Chemical compositions of zircon from rare-metal granites of different geochemical affiliations – a review

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F25%3A00639649" target="_blank" >RIV/67985831:_____/25:00639649 - isvavai.cz</a>

Výsledek na webu

<a href="https://geologicacarpathica.com/browse/archive/?journal_article_no=40282" target="_blank" >https://geologicacarpathica.com/browse/archive/?journal_article_no=40282</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.31577/GeolCarp.2025.15" target="_blank" >10.31577/GeolCarp.2025.15</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Chemical compositions of zircon from rare-metal granites of different geochemical affiliations – a review

Popis výsledku v původním jazyce

About 2000 microprobe analyses of zircon were evaluated in order to characterize typical compositions of zircon from common and rare-metal granites of different geotectonic/geochemical affiliations. Generally, zircon is chemically variable at all scales of research. This detailed study shows that the contents of minor elements vary more widely than usually expected from individual analyses. While the Zr/Hf ratio is a reliable indicator of the degree of fractionation of the parent magma, all proposed indicators of the geotectonic position of the source magma, like Y contents or Y/Yb and U/Th values, were found to be merely indicative. Zircon from peraluminous (S-type) granites crystallizes early, is often enriched in P, Al, U, W, Nb and Bi, its (Y+REE)/P values are usually <<1, and the Zr/Hf values mostly evolved from 100 to 10. Zircon in A-type granites is often a relatively late mineral, mostly enriched in HREE and Th, having low Y/Yb and high (Y+REE)/P values, and its Zr/Hf values evolved from 100 to 5. Zircon in peralkaline rocks either crystallizes primarily or results from the transformation of older zirconosilicates. In both cases, it is rich in Y, poor in U and Th, displays high (Y+REE) / P values and Zr/Hf values >50. The effect of the geotectonic environment of crystallization is particularly evident in late, more evolved rocks, while zircons from the early and less fractionated rocks of all geochemical types are similar.

Název v anglickém jazyce

Chemical compositions of zircon from rare-metal granites of different geochemical affiliations – a review

Popis výsledku anglicky

About 2000 microprobe analyses of zircon were evaluated in order to characterize typical compositions of zircon from common and rare-metal granites of different geotectonic/geochemical affiliations. Generally, zircon is chemically variable at all scales of research. This detailed study shows that the contents of minor elements vary more widely than usually expected from individual analyses. While the Zr/Hf ratio is a reliable indicator of the degree of fractionation of the parent magma, all proposed indicators of the geotectonic position of the source magma, like Y contents or Y/Yb and U/Th values, were found to be merely indicative. Zircon from peraluminous (S-type) granites crystallizes early, is often enriched in P, Al, U, W, Nb and Bi, its (Y+REE)/P values are usually <<1, and the Zr/Hf values mostly evolved from 100 to 10. Zircon in A-type granites is often a relatively late mineral, mostly enriched in HREE and Th, having low Y/Yb and high (Y+REE)/P values, and its Zr/Hf values evolved from 100 to 5. Zircon in peralkaline rocks either crystallizes primarily or results from the transformation of older zirconosilicates. In both cases, it is rich in Y, poor in U and Th, displays high (Y+REE) / P values and Zr/Hf values >50. The effect of the geotectonic environment of crystallization is particularly evident in late, more evolved rocks, while zircons from the early and less fractionated rocks of all geochemical types are similar.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10504 - Mineralogy

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Geologica Carpathica

ISSN

1335-0552

e-ISSN

1336-8052

Svazek periodika

76

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

17

Strana od-do

227-243

Kód UT WoS článku

001614644700001

EID výsledku v databázi Scopus

2-s2.0-105026780276