Siderophile trace elements in the earth's oceanic crust and upper mantle

Details Siderophile trace elements in the earth's oceanic crust and upper mantle Siderophile trace elements in the earth's oceanic crust and upper mantle

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983lpsc...13..507c&link_type=abstract

In: Lunar and Planetary Science Conference, 13th, Houston, TX, March 15-19, 1982, Proceedings. Part 2. (A83-21281 07-91) Washing

Physics

4

Abundance, Basalt, Earth Crust, Earth Mantle, Geochemistry, Trace Elements, Fractionation, Gold, Iridium, Lunar Composition, Neutron Activation Analysis, Ocean Bottom, Rhenium

Scientific paper

Abundances of Re, Ir, and Au have been determined in a suite of oceanic basalts using radiochemical neutron activation analysis. Mean abundances of highly siderophile elements in the oceanic crust have been estimated. Siderophile elements are fractionated during basalt genesis. Iridium, Os, Pd, Pt, Ru, and Rh are depleted in basalts relative to peridotites. Gold is only slightly enriched in basalts. Rhenium is favorably partitioned into the liquid during partial melting of peridotites. Concentrations of siderophile elements in the earth's upper mantle are higher than that expected from core-mantle equilibrium. Six platinum-group elements, Re, and Au have chondritic ratios in the upper mantle, indicating the presence of a meteoritic component. The abundances of eight highly siderophile elements can be accounted for by 0.74% of CI-chondritelike material in the upper mantle. The low-Ti mare basalts have lower Re contents and lower Re/Ir ratios than oceanic basalts, which may be interpreted by a lower partition ratio of Re under extremely dry and reducing conditions in the lunar interior.

Affiliated with

Also associated with

No associations

Rating

Siderophile trace elements in the earth's oceanic crust and upper 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 Siderophile trace elements in the earth's oceanic crust and upper mantle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Siderophile trace elements in the earth's oceanic crust and upper mantle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1486921