Computer Science
Scientific paper
Aug 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984e%26psl..69..354n&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 69, no. 2, Aug. 1984, p. 354-364.
Computer Science
40
Abundance, Basalt, Earth Mantle, Molybdenum, Neutron Activation Analysis, Tungsten, Chondrites, Depletion, Nickel, Rare Earth Elements
Scientific paper
A neutron activation method was used to analyze and measure the concentrations of W and Mo in a large number of terrestrial samples in order to estimate the abundance of these elements in the earth's mantle. Mo and W abundances of 59 ppb and 10 ppb were found respectively. The W mantle abundance correlates well with uranium abundances and is a highly incompatible element. It is shown that some ocean floor basalts have much lower concentrations of W (2 to 65 ppb) than was previously believed. The data confirm the existence of high concentrations of moderately siderophile elements in the earth mantle. The abundance pattern in the mantle is explained in terms of a three level model of accretion and core formation in the mantle.
Newsom Horton E.
Palme Herbert
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