EVOLUTION OF THE CINOVEC (ZINNWALD) GRANITE CUPOLA, CZECH REPUBLIC: COMPOSITION OF FELDSPARS AND MICAS, A CLUE TO THE ORIGIN OF W, Sn MINERALIZATION

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F12%3A10133917" target="_blank" >RIV/00216208:11310/12:10133917 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.3749/canmin.50.4.1131" target="_blank" >http://dx.doi.org/10.3749/canmin.50.4.1131</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3749/canmin.50.4.1131" target="_blank" >10.3749/canmin.50.4.1131</a>

Result language

angličtina

Original language name

EVOLUTION OF THE CINOVEC (ZINNWALD) GRANITE CUPOLA, CZECH REPUBLIC: COMPOSITION OF FELDSPARS AND MICAS, A CLUE TO THE ORIGIN OF W, Sn MINERALIZATION

Original language 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 ("protolithionite") 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 asystematic 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

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DB - Geology and mineralogy

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2012

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Canadian Mineralogist

ISSN

0008-4476

e-ISSN

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Volume of the periodical

50

Issue of the periodical within the volume

4

Country of publishing house

CA - CANADA

Number of pages

18

Pages from-to

1131-1148

UT code for WoS article

000314174400021

EID of the result in the Scopus database

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