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

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

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

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

Research output: Contribution to journal › Article › peer-review

Abstract

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 ε_Nd of +7. These features likely resulted from multiple mantle depletion. -from Authors

Original language	English
Pages (from-to)	15,879-15,891
Journal	Journal of Geophysical Research
Volume	95
Issue number	B10
Publication status	Published - Jan 1 1990
Externally published	Yes

ASJC Scopus subject areas

Geophysics
Forestry
Oceanography
Aquatic Science
Ecology
Water Science and Technology
Soil Science
Geochemistry and Petrology
Earth-Surface Processes
Atmospheric Science
Earth and Planetary Sciences (miscellaneous)
Space and Planetary Science
Palaeontology

Cite this

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

abstract = "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",

author = "{Xianyu Xue}, Xue and H. Baadsgaard and Irving, {A. J.} and Scarfe, {C. M.}",

year = "1990",

month = jan,

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language = "English",

volume = "95",

pages = "15,879--15,891",

journal = "Journal of Geophysical Research",

issn = "0148-0227",

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TY - JOUR

T1 - Geochemical and isotopic characteristics of lithospheric mantle beneath West Kettle River, British Columbia

T2 - evidence from ultramafic xenoliths

AU - Xianyu Xue, Xue

AU - Baadsgaard, H.

AU - Irving, A. J.

AU - Scarfe, C. M.

PY - 1990/1/1

Y1 - 1990/1/1

N2 - 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

AB - 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

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ER -

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

Abstract

ASJC Scopus subject areas

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