Computer Science
Scientific paper
Jun 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999e%26psl.170...73m&link_type=abstract
Earth and Planetary Science Letters, Volume 170, Issue 1-2, p. 73-82.
Computer Science
5
Scientific paper
Rare kimberlite xenoliths have chemical characteristics that indicate an origin deep in the upper mantle, in the vicinity of the transition zone. The Nd isotopic compositions of minerals separated from several of these xenoliths suggest that these materials were emplaced into the African lithosphere at times ranging from approximately the time of kimberlite volcanism to many hundreds of millions of years earlier, possibly by periodic plume transport. They also indicate that these ultradeep samples have a complex chemical history involving both enrichment and depletion, and - assuming that there has not been re-equilibration within the lithosphere - that they sample an isotopically heterogeneous deep upper mantle. This would be expected if this part of the mantle contains a heterogeneous assemblage of subducted crustal and lithospheric components.
Haggerty Stephen E.
Macdougall Douglas J.
No associations
LandOfFree
Ultradeep xenoliths from African kimberlites: Sr and Nd isotopic compositions suggest complex history 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 Ultradeep xenoliths from African kimberlites: Sr and Nd isotopic compositions suggest complex history, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultradeep xenoliths from African kimberlites: Sr and Nd isotopic compositions suggest complex history will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1498892