Detail publikace

The story of post-Variscan lamprophyres of the Bohemian Massif: from ultramafic (Upper Cretaceous–Paleocene) to alkaline (Eocene–Oligocene) types

ULRYCH, J. KRMÍČEK, L. ADAMOVIČ, J. KRMÍČKOVÁ, S.

Originální název

The story of post-Variscan lamprophyres of the Bohemian Massif: from ultramafic (Upper Cretaceous–Paleocene) to alkaline (Eocene–Oligocene) types

Typ

kapitola v knize

Jazyk

angličtina

Originální abstrakt

Post-Variscan lamprophyres of the Bohemian Massif hold the potential for the understanding of deep-mantle processes beneath the Bohemian Massif in association with mantle metasomatism as a consequence of Variscan subduction and Late Paleozoic extension in Central Europe, and tectonic processes between Variscan blocks. Two principal types of post-Variscan lamprophyres occur in the Bohemian Massif, contrasting in their age and composition: ultramafic lamprophyres of Late Cretaceous to Paleocene age and alkaline lamprophyres of Mid Eocene to Late Oligocene age. Combination of published and new whole-rock, isotope (Sr–Nd–Pb) and radiometric (K/Ar) data on lamprophyres of both types (including new data from samples from the deep boreholes) significantly contributes to the understanding of the changing tectonomagmatic position of post-Variscan volcanism in the Bohemian Massif. The striking shift in lamprophyre geochemistry is paralleled by a change in their structural position from the initial pre-rift period of volcanism to the developed syn-rift period and the related change in their mantle sources beneath the Bohemian Massif. The Late Cretaceous and Cenozoic volcanism is explained as related to lithospheric flexuring during the Alpine orogeny, resulting in an asthenospheric upwelling, or associated with the lithosphere deformation and perturbation of the thermal boundary layer.

Klíčová slova

Bohemian Massif; post-Variscan; lamprophyres; geochemistry

Autoři

ULRYCH, J.; KRMÍČEK, L.; ADAMOVIČ, J.; KRMÍČKOVÁ, S.

Vydáno

9. 2. 2022

Nakladatel

Geological Society of London

Místo

Bath

ISBN

978-1-78620-543-8

Kniha

Lamprophyres, Lamproites and Related Rocks: Tracers to Supercontinent Cycles and Metallogenesis

Edice

513

Číslo edice

1

ISSN

0305-8719

Periodikum

Geological Society Special Publication

Stát

neuvedeno

Strany od

237

Strany do

269

Strany počet

33

URL

https://sp.lyellcollection.org/content/513/1/237

BibTex

@inbook{BUT176749,
  author="Jaromír {Ulrych} and Lukáš {Krmíček} and Jiří {Adamovič} and Simona {Krmíčková}",
  title="The story of post-Variscan lamprophyres of the Bohemian Massif: from ultramafic (Upper Cretaceous–Paleocene) to alkaline (Eocene–Oligocene) types",
  booktitle="Lamprophyres, Lamproites and Related Rocks: Tracers to Supercontinent Cycles and Metallogenesis",
  year="2022",
  publisher="Geological Society of London",
  address="Bath",
  series="513",
  edition="1",
  pages="237--269",
  doi="10.1144/SP513-2020-233",
  isbn="978-1-78620-543-8",
  url="https://sp.lyellcollection.org/content/513/1/237"
}