Mathematics – Logic
Scientific paper
Dec 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phdt........14d&link_type=abstract
Ph.D. Thesis California Inst. of Tech., Pasadena.
Mathematics
Logic
6
Earth Mantle, Geological Surveys, Igneous Rocks, Magma, Neodymium Isotopes, Basalt, Earth Planetary Structure, Planetary Evolution, Samarium
Scientific paper
Nd-143/Nd-144 was measured in terrestrial rock samples of different ages to establish the characteristics of Nd isotopic evolution in the crust and mantle. Many continental igneous rocks are derived from a reservoir with chondritic REE pattern which may represent primary undifferentiated material remaining since the formation of the earth, while oceanic igneous rocks are derived from highly differentiated reservoirs. The mantle beneath the oceans appears to be more depleted in crustal components than is the mantle which is subjacent to the continental crust. In general, basalts are not derived from mantle reservoirs which have been light REE-enriched for long times.
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