Influence of Factors Distorting the Paleomagnetic Record on the Estimation of the Parameters of Ancient Secular Geomagnetic Variations Based on the Results of Layer-by-Layer Studies of Sedimentary Sections

Abstract

Abstract: The results of numerical modeling of the influence of the main factors distorting the paleomagnetic record in sedimentary rocks are presented: signal averaging and inclination underestimation and estimation of the parameters of secular variations (their amplitude, the degree of elongation of the distribution of directions, and the direction of elongation of this distribution) recorded in sedimentary sections.As an example of the practical application of the results obtained on their basis, the prospects of the Honako-2 section, one of the best loess sections in Central Asia, are assessed for the possible discovery of records of geomagnetic excursions in this section. Numerical estimates are obtained for the probability of detecting excursions of different types in the paleomagnetic record of the upper levels of this section.