Matuyama/Brunhes magnetic reversal recorded in flowstone from the Račiškaka pečina Cave (Slovenia)

0584556 - GLÚ 2025 RIV GB eng J - Článek v odborném periodiku
Pawlak, J. - Hercman, H. - Gąsiorowski, M. - Pruner, Petr - Błaszczyk, M. - Sierpień, P. - Matoušková, Šárka - Kdýr, Šimon - Schnabl, Petr - Zupan Hajna, N. - Mihevc, A. - Bosák, Pavel
Matuyama/Brunhes magnetic reversal recorded in flowstone from the Račiškaka pečina Cave (Slovenia).
Quaternary International. 686-687, March (2024), s. 4-17. ISSN 1040-6182. E-ISSN 1873-4553
Grant CEP: GA AV ČR KSK3046108
Grant ostatní: AV ČR(CZ) SAZU-16-03; AV ČR(CZ) SAZU-19-01; AV ČR(CZ) SAZU-22-08; AV ČR(CZ) PAN-17-22
Program: Bilaterální spolupráce; Bilaterální spolupráce; Bilaterální spolupráce; Bilaterální spolupráce
Institucionální podpora: RVO:67985831
Klíčová slova: Early/Middle pleistocene boundary * Palaeomagnetism * Matuyama/Brunhes reversal * Multiproxy palaeoenvironmental record * Speleothems * Classical Karst
Obor OECD: Geology
Impakt faktor: 2.2, rok: 2022
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S1040618223001416?via%3Dihub

A flowstone section in the Raˇciˇska peˇcina Cave (Classical Karst, SW Slovenia) records multiple chronostratigraphic and palaeoclimatic proxies that can be correlated with other records on the global scale (Mediterranean region, Japan). Its upper part has an excellent record of the Matuyama/Brunhes (M/B) magnetic reversal. The M/ B reversal zone, which is 6 mm in thickness, was detected by a high-resolution palaeomagnetic analysis of the sequence. An age model based on oxygen isotopic stratigraphy locates this quick transition in mid-MIS 19, between 777.9 and 777.2 ka, with the midpoint at 777.7 ka. The transition is marked by abrupt changes in stable isotopic compositions, trace element concentrations and flowstone fabrics that point to temperature and precipitation changes. Two distinct maxima in trace element concentrations at the beginning and the end of the M/B transition indicate two periods of higher precipitation, with increased washes of clay minerals into the cave. In addition, the stable isotopic (δ¹³C and δ¹⁸O) compositions indicate that significant cooling and high precipitation occurred during the M/B reversal within the generally warm MIS 19.
Trvalý link: https://hdl.handle.net/11104/0352536