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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:Pummer Tímea 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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2.

001-es BibID:BIBFORM088325
Első szerző:Püspöki Zoltán (geológus)
Cím:High-resolution stratigraphy of Quaternary fluvial deposits in the Makó Trough and the Danube-Tisza Interfluve, Hungary, based on magnetic susceptibility data / Zoltán Püspöki, Tímea Fogarassy-Pummer, Edit Thamó-Bozsó, György Falus, Ágnes Cserkész-Nagy, Bálint Szappanos, Emő Márton, Zoltán Lantos, Szilárd Szabó, Ferenc Stercel, Ágnes Tóth-Makk, Richard W. Mcintosh, Teodóra Szőcs, Péter Pálóczy, Tamás Fancsik
Dátum:2021
ISSN:0300-9483
Megjegyzések:High-resolution stratigraphical architecture of a Quaternary fluvial succession in the Makó Trough and the Danube?Tisza Interfluve (Pannonian Basin, Hungary) was investigated based on low field magnetic susceptibility (MS) measurements of seven fully cored boreholes, interpreted on the basis of the early postglacial magnetic susceptibility episodes previously described in the Körös and Jászság Basins. To confirm the reliability of the Dévaványa and Vésztő MS records (Körös Basin), the published magnetostratigraphical data were re?investigated revealing the consequent arrangement of the MS peaks correlated with the Jingbian section and the short?lived polarity reversals correlated with the Geomagnetic Instability Time Scale. The Quaternary climatic regime in the Körös Basin begins in the late Pliocene at 2.7 Ma. The correlation between the Körös Basin (Dévaványa) and Makó Trough (Mindszent) was confirmed by the multi-proxy spectral investigation of the Mindszent section, revealing ~100? and ~41?ka cycles in the MS, colour, logged spontaneous potential and resistivity records. Based on MS records of the seven boreholes, the base of the Quaternary can be identified irrespective of the facies, age and climatic phase of the lowermost Quaternary strata. By performing MS and log correlation of 131 boreholes, extended unconformities were detected in the Quaternary profiles in the Danube-Tisza Interfluve (~1070?10, ~1920?10 and ~2300-10 ka) interpreted as sequence boundaries. Sedimentological and mineralogical data reveal a significant change at ~725-606 ka likely as a response to the ♭mid?Pleistocene transition', leading to the multiple branching of the Danube. SEM data revealed that ilmenite is also responsible for the development of the early postglacial magnetic susceptibility episodes. This increases the stratigraphical potential of fluvial successions with catchment area that contain metamorphic rocks. A gradual retreat of permafrost zone determines long?term temporal trends of the climatically controlled fluvial magnetic susceptibility episodes, causing upward decreasing trends in the time series.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Boreas. - 50 : 1 (2021), p. 205-223. -
További szerzők:Pummer Tímea Thamó-Bozsó Edit Falus György (Budapest) Cserkész-Nagy Ágnes Szappanos Bálint Márton Emő Lantos Zoltán Szabó Szilárd (1974-) (geográfus) Stercel Ferenc Tóth-Makk Ágnes McIntosh, Richard William (1978-) (geológus) Szőcs Teodóra Pálóczy Péter Fancsik Tamás
Pályázati támogatás:NKFIH-OTKA K-131353
OTKA
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3.

001-es BibID:BIBFORM081286
Első szerző:Püspöki Zoltán (geológus)
Cím:Magnetic susceptibility as a possible correlation tool in Quaternary alluvial stratigraphy / Zoltán Püspöki, István J. Kovács, Tamás Fancsik, Annamária Nádor, Edit Thamó?Bozsó, Ágnes Tóth?Makk, Beatrix Udvardi, Péter Kónya, Judit Füri, Zsolt Bendő, László Zilahi?Sebess, Ferenc Stercel, Ágnes Gulyás, Richard W. Mcintosh
Dátum:2016
ISSN:0300-9483
Megjegyzések:Correlation of the fluvial magnetic susceptibility (MS) record of borehole Devavanya?1 in the Körös Basin (eastern Hungary) with Chinese aeolian MS records (Jingbian, Lingtai) and the marine [delta]18O record from the Equatorial Pacific (V28?239) is established here based on cross?correlations and singular spectral analysis. A basin?scale well?to?well correlation based on magnetic susceptibility records was also performed involving unpublished cores. To refine the age model, a Monte Carlo simulation was conducted using the Chinese Jingbian section as a tuning target. Spectral analysis of the tuned record revealed c. 400, c. 100 and c. 41 ka cycles over the 2.5 million years of the Quaternary fluvial succession. To ensure a complementary palaeoclimate proxy, the full width at half maximum of smectites was measured as a facies?independent indicator of weathering intensity. This investigation was carried out on a subset of samples involved in MS measurements representing a c. 400 ka time interval across the top of the Olduvai subchron. A phase?shift between MS and weathering intensity recorded in the clay mineralogy indicates different response times of the considered proxies. The fluvial MS record is determined by the climatic control on delivery and preservation of magnetic minerals, mainly of magnetite. Under cold?and?dry climate these minerals were released owing to frost shattering in the adjacent hinterlands and were transported to alluvial plains in the early postglacial periods thanks to the increasing discharge of rivers. With further warming the weathering?sensitive magnetic minerals soon disappeared from the soils of the catchment area and thus from the fluvial load. As a result, in fluvial successions early postglacial warmings are expressed by the occurrences of MS maxima (magnetic episodes), while the palaeotemperature maximum and the subsequent cooling remain concealed within the tract of low MS values. The early postglacial magnetic episodes may serve as ideal stratigraphical markers in regional and global correlations.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Boreas. - 45 : 4 (2016), p. 861-875. -
További szerzők:Kovács István János Fancsik Tamás Nádor Annamária Thamó-Bozsó Edit Tóth-Makk Ágnes Udvardi Beatrix (Budapest) Kónya Péter (1978-) (geográfus, geológia) Füri Judit Bendő Zsolt Zilahi-Sebess László Stercel Ferenc Gulyás Ágnes McIntosh, Richard William (1978-) (geológus)
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