Normal amplitude brunhes paleosecular variation at low‐latitudes: A paleomagnetic record from the Trans‐Mexican Volcanic Belt | Zendy

HerreroBervera Emilio | Zendy; Fucugauchi Jaime Urrutia | Zendy; Del Pozzo Ana Lillian Martin | Zendy; Böhnel Harald | Zendy; Guerrero José | Zendy

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Normal amplitude brunhes paleosecular variation at low‐latitudes: A paleomagnetic record from the Trans‐Mexican Volcanic Belt

Author(s) -

HerreroBervera Emilio,

Fucugauchi Jaime Urrutia,

Del Pozzo Ana Lillian Martin,

Böhnel Harald,

Guerrero José

Publication year - 1986

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/gl013i013p01442

Subject(s) - paleomagnetism , secular variation , geology , geomagnetic pole , geomagnetic secular variation , earth's magnetic field , latitude , lava , variation (astronomy) , paleontology , amplitude , geodesy , volcano , seismology , geophysics , astrophysics , physics , magnetic field , quantum mechanics , geomagnetic storm

Ancient secular variation in Central Mexico was determined from paleomagnetic measurements on 45 independent lava flows ranging in age ( 14 C 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° with 95% confidence limits of 13.4° and 17.9°, and that of the corresponding Virtual Geomagnetic Poles (VGPs) of 13.9° with confidence limits of 12.1° and 16.1°. These values are in agreement with those predicted by most statistical models of secular variation, but divergent from those obtained from low latitudes (19°N) such as Hawaii and Pagan Is.

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