Nd isotopic evidence from Wopmay Orogen for 2.0-2.4 Ga crust in western North America

Details Nd isotopic evidence from Wopmay Orogen for 2.0-2.4 Ga crust in western North America Nd isotopic evidence from Wopmay Orogen for 2.0-2.4 Ga crust in western North America

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989e%26psl..94..217b&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 94, no. 3-4, Sept. 1989, p. 217-230.

Mathematics

Logic

22

Earth Crust, Gallium, Neodymium Isotopes, Planetary Composition, Geochemistry, Geochronology, Geological Faults, North America, Planetary Evolution

Scientific paper

Nd isotopic data and remanants of three compositionally diverse magmatic arcs from the 1.9 Ga Wopmay Orogen, Canada suggest involvement of the crust in the range of 2.0 to 2.4 Ga. Samples of plutonic and volcanic rocks from the arcs yield a narrow rand of initial sigma(Nd) from -1.8 to +0.3. Geochronologic and isotopic data from other Precambrian cratons are reviewed, suggesting that much of western North America is underlain by 2.0-2.4 Ga crust.

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