Preliminary Results of the Latitudinal and Time Dependence of Paleosecular Variation Dispersion Parameter during the Kiaman Superchron (318-262 Ma): AN Inter-Hemispheric Approach

One of the most fundamental questions about geomagnetic polarity reversals is that of stability. It has been suggested that the observed latitudinal dependence for the angular dispersion of paleosecular variation (PSV) and the inferred relationship with the mean geomagnetic reversal rate could be used as a good first-order tool for assessing the stability of geomagnetic field. Geomagnetic ';superchrons' - with single geomagnetic polarity period for ~ 10⁷ years - are so long they clearly do not represent an ordinary polarity change, but imply a fundamental transition in the dynamo processes. Studies on the PSV behavior throughout these lengthy geomagnetic intervals do represent an outstanding opportunity for providing useful constraints for understanding reversal processes and the geodynamic evolution. In this work, we present our preliminary results from an inter-hemispheric evaluation of the latitudinal and time dependence of the PSV stability through evaluation of scattering pattern of VGP datasets (estimation of dispersion parameter × corresponding paleolatitude (S_b-λ)) calculated from pre-selected paleomagnetic datasets (from the IAGA global paleomagnetic database) for the ~318-262 Myr Permo-Carboniferous Reversed Superchron (PCRS; also known as the Kiaman Reversed Superchron). Preliminary results for S_b-λ, observed from Southern Hemisphere covering from low to high paleolatitudes, are indicative of a lower PSV trending pattern during the Kiaman Superchron rather than the observed for high reversing frequency rate periods, similarly to the discussed for VGP datasets (low and mid-paleolatitudes) from ~118-83 Myr Cretaceous Normal Superchron.