Computer Science
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988e%26psl..87...59w&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 87, no. 1-2, Jan. 1988, p. 59-72. Research supported by the U.S. Nati
Computer Science
43
Earth Mantle, Igneous Rocks, Lithology, Radioactive Age Determination, Lead Isotopes, Mountains, Niobium Isotopes, Strontium Isotopes, Volcanoes
Scientific paper
Compositionally diverse Late Archean rocks (2.74-2.79 Ga old) from the eastern Beartooth Mountains (Montana and Wyoming) were studied and shown to have the same initial Pb, Sr, and Nd isotopic ratios. Lead and Sr initial ratios are higher and Nd initial values lower than predicted for rocks derived from model mantle sources and strongly indicate the involvement of an older crustal reservoir in the genesis of these rocks. A model involving subduction of continental detritus and contamination of the overlying mantle is suggested.
Mueller Paul A.
Wooden Joseph L.
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