Lithium and trace-element concentrations in trioctahedral micas from granites of different geochemical types measured via laser ablation ICP-MS

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F17%3A00476328" target="_blank" >RIV/67985831:_____/17:00476328 - isvavai.cz</a>

Alternative codes found

RIV/00216224:14310/17:00094631

Result on the web

<a href="http://dx.doi.org/10.1180/minmag.2016.080.137" target="_blank" >http://dx.doi.org/10.1180/minmag.2016.080.137</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1180/minmag.2016.080.137" target="_blank" >10.1180/minmag.2016.080.137</a>

Result language

angličtina

Original language name

Lithium and trace-element concentrations in trioctahedral micas from granites of different geochemical types measured via laser ablation ICP-MS

Original language description

The compositions of trioctahedral micas from 51 samples of granitoids with different geochemical affiliations and grades of differentiation from the Bohemian Massif, Central Europe, were analysed using electron microprobe (major elements) and laser ablation inductively coupled plasma mass spectrometry (Li, Sc, Ga, Ge, Nb, In, Sn, Cs, Ta,W, Tl). The micas form a continuous evolutionary series from phlogopite to zinnwaldite. The phlogopites and biotites from the I-type rocks are characterized by 5.5–5.7 Si, 2.4–2.6 Al, less than 0.1 Li atoms per formula unit [apfu] and Mg/(Mg + Fe) = 0.4–0.8. The biotites from the S-type granites usually contain 5.3–5.7 Si, 3.2–3.6 Al, 0.1–0.3 Li apfu and Mg/(Mg + Fe) = 0.15–0.4. The annites and zinnwaldites from the rare-metal granites contain 5.7–6.8 Si, 3.2–3.8 Al, 0.6–2.6 Li apfu and Mg/(Mg + Fe) less than 0.1. The concentrations of F, Rb, Cs and Tl increase from the phlogopites and biotites to zinnwaldites: F 0.1–8 wt.%, Rb2O 0.05–1.7 wt.%, Tl 2–50 ppm and Cs 40–2000 ppm. The concentrations of Sn, Nb, Ta and W in phlogopites and biotites from the I- and S-type granitoids generally correlate with those of the parent rocks and reach values of 20–100 ppm Sn, 20–250 ppm Nb, 1–20 ppm Ta and less than 5 ppm W. The highest concentrations were found in the Li-annites in the relatively early facies of rare-metal granites : 250–600 ppm Sn, 400–600 ppm Nb, 60–120 ppm Ta and 50–120 ppm W. The zinnwaldites in the late rare-metal granites facies are impoverished in these elements, which is explained by contemporaneous crystallization of cassiterite and columbite.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10504 - Mineralogy

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

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

Name of the periodical

Mineralogical Magazine

ISSN

0026-461X

e-ISSN

—

Volume of the periodical

81

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

19

Pages from-to

15-33

UT code for WoS article

000396518700002

EID of the result in the Scopus database

2-s2.0-85014525129