CaltechAUTHORS
Published August 15, 1996 | Version Published
Journal Article Open

^(238)U-^(230)Th dating of a geomagnetic excursion in Quaternary basalts of the Albuquerque Volcanoes Field, New Mexico (USA)

Creators

  • 1. ROR icon California Institute of Technology
  • 2. ROR icon University of New Mexico

Abstract

We report the ^(238)U-^(230)Th age derived from samples from three basalt flows from the Albuquerque Volcanoes Field, central New Mexico (USA), interpreted to have erupted during one of the Bruhnes Chron geomagnetic field polarity events. Whole-rock samples and magnetite separates from two of the samples define an isochron with an age of 156±29 ka (2σ). It is now possible to determine the ages of geomagnetic excursions with reasonable precision, by the ^(238)U-^(230)Th method, using basalts erupted between possibly 25 and up to 250 ka. Although a strict correlation of the polarity event recorded by the Albuquerque lavas with other high amplitude field phenomena in the latest Quaternary is not yet possible, the Blake and the less well-documented Old Crow and Biwa I/Jamaica events are likely candidates.

Additional Information

© 1996 by the American Geophysical Union. We are grateful to N. Thouveny and an anonymous reviewer for careful and constructive reviews. This work was supported by DOE Grant DE FG 03 88 ER 13851 and NSF-EAR Grant 9205596. Division contribution #5608(911).

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Additional details

Identifiers

Eprint ID
42431
Resolver ID
CaltechAUTHORS:20131113-134356119

Funding

Department of Energy (DOE)
DE FG 03 88 ER 13851
NSF
EAR-9205596

Dates

Created
2013-11-13
Created from EPrint's datestamp field
Updated
2021-11-10
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Caltech Custom Metadata

Other Numbering System Name
Lunatic Asylum Lab
Other Numbering System Identifier
911