Palaeomagnetic data suggest link between the Archaean-Proterozoic boundary and inner-core nucleation

Details Palaeomagnetic data suggest link between the Archaean-Proterozoic boundary and inner-core nucleation Palaeomagnetic data suggest link between the Archaean-Proterozoic boundary and inner-core nucleation

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.329..233h&link_type=abstract

Nature (ISSN 0028-0836), vol. 329, Sept. 17, 1987, p. 233-237.

Computer Science

35

Dynamo Theory, Earth Core, Earth Planetary Structure, Geomagnetism, Paleomagnetism, Continental Drift, Cratons, Field Strength, Planetary Composition, Polar Wandering (Geology)

Scientific paper

Recent determinations of the geomagnetic paleointensity using Archean and early Proterozoic samples from the Kaapvaal and Superior cratons are consistent with a sharp increase in the magnitude of the geomagnetic field between 2.7 and 2.1 Gyr. Analysis of published late Archean and early Proterozoic apparent polar wander paths shows that an abrupt change in the rate and style of continental motion occurred at about 2.5-2.6 Gyr ago. If this change is also interpreted to be related to the growth of an inner core, than a conjecture arises that the Archean-Proterozoic transition is related to inner core nucleation.

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