Geochemical constraints on core formation in the earth

Details Geochemical constraints on core formation in the earth Geochemical constraints on core formation in the earth

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.322..221j&link_type=abstract

Nature (ISSN 0028-0836), vol. 322, July 17, 1986, p. 221-228.

Physics

125

Abundance, Earth Core, Geochemistry, Planetary Evolution, Basalt, Constraints, Earth Mantle, Metals, Silicates

Scientific paper

The constraints placed on three current hypotheses of core formation in the earth by new experimental data on the partitioning of siderophile and chalcophile elements among metallic and silicate phases are discussed. Data on partition coefficients, siderophile abundances in the bulk earth, siderophile abundances in the upper mantle, and mineral-melt partitioning in basalts are reviewed and considered in terms of models involving inefficient core formation, equilibrium between an Fe-S-O metallic liquid and mantle silicates, and heterogeneous accretion/'chondritic veneer'. It is concluded that these three hypotheses can explain gross features of the mantle geochemistry, but none predicts siderophile and chalcophile element abundances to within a factor of two of observed values. Either present understanding of metal-silicate interactions and/or present understanding of the early earth requires revision.

Affiliated with

Also associated with

No associations

Rating

Geochemical constraints on core formation in 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 Geochemical constraints on core formation in the earth, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Geochemical constraints on core formation in the earth will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1655891