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001-es BibID:	BIBFORM103286
035-os BibID:	(WOS)000487879800001 (Scopus)85073958239
Első szerző:	Püspöki Zoltán (geológus)
Cím:	High-resolution stratigraphy of a Quaternary fluvial deposit based on magnetic susceptibility variations (Jászság Basin, Hungary) / Zoltán Püspöki, Tímea Fogarassy-Pummer, Edit Thamó-Bozsó, Bernadett Berényi, Ágnes Cserkész-Nagy, Bálint Szappanos, Emő Márton, Zoltán Lantos, Annamária Nádor, Tamás Fancsik, Ferenc Stercel, Ágnes Tóth-Makk, Richard W. Mcintosh, Teodóra Szőcs, Enikő Faragó
Dátum:	2019
ISSN:	0300-9483
Megjegyzések:	Quaternary fluvial succession of the Jaszsag Basin (Hungary) was investigated, challenging the stratigraphical potential of 'early postglacial fluvial magnetic susceptibility episodes' recognized earlier in the Koros Basin. Low field magnetic susceptibility (MS) was measured in four boreholes from the basin centre and margins, representing channel and flood-plain environments. Statistical distributions of MS data contain significant sets of outliers, regardless of facies conditions. The downhole distribution of these outliers produces magnetic susceptibility cycles. Supported by magnetic susceptibility cycles, high-resolution facies correlations were performed reflecting a steady palaeohydrographical situation in the area, with a trunk river to the southeast and tributaries to the northwest. SEM-EDX data revealed that ferromagnetic grains are responsible for the outlying MS values. The heterogeneous association of magnetite indicates a catchment area with volcanic and metamorphic rocks, while the group of small (<5 mu m) magnetite octahedrons originated from nearby rhyolitic tuff formations. Magnetic grains were transported along channel belts, while small (<2 mu m) magnetic particles were floated onto flood-plains attached to clays. Climatic control is indicated by peaks at similar to 100 ka frequency in spectra of MS records and was also detected in palaeosol development and in flood frequency using the spectra of measured colour (similar to 100 ka) and logged resistivity (similar to 100 ka, similar to 41 ka), respectively. The climate-dependent MS signal traceable far into the basin in both channel and flood-plain environments can be summoned when the Quaternary fluvial succession of the Pannonian Basin is investigated, assuming some sources of magnetite in the catchment areas. According to the concept of 'fluvial magnetic susceptibility episodes', the early postglacial escape and spreading of the magnetite fraction control the MS signal that can support mapping of the unconformable Quaternary base and building of high-resolution models of aquifers.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Boreas. - 49 : 1 (2019), p. 181-199. -
További szerzők:	Fogarassy-Pummer Tímea (1991-) (geológus) Thamó-Bozsó Edit Berényi Bernadett Cserkész-Nagy Ágnes Szappanos Bálint Márton Emő Lantos Zoltán Nádor Annamária Fancsik Tamás Stercel Ferenc Tóth-Makk Ágnes Szőcs Teodóra McIntosh, Richard William (1978-) (geológus) Faragó Enikő (1991-) (geológus)
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