Late Miocene volcanic activity in the České středohoří Mountains (Ohře/Eger Graben, northern Bohemia)

Vladimír Cajz, Vladislav Rapprich, Vojtěch Erban, Z. Pécskay, Miroslav Radoň

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

First occurrences of superficial bodies of Late Miocene volcanic activity were found in the western part of the České stř edohoří Volcanic Complex (CSVC) and extended our knowledge of its volcanostratigraphy. Their K-Ar ages (9.59, 9.61 and 11.36 Ma) correspond to the age of alkaline basaltic rocks of the youngest known Intrusive Suite of this area. Unlike the previously known subvolcanic bodies of this system, the newly observed bodies are represented by superficial products: two scoria cones with remnants of lava flows and one exclusive lava flow produced from a lava cone. The magmas forming all three occurrences are basanitic. Their primitive chemical composition Sr (0.70347-0.70361) and Nd (0.51279-0.51284) isotope ratios are similar to the products of the first and third volcanic formation of the CSVC. The proved existence of superficial products of the youngest volcanic formation, together with clear superposition relations to sedimentary formations and the chemical character of the youngest magmas in the central part of the Ohře (Eger) Graben support the stratigraphic scheme of volcanic activity in the České středohoří Mts. The eruptive style of the youngest formation volcanoes was purely magmatic (Strombolian) with no phreatic influence.

Original languageEnglish
Pages (from-to)519-533
Number of pages15
JournalGeologica Carpathica
Volume60
Issue number6
DOIs
Publication statusPublished - Dec 1 2009

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Keywords

  • Basanite
  • České středohoří
  • Cinder cone
  • Geochemistry
  • K-Ar dating
  • Štrbice Formation
  • Upper Miocene
  • Volcanostratigraphy

ASJC Scopus subject areas

  • Geology

Cite this

Late Miocene volcanic activity in the České středohoří Mountains (Ohře/Eger Graben, northern Bohemia). / Cajz, Vladimír; Rapprich, Vladislav; Erban, Vojtěch; Pécskay, Z.; Radoň, Miroslav.

In: Geologica Carpathica, Vol. 60, No. 6, 01.12.2009, p. 519-533.

Research output: Contribution to journalArticle

Cajz, Vladimír ; Rapprich, Vladislav ; Erban, Vojtěch ; Pécskay, Z. ; Radoň, Miroslav. / Late Miocene volcanic activity in the České středohoří Mountains (Ohře/Eger Graben, northern Bohemia). In: Geologica Carpathica. 2009 ; Vol. 60, No. 6. pp. 519-533.
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