A Devious Equatorial Dipole Hypothesis: on the Low-Latitude Glaciations Problem and Geomagnetic Field Configuration in Late Precambrian

—The analysis of paleomagnetic data from Late Neoproterozoic complexes of Siberia and Australia is carried out. We show that the existing paleomagnetic datasets are in a disagreement with the concept of the axial-dipole configuration of the Late Neoproterozoic geomagnetic field: proposed non-actuali...

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Veröffentlicht in:Izvestiya. Physics of the solid earth 2020-11, Vol.56 (6), p.833-853
Hauptverfasser: Shatsillo, A. V., Rud’ko, S. V., Latysheva, I. V., Rud’ko, D. V., Fedyukin, I. V., Powerman, V. I., Kuznetsov, N. B.
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Sprache:eng
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Zusammenfassung:—The analysis of paleomagnetic data from Late Neoproterozoic complexes of Siberia and Australia is carried out. We show that the existing paleomagnetic datasets are in a disagreement with the concept of the axial-dipole configuration of the Late Neoproterozoic geomagnetic field: proposed non-actualistic models of the field do not reasonably explain the distribution of the paleomagnetic poles. We carried out analysis of paleomagnetic and virtual geomagnetic poles distribution based on simple geometric calculations. The analysis suggests that the configuration of the Late Neoproterozoic geomagnetic field was determined by the coexistence of a weak, long-lived source that was stably fixed in space, with a main dipole source that experienced sporadic multidirectional jumps within a certain preferred region of the Earth. Predominantly equatorial orientation of the main dipole source is substantiated by paleoclimate proxies. We propose a descriptive non-actualistic model of the Late Neoproterozoic geomagnetic field—the Devious Equatorial Dipole hypothesis, which brings paleomagnetic and paleoclimate data into accordance.
ISSN:1069-3513
1555-6506
DOI:10.1134/S1069351320060087