Statistics – Applications
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994e%26psl.128..231m&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 128, no. 3-4, p. 231-241
Statistics
Applications
73
Chemical Composition, Diamonds, Earth Crust, Earth Mantle, Laser Applications, Oxygen Isotopes, Peridotite, Rocks, Fluorination, Olivine
Scientific paper
The oxygen isotopic composition of 76 samples of olivine in spinel-, garnet- and diamond-facies peridotites, and as syngenetic inclusions within diamond has been determined by laser fluorination (LF). Delta O-18V-SMOW values of olivine are almost invariant, averaging 5.18 +/- 0.28 per mil (2 S.D.) with an overall range of 4.8-5.5 per mil. Coexisting clinopyroxenes display positive delta O-18cpx-olivine fractionations averaging 0.4 per mil that are consistent with isotopic equilibrium at normal mantle temperatures. The bulk compositions of spinel-, garnet- and diamond-facies mantle are similar, with a calculated bulk mantle delta O-18 values of +5.5 per mil. Olivin inclusions in diamonds of Archaean age yield delta O-18 values that are indistinguishable from olivine in post-Archaean mantle and the LF data do not provide evidence for gross spatial or temporal delta O-18 variation in peridotitic mantle. There is no evidence that mantle hydration processes impart distinctive oxygen isotope characteristics, other than a subtle isotopic disequilibrium disturbing pyroxenes relative to olivine.
Lowry David
MacPherson Colin
Mattey David
No associations
LandOfFree
Oxygen isotope composition of mantle peridotite 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 Oxygen isotope composition of mantle peridotite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxygen isotope composition of mantle peridotite will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1328532