Statistical tests of additional plate boundaries from plate motion inversions

Details Statistical tests of additional plate boundaries from plate motion inversions Statistical tests of additional plate boundaries from plate motion inversions

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984e%26psl..69..401s&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 69, no. 2, Aug. 1984, p. 401-412. Research supported by the Petroleum

Other

83

Deformation, Earth Movements, Lithosphere, Plates (Tectonics), Statistical Analysis, Antarctic Regions, Earthquakes, Indian Ocean, North America, Paleomagnetism, Seismology, South America, Statistical Tests

Scientific paper

The application of the F-ratio test, a standard statistical technique, to the results of relative plate motion inversions has been investigated. The method tests whether the improvement in fit of the model to the data resulting from the addition of another plate to the model is greater than that expected purely by chance. This approach appears to be useful in determining whether additional plate boundaries are justified. Previous results have been confirmed favoring separate North American and South American plates with a boundary located beween 30 N and the equator. Using Chase's global relative motion data, it is shown that in addition to separate West African and Somalian plates, separate West Indian and Australian plates, with a best-fitting boundary between 70 E and 90 E, can be resolved. These results are generally consistent with the observation that the Indian plate's internal deformation extends somewhat westward of the Ninetyeast Ridge. The relative motion pole is similar to Minster and Jordan's and predicts the NW-SE compression observed in earthquake mechanisms near the Ninetyeast Ridge.

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