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Titolo:
Petrographical, geochemical and geochronological constraints on igneous clasts and sediments hosted in the Oligo-Miocene Bakony Molasse, Hungary: evidence for a Paleo-Drava River system
Autore:
Benedek, K; Nagy, ZR; Dunkl, I; Szabo, C; Jozsa, S;
Indirizzi:
Lorand Eotvos Univ, Dept Petrol & Geochem, H-1088 Budapest, Hungary LorandEotvos Univ Budapest Hungary H-1088 hem, H-1088 Budapest, Hungary Lorand Eotvos Univ, Hungarian Acad Sci, Geol Res Grp, H-1088 Budapest, Hungary Lorand Eotvos Univ Budapest Hungary H-1088 Grp, H-1088 Budapest, Hungary Hungarian Acad Sci, Lab Geochem Res, H-1112 Budapest, Hungary Hungarian Acad Sci Budapest Hungary H-1112 Res, H-1112 Budapest, Hungary
Titolo Testata:
INTERNATIONAL JOURNAL OF EARTH SCIENCES
fascicolo: 3, volume: 90, anno: 2001,
pagine: 519 - 533
SICI:
1437-3254(200108)90:3<519:PGAGCO>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
FISSION-TRACK DATA; CLINOPYROXENE COMPOSITION; EASTERN ALPS; PANNONIAN BASIN; THERMAL HISTORY; VOLCANISM; EVOLUTION; EXHUMATION; SANDSTONES; WINDOW;
Keywords:
Alpine Molasse; fission track dating; K/Ar dating; geochemistry; provenance analysis; Pannonian Basin; Oligocene-Miocene;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
72
Recensione:
Indirizzi per estratti:
Indirizzo: Benedek, K Lorand Eotvos Univ, Dept Petrol & Geochem, Muzeum Krt 4-A, H-1088 Budapest, Hungary Lorand Eotvos Univ Muzeum Krt 4-A Budapest Hungary H-1088 gary
Citazione:
K. Benedek et al., "Petrographical, geochemical and geochronological constraints on igneous clasts and sediments hosted in the Oligo-Miocene Bakony Molasse, Hungary: evidence for a Paleo-Drava River system", INT J E SCI, 90(3), 2001, pp. 519-533

Abstract

The provenance of igneous clasts and arenitic sediment enclosed within theBakony Molasse was studied using geochemical and geochronological methods. The majority of igneous clasts were eroded from the Oligocene Periadriaticmagmatic belt. A part of the andesite material has Eocene formation age. Rhyolitic pebbles originated from Permian sequences of the Greywacke zone orthe Gurktal Alps. Apatite fission track (FT) ages from the sandstone matrix (age clusters at similar to 75 and similar to 30 Ma) are typical for the Austroalpine nappe pile and for the cooling ages of Periadriatic magmatic belt. Variscan detrital zircon FT ages indicate source areas that had not suffered Alpine metamorphism, such as the Bakony Mountains, Drauzug and the Southern Alps. Another group of detrital zircon grains of Late Triassic-Jurassic FT age (mean: similar to 183 Ma) marks source zones with Mesozoic thermal overprint such as the Gurktal Alps and some Austroalpine regions. Zircon grains with Oligocene FT age (mean: similar to 34.7 Ma) were derived fromthe Periadriatic intrusives and their contact zones. On the basis of the new data, we propose that the ancestor of the recent Drava River had alreadyexisted in Oligo-Miocene time and distributed eroded material of the southern Eastern Alps to the east.

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Documento generato il 04/12/20 alle ore 13:01:01