Obliquity-driven mountain permafrost-related fluvial magnetic susceptibility cycles in the Quaternary mid-latitude long-term (2.5 Ma) fluvial Maros Fan in the Pannonian Basin ...

• Main Authors: Püspöki, Z, Gibbard, PL, Kiss, LF, McIntosh, RW, Thamó-Bozsó, E, Krassay, Z, Szappanos, B, Maigut, V, Kovács, P, Karácsony, D, Stercel, F, Visnovitz, F, Demény, K, Bereczki, L, Szőcs, T, Rotár-Szalkai, Á, Fancsik, T
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 2023
• Subjects: 37 Earth Sciences; 3709 Physical Geography and Environmental Geoscience; 3705 Geology; 3706 Geophysics; permafrost
• Online Access: https://dx.doi.org/10.17863/cam.96486; https://www.repository.cam.ac.uk/handle/1810/349226

Magnetic susceptibility (SUS) of the Quaternary long-term mid-latitude Maros fluvial fan (Pannonian Basin) was recorded to understand the stratigraphic features of source proximal fluvial depositional settings. Three fully cored 500 m deep boreholes were sampled with 0.5 m intervals; low field and frequency dependent magnetic susceptibility were measured, and complementary hysteresis and SEM-EDAX investigations were performed on selected samples. Logged SUS data were also used to log correlations established by a comparison of wireline log and laboratory measurements. The time-series analyses of the SUS records reveal the apparent occurrence of the ~41 ka frequency together with the customary ~100 ka cycles. Towards the source-distal sections the intensity of the ~41 ka cycles decreases, while that of the ~100 ka cycles remains strong. Stratigraphic and spectral similarities were observed between fluvial fan and loess SUS records however, based on complementary magnetic data, the magnetic phase of the ...