Rapid continental crust formation at 1.7 Ga from a reservoir with chondritic isotope signatures, eastern Labrador

Details Rapid continental crust formation at 1.7 Ga from a reservoir with chondritic isotope signatures, eastern Labrador Rapid continental crust formation at 1.7 Ga from a reservoir with chondritic isotope signatures, eastern Labrador

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991e%26psl.102..110s&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 102, no. 2, Feb. 1991, p. 110-133. Research supported by NSERC and Mi

Physics

17

Chondrites, Earth Crust, Geochronology, Isotopes, Earth Planetary Structure, Labrador, Planetary Evolution, Radioactive Age Determination, Rare Earth Elements, Tectonics

Scientific paper

The origin of the tonalitic to granitic continental crust in eastern Labrador was investigated using results of analyses of major elements, trace elements, and REE, in conjunction with the Rb-Sr and Sm-Nd geochronology and the Pb, Nd, and Sr isotope systematics. Data are presented indicating that Labradorian granitoid crust was newly formed at 1.7 Ga from a source region which at the time of crust formation had chondritic isotope characteristics and Th/U ratio.

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