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The record of Periadriatic volcanism in the Eastern Alpine Molasse zone and its palaeogeographic implications
Author(s) -
Brügel,
Dunkl,
Frisch,
Kuhlemann,
Zoltán Balogh
Publication year - 2000
Publication title -
terra nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.353
H-Index - 89
eISSN - 1365-3121
pISSN - 0954-4879
DOI - 10.1046/j.1365-3121.2000.00269.x
Subject(s) - molasse , geology , foreland basin , magmatism , volcanism , provenance , dacite , geochemistry , paleontology , massif , structural geology , andesite , earth science , volcanic rock , volcano , structural basin , tectonics
Precise provenance analysis of andesite and dacite pebbles from conglomerates in the Eastern Alpine Molasse zone, using geochemical and geochronological methods, provides evidence for a synorogenic volcanic chain in the Eastern Alps which is completely eroded today. This volcanism was related to Periadriatic magmatism along the Periadriatic lineament and took place in the Palaeogene, roughly between 40 and 30 Ma. The occurrence of remnants of these volcanic rocks together with other marker lithologies in the Eastern Alpine Molasse, implies an early to middle Miocene drainage system which was, in some respects, similar to the present Inn river system, but had a considerably larger catchment area, reaching farther south. The Palaeo‐Inn drained the central and eastern sections of the Periadriatic magmatic belt to the northern foreland basin.