The detection of common cycles in magnetic susceptibility observed in distant magnetostratigraphic sections

0378776 - GLÚ 2013 RIV CZ eng J - Článek v odborném periodiku
Man, Otakar - Pruner, Petr - Schnabl, Petr
The detection of common cycles in magnetic susceptibility observed in distant magnetostratigraphic sections.
Studia geophysica et geodaetica. Roč. 56, č. 3 (2012), s. 735-750. ISSN 0039-3169. E-ISSN 1573-1626
Grant CEP: GA ČR GA205/07/1365
Výzkumný záměr: CEZ:AV0Z30130516
Klíčová slova: time-series analysis * spectral analysis * magnetostratigraphy * magnetic susceptibility * Milankovitch cycles
Kód oboru RIV: DB - Geologie a mineralogie
Impakt faktor: 0.975, rok: 2012

The data obtained by former magnetostartigraphic studies of sections of Jurassic/Cretaceous age located at Brodno, W. Slovakia, and Puert Escaño, S. Spain, about 2200 km apart, are herein reprocessed in order to detect environmental cycles recorded by magnetic susceptibility. The dating of the samples with respect to the geomagnetic polarity time scale enabled to estimate the power spectrum up to the frequency of 11 Myr⁻¹ as well as the phases corresponding to the spectral maxima. Using these frequencies and phases, we linked together the cycles detected with different sections. The hypothesis that their similarity results only from random coincidence had to be rejected for seven pairs of these cycles. The frequencies of these cycles are related to those of the recent modes of orbital eccentricity.
Trvalý link: http://hdl.handle.net/11104/0210163