ab(99.6-91.1)) containing 0.09 to 0.18 wt.% Rb2O. Albite crystallized from the magma. K-feldspar is perthitic and shows an increase in Rb concentration (up to 0.83 wt.% Rb2O) in the apical part of the cupola. The partition coefficient K-D-Rb(Mi-Kfs) is constant throughout the cupola, indicating a systematic re-equilibration of these two minerals with fluid. Lithian annite occurs below -735 m. Its F content decreases with depth and from -940.5 m, OH exceeds F. Magnesium and Ti concentrations show a remarkable positive correlation with depth. The TZ and adjacent area are characterized by strong variations in the chemical composition of micas, reflecting the fluctuation of saturation-oversaturation of residual liquid by a F-rich fluid phase. The Rb concentration in zinnwaldite (up to 2 wt.% Rb2O) strongly increases in the apical part of the cupola owing to a significant transfer of volatiles. The chemical composition of mica evolves gradually from the TZ to the apical zone. The discovery of lithian annite included in quartz at -97 m indicates the formation of zinnwaldite by interaction of lithian annite with F-rich fluid. The octahedral site of lithian annite allows the incorporation of Sn, Nb, Ta and W, replacing Ti. Because of the lithian annite -> zinnwaldite transformation, these elements with higher ionic charges are expelled from the mica structure, transferred to the fluid phase and concentrated in the apical part of the cupola. (en)
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| Title
| - EVOLUTION OF THE CINOVEC (ZINNWALD) GRANITE CUPOLA, CZECH REPUBLIC: COMPOSITION OF FELDSPARS AND MICAS, A CLUE TO THE ORIGIN OF W, Sn MINERALIZATION
- EVOLUTION OF THE CINOVEC (ZINNWALD) GRANITE CUPOLA, CZECH REPUBLIC: COMPOSITION OF FELDSPARS AND MICAS, A CLUE TO THE ORIGIN OF W, Sn MINERALIZATION (en)
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| skos:prefLabel
| - EVOLUTION OF THE CINOVEC (ZINNWALD) GRANITE CUPOLA, CZECH REPUBLIC: COMPOSITION OF FELDSPARS AND MICAS, A CLUE TO THE ORIGIN OF W, Sn MINERALIZATION
- EVOLUTION OF THE CINOVEC (ZINNWALD) GRANITE CUPOLA, CZECH REPUBLIC: COMPOSITION OF FELDSPARS AND MICAS, A CLUE TO THE ORIGIN OF W, Sn MINERALIZATION (en)
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| skos:notation
| - RIV/00216208:11310/12:10133917!RIV13-MSM-11310___
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| http://linked.open...avai/predkladatel
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/00216208:11310/12:10133917
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - Czech Republic; Cinovec (Zinnwald); metallogenic model; F-rich fluid; lithian annite -> zinnwaldite transformation; Sn, Nb, Ta and W concentrations in micas; lithian annite; zinnwaldite; granite cupola (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Strnad, Ladislav
- Johan, Vera
- Johan, Zdenek
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| http://linked.open...ain/vavai/riv/wos
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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| http://bibframe.org/vocab/doi
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| http://localhost/t...ganizacniJednotka
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| is http://linked.open...avai/riv/vysledek
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