Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980rspta.297..139s&link_type=abstract
Royal Society (London), Philosophical Transactions, Series A, vol. 297, no. 1431, July 24, 1980, p. 139-146.
Astronomy and Astrophysics
Astronomy
Chemical Composition, Earth Mantle, Geochemistry, Planetary Evolution, Terrestrial Planets, Abundance, Astronomical Models, Deposition, Earth Core, Earth Crust, Heterogeneity, Particle Size Distribution
Scientific paper
The heterogeneity of the mantle can be viewed in the context of models for accretion of the terrestrial planets from the solar nebula. Oxygen isotope ratios and mineralogy indicate the existence of hot planetesimals of diverse compositions. Assuming that nebular condensates range from a reduced state near the sun to an oxidized state near Jupiter, a new model is proposed for heterogeneous accretion of the earth beginning with hot, reduced condensates and ending with cool, oxidized condensates. The Ganapathy-Anders cosmochemical model for the bulk composition of the earth was tested by summing measured compositions for the three outer zones and likely compositions for the inner zones. Revisions are suggested, including reduction of the content of the early condensate from that suggested by taking the U concentration as 30 ng/g, as suggested by the naive interpretation of the heat flow.
No associations
LandOfFree
The relation of mantle heterogeneity to the bulk composition and origin of the earth 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 The relation of mantle heterogeneity to the bulk composition and origin of the earth, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The relation of mantle heterogeneity to the bulk composition and origin of the earth will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-804702