Computer Science
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992e%26psl.108..217d&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 108, no. 4, Feb. 1992, p. 217-227. Research supported by Max-Planck-I
Computer Science
18
Basalt, Earth Crust, Geochemistry, Geodynamics, Iodine, Ocean Bottom, Glass, Neutron Activation Analysis, Oceanography
Scientific paper
Results of iodine analyses by neutron activation performed on 32 oceanic basalt glasses, one phonolite and three subaerial arc basalts are presented. The world-wide sample set encompasses all typical geodynamic settings. Most basalts, including all N-types, all but one T-type, and some P-types, exhibit low iodine concentrations (2.5-13 ppb). Very high I concentrations (up to 363 ppb) in a small number of samples are interpreted to be the result of a recycled component which includes organic matter of sedimentary origin. The scenario proposed to explain the chlorine/iodine ratio strongly favors the late veneer model of earth accretion. The scenario proposed to explain the terrestrial iodine distribution includes heterogeneous accretion, iodine extraction from the mantle simultaneous with continent formation, and depleted mantle homogenization.
Deruelle B.
Dreibus Gerlind
Jambon Albert
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