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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-24 9:35 |
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Conference: Bucharest University Faculty of Physics 2011 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Paleomagnetic time-average field results from the Quaternary volcanism from the Persani Mountains
Authors:
Andreea Craiu, Cristian Panaiotu
Affiliation:
University of Bucharest, Faculty of Physics, P.O.BOX MG-11, Magurele, Bucharest, Romania
E-mail
atugui@infp.ro, cristian.panaiotu@g.unibuc.ro
Keywords:
Paleomagnetism, Persani Mountains, Virtual Geomagnetic Poles
Abstract:
The alkali basaltic volcanism in the Persani Mountains represents an important region inside the Carpathians and in SE Europe. K-Ar and Ar-Ar ages combined with paleomagnetic data have demonstrated that the basaltic volcanism from Persani Mountains has occurred between 1.2 Ma and 0.6 Ma. After the removal of sites with latitude Virtual Geomagnetic Poles (VGP) les than 55° (geomagnetic excursions), 23 sites from 43 sampling sites can be used to study the time average geomagnetic field and paleosecular variation. Our results show that the mean paleomagnetic paleomagnetic pole for the Quaternary volcanism from the Persani Mountains is indistinguishable from the Earth spin axis. This result is consistent with field geometry with insignificant nonzero nonaxial dipole contributions and the absence of significant tectonic rotations. Dispersion of VGP is in agreement with available paleosecular variation data for this latitude and statistical models for the geomagnetic field.
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