Provenance and palaeogeographic evolution of Lower Miocene sediments in the eastern North Alpine Foreland Basin

Detrital heavy mineral analysis and sediment chemistry of Lower Miocene sediments of the Lower Austrian Northern Alpine Foreland Basin generally indicate provenance from metapelitic source rocks. The sediments of the Traisen Formation (Ottnangian) were primarily derived from Alpine sources such as t...

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Bibliographic Details
Published in:Swiss Journal of geosciences 2019-12, Vol.112 (2-3), p.269-286
Main Authors: Knierzinger, Wolfgang, Wagreich, Michael, Palzer-Khomenko, Markus, Gier, Susanne, Meszar, Maria, Lee, Eun Young, Koukal, Veronika, Strauss, Philipp
Format: Article
Language:English
Subjects:
Basins
Data points
Earth and Environmental Science
Earth Sciences
Flysch
Geology
Massifs
Metamorphic rocks
Miocene
Mountains
Organic chemistry
Palaeogene
Provenance
Rock
Sediment
Sediment chemistry
Sediments
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Summary:Detrital heavy mineral analysis and sediment chemistry of Lower Miocene sediments of the Lower Austrian Northern Alpine Foreland Basin generally indicate provenance from metapelitic source rocks. The sediments of the Traisen Formation (Ottnangian) were primarily derived from Alpine sources such as the Austroalpine crystalline units of the Eastern Alps and reworked and eroded siliciclastics strata on top of the Northern Calcareous Alps and, in addition, low-grade metamorphic rocks of the Bohemian Massif. Ottnangian and Karpatian sediments in the subground of the northern Lower Austrian Molasse basin were mainly fed from the same southern sources, from low-grade metamorphic rocks of the Bohemian Massif and via resedimentation of Lower Miocene and Palaeogene of the Waschberg–Ždánice Unit and the Vienna Basin. A large-scale input of material from the Rhenodanubian Flysch Zone and of higher-grade metamorphic units and granites of the Bohemian Massif in the Lower Miocene Molasse basin can be ruled out. A compilation of well sections and heavy mineral data point to the existence of a partly emerged, N–S oriented ridge during the Egerian.
ISSN:1661-8726
1661-8734
DOI:10.1007/s00015-018-0312-9