Quantitative bounds on the size spectrum of isotopic heterogeneity within the mantle

Details Quantitative bounds on the size spectrum of isotopic heterogeneity within the mantle Quantitative bounds on the size spectrum of isotopic heterogeneity within the mantle

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.323..317g&link_type=abstract

Nature (ISSN 0028-0836), vol. 323, Sept. 25, 1986, p. 317-320.

Mathematics

17

Earth Mantle, Heterogeneity, Isotopic Enrichment, Size Distribution, Spectrum Analysis, Strontium 87, Basalt, Mathematical Models, Ocean Bottom

Scientific paper

Quantitative bounds are placed on the size spectrum of mantle isotopic heterogeneities using the variations in Sr-87/Sr-86 ratios in oceanic basalts over different length scales. The spectrum is consistent with a flat spectrum filtered by magmatism. Such a white-noise spectrum indicates that there are many sources of anomalies at different wavelengths or that there is a global-scale source of anomalies operating continuously over thousands of millions of years, or some combination of both models.

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