Fertile iron-rich dunite xenoliths from the Bultfontein kimberlite, South Africa - relationship to other mantle peridotite xenoliths.

J. B. Dawson; R. L. Hervig; J. V. Smith

Fertile iron-rich dunite xenoliths from the Bultfontein kimberlite, South Africa - relationship to other mantle peridotite xenoliths.

J. B. Dawson, R. L. Hervig, J. V. Smith

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

Abstract

Dunite blocks consist of olivine with, in some specimens, minor amounts of magnesian ilmenite, bronzite and phlogopite. Averaged analyses (major elements) are given of several olivines and ilmenites. The olivines have lower Mg/(Mg + Fe) ratios (Fo_84-90) than other mantle peridotites, suggesting that they cannot be the residue after partial melting of parental lherzolite. The chemistry of the dunite minerals closely resembles that of kimberlite megacrysts and it is suggested that the dunites are cumulates. -A.C.B.

Original language	English (US)
Pages (from-to)	303-324
Number of pages	22
Journal	Fortschritte der Mineralogie
Volume	59
Issue number	2
State	Published - Jan 1 1981
Externally published	Yes

ASJC Scopus subject areas

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

Cite this

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title = "Fertile iron-rich dunite xenoliths from the Bultfontein kimberlite, South Africa - relationship to other mantle peridotite xenoliths.",

abstract = "Dunite blocks consist of olivine with, in some specimens, minor amounts of magnesian ilmenite, bronzite and phlogopite. Averaged analyses (major elements) are given of several olivines and ilmenites. The olivines have lower Mg/(Mg + Fe) ratios (Fo84-90) than other mantle peridotites, suggesting that they cannot be the residue after partial melting of parental lherzolite. The chemistry of the dunite minerals closely resembles that of kimberlite megacrysts and it is suggested that the dunites are cumulates. -A.C.B.",

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AU - Hervig, R. L.

AU - Smith, J. V.

PY - 1981/1/1

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N2 - Dunite blocks consist of olivine with, in some specimens, minor amounts of magnesian ilmenite, bronzite and phlogopite. Averaged analyses (major elements) are given of several olivines and ilmenites. The olivines have lower Mg/(Mg + Fe) ratios (Fo84-90) than other mantle peridotites, suggesting that they cannot be the residue after partial melting of parental lherzolite. The chemistry of the dunite minerals closely resembles that of kimberlite megacrysts and it is suggested that the dunites are cumulates. -A.C.B.

AB - Dunite blocks consist of olivine with, in some specimens, minor amounts of magnesian ilmenite, bronzite and phlogopite. Averaged analyses (major elements) are given of several olivines and ilmenites. The olivines have lower Mg/(Mg + Fe) ratios (Fo84-90) than other mantle peridotites, suggesting that they cannot be the residue after partial melting of parental lherzolite. The chemistry of the dunite minerals closely resembles that of kimberlite megacrysts and it is suggested that the dunites are cumulates. -A.C.B.

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Fertile iron-rich dunite xenoliths from the Bultfontein kimberlite, South Africa - relationship to other mantle peridotite xenoliths.

Abstract

ASJC Scopus subject areas

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