REOS, SMND, AND RBSR ISOTOPE EVIDENCE FOR THICK ARCHAEAN LITHOSPHERIC MANTLE BENEATH THE SIBERIAN CRATON MODIFIED BY MULTISTAGE METASOMATISM

REOS, SMND, AND RBSR ISOTOPE EVIDENCE FOR THICK ARCHAEAN LITHOSPHERIC MANTLE BENEATH THE SIBERIAN CRATON MODIFIED BY MULTISTAGE METASOMATISM

Pearson D.G.; Shirey S.B.; Carlson R.W.; Boyd F.R.; Pokhilenko N.P.; Shimizu N.
xmlui.dri2xhtml.METS-1.0.item-citation: Geochimica et Cosmochimica Acta, 1995, , 5, 959-977
Date: 1995

Abstract:

A suite of peridotite xenoliths from kimberlites intruding the Siberian craton indicate the presence of lithospheric mantle over 150 km thick at 350 Ma. We report Sr-Nd isotope data for minerals from the peridotite xenoliths together with osmium isotopic compositions for whole-rocks and two olivine separates. Additionally, the osmium isotopic composition of a carbonatite from Fort Portal, Uganda, has been measured in order to evaluate the effect of carbonatite metasomatism on mantle Re-Os systematics.

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