Nd isotopic evolution of the Precambrian mantle

Details Nd isotopic evolution of the Precambrian mantle Nd isotopic evolution of the Precambrian mantle

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989e%26psl..93...14s&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 93, no. 1, May 1989, p. 14-22. Research supported by NSERC and Format

Mathematics

Logic

15

Earth Mantle, Geochemistry, Neodymium Isotopes, Planetary Evolution, Precambrian Period, Basalt, Earth Crust, Geochronology, Heterogeneity

Scientific paper

Nd isotopic data for Precambrian mafic and ultramafic volcanics show that the evolution of the depleted mantle has not followed a linear path; from 2.0 Ga to the present, this reservoir's depletion is inferred to have occurred at an Nd evolution rate of 2.2 units/Ga. The anomalously high Nd-evolution values of Early Archean Al-depleted komatiites require the Nd-evolution rate of their source region to have evolved at 2-4 times the rate of the Proterozoic-Phanerozoic depleted mantle. The isotopic heterogeneity noted in the Archean, in conjunction with petrological reasoning favoring distinct source regions for tholeiites and komatites, indicate compositional layering of the Archean mantle.

Affiliated with

Also associated with

No associations

Rating

Nd isotopic evolution of the Precambrian mantle does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Nd isotopic evolution of the Precambrian mantle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nd isotopic evolution of the Precambrian mantle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1874371