Geochronology and petrology of pyroxen?garnet skatns (eastern Bohemian Massif): implications for the source and evolution of the Variscan continental crust

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F14%3A00000310" target="_blank" >RIV/00025798:_____/14:00000310 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.jgeosci.org" target="_blank" >http://www.jgeosci.org</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.181" target="_blank" >10.3190/jgeosci.181</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Geochronology and petrology of pyroxen?garnet skatns (eastern Bohemian Massif): implications for the source and evolution of the Variscan continental crust

Popis výsledku v původním jazyce

Zircon ages (U?Pb, LA-ICPMS) obtained from skarns in the Kutná Hora and Svratka units and in the Moldanubian Zone (Bohemian Massif) show significant variations between the lithotectonic units as well as among samples from individual localities. The agesfall between 310 Ma and 3.1 Ga. We suggest that such large spread is a result of both different zircon clastic grain sources and subsequent metamorphic histories. The oldest Neoarchaean to Neoproterozoic ages are interpreted as detrital zircon grains from pre-Cadomian basement. Pronounced age maxima between 600 and 520 Ma (late Neoproterozoic to early Cambrian) were found in skarn samples from the Moldanubian Zone, Svratka and Kutná Hora units. We interpret these as maximum ages of skarn precursor deposition. Apparent Cambrian?Ordovician?Silurian to early Devonian zircon ages were obtained from non-mineralized samples of the Moldanubian Zone and also in the Kutná Hora Unit. This wide temporal interval could reflect maximum ages of skarn

Název v anglickém jazyce

Geochronology and petrology of pyroxen?garnet skatns (eastern Bohemian Massif): implications for the source and evolution of the Variscan continental crust

Popis výsledku anglicky

Zircon ages (U?Pb, LA-ICPMS) obtained from skarns in the Kutná Hora and Svratka units and in the Moldanubian Zone (Bohemian Massif) show significant variations between the lithotectonic units as well as among samples from individual localities. The agesfall between 310 Ma and 3.1 Ga. We suggest that such large spread is a result of both different zircon clastic grain sources and subsequent metamorphic histories. The oldest Neoarchaean to Neoproterozoic ages are interpreted as detrital zircon grains from pre-Cadomian basement. Pronounced age maxima between 600 and 520 Ma (late Neoproterozoic to early Cambrian) were found in skarn samples from the Moldanubian Zone, Svratka and Kutná Hora units. We interpret these as maximum ages of skarn precursor deposition. Apparent Cambrian?Ordovician?Silurian to early Devonian zircon ages were obtained from non-mineralized samples of the Moldanubian Zone and also in the Kutná Hora Unit. This wide temporal interval could reflect maximum ages of skarn

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Journal of Geosciences

ISSN

1802-6222

e-ISSN

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Svazek periodika

59

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

22

Strana od-do

367-388

Kód UT WoS článku

000346149500006

EID výsledku v databázi Scopus

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