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Geophys.J. Int. (1991)106,407-420 A 65Ma palaeomagneticpole for the Pacific plate from the skewness
 

Summary: Geophys.J. Int. (1991)106,407-420
A 65Ma palaeomagneticpole for the Pacific plate from the skewness
of magnetic anomalies 27r-31
Gary D. Acton* and Richard G. Gordon
Department of Geological Sciences,Northwestern Uniuersity, Euanston, IL 60208, USA
Accepted 1991 February 28. Received 1991 February 28; in original form 1990 March 28
S U M M A R Y
We use the skewnessof seafloor-spreadingmagnetic anomalies 27r-31 to determine
a revised Late Maastrichtian-early Palaeocene palaeomagnetic pole for the Pacific
plate. We used numerical experiments to estimate the potential information in
magnetic profiles that had not been previously analysed for skewnessinformation.
The results indicated that profiles obtained between the Murray and Galapagos
fracture zones would be the most useful becausein this region very different values
of remanent magnetic effective inclination are predicted for small changes in the
assumedpalaeomagneticpole position. Furthermore, thesedata would constrainthe
pole in the direction most poorly constrained by prior data. Using 50 skewness
estimates from 17 profiles, we compute a well-constrained pole that agrees with a
pole computed from other types of data with similar ages.These other data include
a seamount palaeomagneticpole, effective inclinations from two submarine ridges,
palaeolatitudes determined from azimuthally unoriented cores of submarine basalt

  

Source: Acton, Gary - Department of Geology, University of California, Davis

 

Collections: Geosciences