Crustal age between the Clipperton and Clarion fracture zones

Details Crustal age between the Clipperton and Clarion fracture zones Crustal age between the Clipperton and Clarion fracture zones

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.2365e&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 24, p. 2365-2368.

Physics

4

Cretaceous-Tertiary Boundary, Crustal Fractures, Earth Crust, Equatorial Regions, Geochronology, Magnetic Anomalies, Magnetic Fields, Pacific Ocean

Scientific paper

Magnetic anomalies of 52-80 Ma age have been mapped in the equatorial Pacific in a region where they were previously unrecognized. These anomalies, now at 7-deg N are best modeled with crustal rocks of negative inclination, apparently because the crust was formed at a spreading ridge that was south of the magnetic equator in Late Cretaceous-Early Tertiary time. Magnetic anomalies recorded along a 5900-km trackline that follows a flowline of crustal generation show one long period, from 12 to 31 Ma, of apparent constant half-spreading rate over the 0 to 80 Ma represented.

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