Neoproterozoic to Cenozoic magmatism in the central part of the Bohemian Massif (Czech Republic): Isotopic tracking of the evolution of the mantle through the Variscan orogeny

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F19%3A00503956" target="_blank" >RIV/67985831:_____/19:00503956 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0024493718304900?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0024493718304900?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.lithos.2018.12.028" target="_blank" >10.1016/j.lithos.2018.12.028</a>

Result language

angličtina

Original language name

Neoproterozoic to Cenozoic magmatism in the central part of the Bohemian Massif (Czech Republic): Isotopic tracking of the evolution of the mantle through the Variscan orogeny

Original language description

The evolution of the mantle source beneath the Teplá-Barrandian block of the Bohemian Massif (Czech Republic) is tracked from the Late Neoproterozoic to the Cenozoic in order to examine the coupling between the crust and underlying continental lithospheric mantle (CLM) during the Late Paleozoic Variscan orogeny. Late Neoproterozoic mafic rocks occur as two types. The oldest type resembles N-MORB, whereas the youngest is characterized by moderate LREE enrichment and within-plate trace element characteristics. Taken together, the geochemistry of the mafic rocks suggests they were emplaced in an intra-oceanic back-arc basin to within-plate setting. Early Paleozoic (Ordovician to Early Devonian) mafic rocks are alkaline, enriched in LREE and Nb relative to HREE and were probably derived from a garnet lherzolite mantle source. Late Paleozoic mafic magmatism occurred during the extensional collapse phase of the Variscan orogen, in the aftermath of the collision between Gondwana and Laurussia. The basalts are within-plate, and transitional between alkaline and tholeiitic compositions but show a relative depletion of Nb. Cenozoic volcanic rocks in the Teplá-Barrandian zone are local representatives of regionally extensive Late Cretaceous to Cenozoic Central European Volcanic Province. The rocks are within-plate, alkaline basalts enriched in LREE and Nb and were derived from garnet lherzolite mantle. These data suggest significant input from upwelling asthenospheric mantle, implying that part of the Permian CLM mantle was re-fertilized by a juvenile post-Variscan CLM.

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

10507 - Volcanology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Name of the periodical

Lithos

ISSN

0024-4937

e-ISSN

—

Volume of the periodical

326/327

Issue of the periodical within the volume

February 2019

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

12

Pages from-to

358-369

UT code for WoS article

000458942700022

EID of the result in the Scopus database

2-s2.0-85059682678