An unconventional proterozoic paleomagnetic polar wander path for North America and its advantages

Details An unconventional proterozoic paleomagnetic polar wander path for North America and its advantages An unconventional proterozoic paleomagnetic polar wander path for North America and its advantages

May 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pepi...19..100b&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 19, Issue 1, p. 100-105.

Physics

Scientific paper

Statistically-contoured paleomagnetic poles for the Proterozoic of North America trace a sub-equatorial polar wander path that differs from more-conventional APW tracks. This path is modified by two types of hairpins, those that close in the northern hemisphere and are closely synchronous with the Hudsonian and the Grenvillian events, and those that close in the southern hemisphere and do not appear to have tectonic significance. The north-closing hairpins correspond to major shearing through the continent. The most plausible displacement of North America during the Proterozoic is an anti-clockwise rotation along a small circle centered close to the equator. A major reorganization of the APW path in the late Proterozoic probably corresponds to the beginning of subduction processes.

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