The quasi-rigid premise in Precambrian tectonics

Details The quasi-rigid premise in Precambrian tectonics The quasi-rigid premise in Precambrian tectonics

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991e%26psl.107..559p&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 107, no. 3-4, Dec. 1991, p. 559-569.

Mathematics

Logic

1

Earth Crust, Paleomagnetism, Precambrian Period, Tectonics, Continents, Magnetic Poles, Plates (Tectonics)

Scientific paper

A simple test of the proposition that movements between multiple continental fragments driven by plate tectonics took place during the earlier eons of geological time is presented. A random distribution is derived when the collective palaeomagnetic poles are rotated into any quasi-rigid reconstruction. The test surmounts the most serious limitation of Precambrian palaeomagnetic data, namely, that the ages of magnetization are mostly poorly known. Confirmation of the quasi-rigid premise is derived in a debased form, but is not suppressed, by the deficiencies of the database. This palaeomagnetic constraint explains the distinctive isotopic, geochemical, and lithofacies signatures of the Proterozoid eon and is independently supported by the trend and long temporal continuity of crustal lineaments.

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