Cenozoic intraplate alkaline volcanism of Western Bohemia

Jaromír Ulrych, Vladimír Cajz, Edvin Pivec, Jiří Karel Novák, Čestmír Nekovařík, Kadosa Balogh

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Three independent volcanic suites have been recognised in W Bohemia: (i) the old unimodal alkaline ol. nephelinite-tephrite (29-19 Ma) in the Ohre Rift, (ii) two contemporaneous weakly (trachybasalt/trachyandesite-trachyte/rhyolite; 13-11 Ma) and strongly (ol. nephelinite-tephrite/basanite; 12-8 Ma) alkaline series in the flank of the Cheb-Domazlice Graben formed by the Tepla Highland and (iii) the young unimodal ol. melilitite/ol. nephelinite alkaline suite (2.0-0.12 Ma) at the intersection of the above mentioned structures in the Cheb Basin. The magmas of all the suites are mantle-derived and, in the case of the Cheb-Domazlice Graben series, associated with the AFC process. Two main fault systems: (i) ENE-WSW and (ii) NNW-SSE are developed in W Bohemia, corresponding to the directions of the two prominent taphrogenic structures. The southwesterly continuation of the Ohre Rift across the Marianske Lazne Fault is marked by volcanics only.

Original languageEnglish
Pages (from-to)346-351
Number of pages6
JournalStudia Geophysica et Geodaetica
Volume44
Issue number2
DOIs
Publication statusPublished - Jan 1 2000

Keywords

  • Alkaline volcanism
  • Cheb-Domazlice Graben
  • Ohre Rift
  • Tectonics
  • Western Bohemia

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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