Total nitrogen content of deep sea basalts

Details Total nitrogen content of deep sea basalts Total nitrogen content of deep sea basalts

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46..371n&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 46, Mar. 1982, p. 371-379.

Physics

Abundance, Basalt, Earth Mantle, Nitrogen, Ocean Bottom, Atmospheric Models, Glass, Neutron Activation Analysis, Sea Water

Scientific paper

An estimate of the total nitrogen content of the earth's mantle, aimed at furnishing a further constraint for earth atmosphere origin and evolution models, was attempted through thermal neutron activation analysis via N-14(n,p)C-14 for the case of deep sea basalt glasses from the East Pacific Rise, the Mid-Atlantic Rift, and the Juan de Fuca Ridge. The increased nitrogen abundance of matrix material from the same samples as the glasses may be due to the incorporation of chemically-bound nitrogen from sea water, rather than dissolved molecular nitrogen. A discussion is presented of factors affecting observed basalt nitrogen content and its interpretation in terms of mantle nitrogen abundance. A 2 ppm N lower limit is estimated for the mantle.

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