A Nd and Sr isotopic study of the Trinity peridotite Implications for mantle evolution

Details A Nd and Sr isotopic study of the Trinity peridotite Implications for mantle evolution A Nd and Sr isotopic study of the Trinity peridotite Implications for mantle evolution

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984e%26psl..68..361j&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 68, no. 3, June 1984, p. 361-378.

Mathematics

Logic

36

Earth Mantle, Neodymium Isotopes, Peridotite, Planetary Evolution, Strontium Isotopes, Abundance, California, Chemical Composition, Geological Surveys, Mineralogy, Mountains, Samples

Scientific paper

Field evidence is reported which indicates that the Trinity peridotite in Northern California was partially melted during its rise as part of the upwelling convecting mantle at a spreading center. A Sm-Nd mineral isochron for a plagioclase Iherzolite yielded an age of about 427 Ma which is significantly higher than that expected for depleted mantle during this period. The age is interpreted as the time of crystallization of trapped melt in the plagioclase Iherzolite P-T field, and probably represents the time when the massif was incorporated as a part of the oceanic lithosphere. The Sm-Nd model age of the plagioclase Iherzolite total rock is 3.4 AE. This suggests that the peridotite was derived from a mantle that was depleted early in earth history. Although most available data indicate that the depleted upper mantle has been relatively well stirred through time, the Trinity data suggest that very ancient Nd isotropic values are preserved and chemical and physical heterogeneities are sometimes preserved in the depleted source of midocean ridge basalts as well as the oceanic lithosphere which they intrude.

Affiliated with

Also associated with

No associations

Rating

A Nd and Sr isotopic study of the Trinity peridotite Implications for mantle evolution 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 A Nd and Sr isotopic study of the Trinity peridotite Implications for mantle evolution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Nd and Sr isotopic study of the Trinity peridotite Implications for mantle evolution will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1853870