A dunántúli-középhegység helyzete és eoalpi fejlodéstörténete a keleti-alpok takarós rendszerében

Egy másfél évtizedes tektonikai model idoszerusége

Translated title of the contribution: Eo-alpine evolution of the transdanubian range in the nappe system of the Eastern Alps: Revival of a 15 years old tectonic model

Gábor Tari, F. Horváth

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Recently, several books on the geology of Hungary have reviewed the stratigraphy and structural evolution of the different megatectonic units using the principle of evolutionary cycles. The Transdanubian Range Unit (TRU) is considered by some authors to be exceptional, because in this unit a complicated Late Cretaceous to Eocene stratigraphy is associated with a simple structure. Namely, the unit bordered by two boundary faults (the Rába and Balaton Lines) is supposed to have been affected only by block-faulting during the Eo-Alpine orogeny. In this paper the authors reiterate a counter-opinion which they first expressed more than 15 years ago. Based primarily on the interpretation of data from more than 150 hydrocarbon exploration wells and 2000 km of seismic lines. It is argued that the TRU is actually characterized by a nappe structure and situated at the top of the Austroalpine nappe pile, as envisaged by UHLIG (1907) more than a century ago. It is also suggested that the seismically- mapped thrust planes at the fully sedimentary-covered north-western flank can be tied to the traditionally recognised thrust faults on the exposed south-eastern flank of the TRU. This leads to a straightforward allochthonous model and provides an inference about the original (Late Cretaceous to Eocene) continuity of the Transdanubian Range and the Northern Calcareous Alps. Finally, the paper argues that the complex Late Cretaceous stratigraphy of the TRU has been controlled by the development of flexural basins and highs in front of the advancing nappe systems.

Original languageHungarian
Pages (from-to)483-510
Number of pages28
JournalFoldtani Kozlony
Volume140
Issue number4
Publication statusPublished - 2010

Fingerprint

Stratigraphy
Tectonics
nappe
stratigraphy
Cretaceous
tectonics
Eocene
Alpine orogeny
Faulting
hydrocarbon exploration
Geology
thrust fault
Hydrocarbons
Piles
faulting
pile
thrust
geology
well
basin

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geology
  • Palaeontology
  • Stratigraphy

Cite this

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title = "A dun{\'a}nt{\'u}li-k{\"o}z{\'e}phegys{\'e}g helyzete {\'e}s eoalpi fejlod{\'e}st{\"o}rt{\'e}nete a keleti-alpok takar{\'o}s rendszer{\'e}ben: Egy m{\'a}sf{\'e}l {\'e}vtizedes tektonikai model idoszerus{\'e}ge",
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N2 - Recently, several books on the geology of Hungary have reviewed the stratigraphy and structural evolution of the different megatectonic units using the principle of evolutionary cycles. The Transdanubian Range Unit (TRU) is considered by some authors to be exceptional, because in this unit a complicated Late Cretaceous to Eocene stratigraphy is associated with a simple structure. Namely, the unit bordered by two boundary faults (the Rába and Balaton Lines) is supposed to have been affected only by block-faulting during the Eo-Alpine orogeny. In this paper the authors reiterate a counter-opinion which they first expressed more than 15 years ago. Based primarily on the interpretation of data from more than 150 hydrocarbon exploration wells and 2000 km of seismic lines. It is argued that the TRU is actually characterized by a nappe structure and situated at the top of the Austroalpine nappe pile, as envisaged by UHLIG (1907) more than a century ago. It is also suggested that the seismically- mapped thrust planes at the fully sedimentary-covered north-western flank can be tied to the traditionally recognised thrust faults on the exposed south-eastern flank of the TRU. This leads to a straightforward allochthonous model and provides an inference about the original (Late Cretaceous to Eocene) continuity of the Transdanubian Range and the Northern Calcareous Alps. Finally, the paper argues that the complex Late Cretaceous stratigraphy of the TRU has been controlled by the development of flexural basins and highs in front of the advancing nappe systems.

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KW - Austroalpine nappe system

KW - Seismic interpretation

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