Geochemical and isotopic characteristics of lithospheric mantle beneath West Kettle River, British Columbia: evidence from ultramafic xenoliths

Xianyu Xue, H. Baadsgaard, A. J. Irving, C. M. Scarfe

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A group of spinel peridotite xenoliths from West Kettle River, British Columbia, represents essentially undepleted to moderately depleted lithospheric mantle rocks in terms of major and compatible trace elements. Whole rock Sr isotopic composition for most of these xenoliths, and whole rock Sm-Nd isotopic composition and LREE contents for some of them, seem to have been perturbed by near-surface processes. Sr and Nd isotopic results for acid-cleaned clinopyroxenes separated from these spinel peridotites reveal an isotopically mid-ocean ridge basalt (MORB)-like mantle. Seven spinel lherzolites gave Nd model ages of 1.5-3.6 Ga, similar to MORB, and on a Sm-Nd isotope diagram plot close to a reference Nd isochron with an age of 0.7 Ga and an initial εNd of +7. These features likely resulted from multiple mantle depletion. -from Authors

Original languageEnglish
JournalJournal of Geophysical Research B: Solid Earth
Issue numberB10
Publication statusPublished - 1990
Externally publishedYes


ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

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