Physics
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13.1442h&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 13, Dec. 1986, p. 1442-1445.
Physics
9
Geomagnetism, Magnetic Variations, Mexico, Paleomagnetism, Secular Variations, Confidence Limits, Magnetic Poles, Radioactive Age Determination, Volcanoes
Scientific paper
Ancient secular variation in Central Mexico was determined from paleomagnetic measurements on 45 independent lava flows ranging in age (C-14 and K-Ar dates) from 2,500 to 580,000 years B.P. All the analyzed flows are characterized by a normal polarity placing them within the Brunhes Chron. The paleosecular variation analysis yielded an angular standard deviation from the field of an axial dipole of 15.3 deg with 95 percent confidence limits f 13.4 deg and 17.9 deg, and that of the corresponding Virtual Geomagnetic Poles (VGPs) of 13.9 deg with confidence limits of 12.1 deg and 16.1 deg. These values are in agreement with those predicted by most statistical models of secular variation, but divergent from those obtained from low latitudes (19 deg N) such as Hawaii and Pagan Is.
Boehnel Harald
del Pozzo Ana Lillian Martin
Herrero-Bervera Emilio
Urrutia Fucugauchi Jaime
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