Stratigraphy, facies and geodynamic settings of Jurassic formations in the Bükk Mountains, North Hungary

Its relations with the other areas of the Neotethyan realm

J. Haas, Pál Pelikán, Ágnes Görög, Sándor Józsa, Péter Ozsvárt

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Jurassic mélange complexes related to the subduction of the Neotethys Ocean occur in the Bükk Mountains, North Hungary. This paper characterizes the sedimentary sequence of basin and slope facies that occur in the southwestern part of the Bükk Mountains, placing special emphasis on the redeposited sedimentary rocks (olistostromes, olistoliths: Mónosbél Group) in order to obtain information on the provenance of the clasts, and the mode and time of their redeposition. The series of formations studied shows a general coarsening-upwards trend. Based on radiolarians and foraminifera, the Mónosbél Group formed in Early to Late Bathonian time. The lower part of the complex is typified by a predominance of pelagic carbonates, shale and radiolarite with andesitic volcaniclastic intercalations. The higher part of the succession is characterized by polymictic olistostromes. Large olistoliths that are predominantly blocks of Bathonian shallow marine limestone (Bükkzsé rc Limestone) appear in the upper part of the sequence. Based on the biostratigraphic and sedimentological data, results of analyses of the redeposited clasts and taking into consideration the concepts of the development of the western Neotethys domain, the evolutionary stages of the sedimentary basins were defined. The onset of the compressional stage led to initiation of nappe stacking that led to the formation of polymict olistostromes and then to the redeposition of large blocks derived from out-of-sequence nappes of the former platform foreland.

Original languageEnglish
Pages (from-to)18-49
Number of pages32
JournalGeological Magazine
Volume150
Issue number1
DOIs
Publication statusPublished - Jan 2013

Fingerprint

olistostrome
geodynamics
Bathonian
stratigraphy
redeposition
Jurassic
nappe
clast
mountain
limestone
radiolarite
sedimentary sequence
stacking
sedimentary basin
foraminifera
provenance
sedimentary rock
shale
subduction
carbonate

Keywords

  • biostratigraphy
  • foraminifera
  • gravity deposits
  • Neotethys
  • polymictic olistostrome
  • radiolaria
  • subduction

ASJC Scopus subject areas

  • Geology

Cite this

Stratigraphy, facies and geodynamic settings of Jurassic formations in the Bükk Mountains, North Hungary : Its relations with the other areas of the Neotethyan realm. / Haas, J.; Pelikán, Pál; Görög, Ágnes; Józsa, Sándor; Ozsvárt, Péter.

In: Geological Magazine, Vol. 150, No. 1, 01.2013, p. 18-49.

Research output: Contribution to journalArticle

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abstract = "Jurassic m{\'e}lange complexes related to the subduction of the Neotethys Ocean occur in the B{\"u}kk Mountains, North Hungary. This paper characterizes the sedimentary sequence of basin and slope facies that occur in the southwestern part of the B{\"u}kk Mountains, placing special emphasis on the redeposited sedimentary rocks (olistostromes, olistoliths: M{\'o}nosb{\'e}l Group) in order to obtain information on the provenance of the clasts, and the mode and time of their redeposition. The series of formations studied shows a general coarsening-upwards trend. Based on radiolarians and foraminifera, the M{\'o}nosb{\'e}l Group formed in Early to Late Bathonian time. The lower part of the complex is typified by a predominance of pelagic carbonates, shale and radiolarite with andesitic volcaniclastic intercalations. The higher part of the succession is characterized by polymictic olistostromes. Large olistoliths that are predominantly blocks of Bathonian shallow marine limestone (B{\"u}kkzs{\'e} rc Limestone) appear in the upper part of the sequence. Based on the biostratigraphic and sedimentological data, results of analyses of the redeposited clasts and taking into consideration the concepts of the development of the western Neotethys domain, the evolutionary stages of the sedimentary basins were defined. The onset of the compressional stage led to initiation of nappe stacking that led to the formation of polymict olistostromes and then to the redeposition of large blocks derived from out-of-sequence nappes of the former platform foreland.",
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