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Stratigraphy, facies and geodynamic settings of Jurassic formations in the Bukk Mountains, north Hungary; its relations with the other areas of the Neo-Tethyan realm

Janos Haas, Pal Pelikan, Agnes Gorog, Sandor Jozsa and Peter Ozsvart
Stratigraphy, facies and geodynamic settings of Jurassic formations in the Bukk Mountains, north Hungary; its relations with the other areas of the Neo-Tethyan realm
Geological Magazine (January 2013) 150 (1): 18-49

Abstract

Jurassic melange complexes related to the subduction of the Neotethys Ocean occur in the Bukk Mountains, North Hungary. This paper characterizes the sedimentary sequence of basin and slope facies that occur in the southwestern part of the Bukk Mountains, placing special emphasis on the redeposited sedimentary rocks (olistostromes, olistoliths: Monosbel 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 Monosbel 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 (Bukkzserc 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.


ISSN: 0016-7568
EISSN: 1469-5081
Coden: GEMGA4
Serial Title: Geological Magazine
Serial Volume: 150
Serial Issue: 1
Title: Stratigraphy, facies and geodynamic settings of Jurassic formations in the Bukk Mountains, north Hungary; its relations with the other areas of the Neo-Tethyan realm
Affiliation: Hungarian Academy of Sciences, Geological, Geophysical and Space Science Research Group, Budapest, Hungary
Pages: 18-49
Published: 201301
Text Language: English
Publisher: Cambridge University Press, London, United Kingdom
References: 112
Accession Number: 2013-021013
Categories: StratigraphySedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, geol. sketch maps
N47°30'00" - N48°00'00", E20°00'00" - E20°30'00"
Secondary Affiliation: Geological Institute of Hungary, HUN, HungaryEotvos Lorand University, HUN, HungaryHungarian Museum of Natural History, HUN, Hungary
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Cambridge University Press. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201314
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