Detail publikace

Petrogenesis of Cenozoic high-Mg (picritic) volcanic rocks in the České středohoří Mts. (Bohemian Massif, Czech Republic)

KRMÍČEK, L. ULRYCH, J. JELÍNEK, E. SKÁLA, R. KRMÍČKOVÁ, S. KORBELOVÁ, Z. BALOGH, K.

Originální název

Petrogenesis of Cenozoic high-Mg (picritic) volcanic rocks in the České středohoří Mts. (Bohemian Massif, Czech Republic)

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Representative samples of high-Mg (picritic) rocks of Eocene to Oligocene age (38 to 21 Ma) from the České středohoří Mts. (CSM) in the Ohře/Eger Rift were studied and compared with Cenozoic high-Mg rocks from the Bohemian Massif. The picritic rocks of the CSM correspond to picrite, meimechite and basanite to tephrite. Individual petrographic types are characterised by the association of mafic minerals: magnesian olivine (Fo86-80) + clinopyroxene (aluminian diopside) +/- amphibole (pargasite/kaersutite) +/- dark mica (ferroan phlogopite). The contents of incompatible elements, such as Nb, Ta, U, Th, the La-N/Yb-N ratios, and the overall Sr-Nd-Pb isotope signatures of the high-Mg rocks partly overlap the basanites of the usti Formation, also showing a similar age (44-21 Ma). The Pb isotope signature for all recognised high-Mg rock types is compatible with a variable contribution from an inherited (Variscan) orogenic Pb component preserved in their lithospheric mantle source. Both the high-Mg volcanic rocks from the CSM and from other areas of the Bohemian Massif require the involvement of a heterogenous lithospheric source. Their parental melts were generated by variable degree of melting of an olivine-rich peridotitic mantle, containing clinopyroxene-amphibole (+/- phlogopite) vein assemblages with highly radiogenic Sr and Pb signatures.

Klíčová slova

Ohře/Eger rift; Picrite; Meimechite; Basanite/tephrite; K-Ar ages; Sr-Nd-Pb isotopes

Autoři

KRMÍČEK, L.; ULRYCH, J.; JELÍNEK, E.; SKÁLA, R.; KRMÍČKOVÁ, S.; KORBELOVÁ, Z.; BALOGH, K.

Vydáno

15. 4. 2021

Nakladatel

SPRINGER WIEN

Místo

WIEN

ISSN

0930-0708

Periodikum

MINERALOGY AND PETROLOGY

Ročník

115

Číslo

2

Stát

Rakouská republika

Strany od

193

Strany do

211

Strany počet

19

URL

https://link.springer.com/article/10.1007/s00710-020-00729-5

BibTex

@article{BUT175340,
  author="Lukáš {Krmíček} and Jaromír {Ulrych} and Emil {Jelínek} and Roman {Skála} and Simona {Krmíčková} and Zuzana {Korbelová} and Kadosa {Balogh}",
  title="Petrogenesis of Cenozoic high-Mg (picritic) volcanic rocks in the České středohoří Mts. (Bohemian Massif, Czech Republic)",
  journal="MINERALOGY AND PETROLOGY",
  year="2021",
  volume="115",
  number="2",
  pages="193--211",
  doi="10.1007/s00710-020-00729-5",
  issn="0930-0708",
  url="https://link.springer.com/article/10.1007/s00710-020-00729-5"
}