Peridotite nodules from the Ngopetsoeu and Lipelaneng kimberlites, Lesotho: a crustal or mantle origin.

D. A. Carswell; W. L. Griffin; P. Kresten

Peridotite nodules from the Ngopetsoeu and Lipelaneng kimberlites, Lesotho: a crustal or mantle origin.

D. A. Carswell, W. L. Griffin, P. Kresten

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

Abstract

Variations in whole-rock and mineral chemistries allow the recognition of four distinct groups of peridotite nodules within these kimberlite occurrences. Equilibration T estimates, together with general geochemical considerations, strongly suggest that the relatively ferriferous Group 1 (Cr-spinel wehrlites and lherzolites) and Group 2 (Al-spinel lherzolites) nodules represent basaltic cumulates of probable lower crustal origin. By contrast, the more magnesian peridotites are considered to have derived from the upper mantle, with the Group 3 nodules (Cr-spinel lherzolites and harzburgites) originating from shallower levels than those of Group 4 (garnet harzburgites).-J.M.H.

Original language	English
Pages (from-to)	229-243
Number of pages	15
Journal	American Society of Mechanical Engineers (Paper)
Publication status	Published - 1984
Externally published	Yes

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title = "Peridotite nodules from the Ngopetsoeu and Lipelaneng kimberlites, Lesotho: a crustal or mantle origin.",

abstract = "Variations in whole-rock and mineral chemistries allow the recognition of four distinct groups of peridotite nodules within these kimberlite occurrences. Equilibration T estimates, together with general geochemical considerations, strongly suggest that the relatively ferriferous Group 1 (Cr-spinel wehrlites and lherzolites) and Group 2 (Al-spinel lherzolites) nodules represent basaltic cumulates of probable lower crustal origin. By contrast, the more magnesian peridotites are considered to have derived from the upper mantle, with the Group 3 nodules (Cr-spinel lherzolites and harzburgites) originating from shallower levels than those of Group 4 (garnet harzburgites).-J.M.H.",

author = "Carswell, {D. A.} and Griffin, {W. L.} and P. Kresten",

year = "1984",

language = "English",

pages = "229--243",

journal = "American Society of Mechanical Engineers (Paper)",

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T1 - Peridotite nodules from the Ngopetsoeu and Lipelaneng kimberlites, Lesotho

T2 - a crustal or mantle origin.

AU - Carswell, D. A.

AU - Griffin, W. L.

AU - Kresten, P.

PY - 1984

Y1 - 1984

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AB - Variations in whole-rock and mineral chemistries allow the recognition of four distinct groups of peridotite nodules within these kimberlite occurrences. Equilibration T estimates, together with general geochemical considerations, strongly suggest that the relatively ferriferous Group 1 (Cr-spinel wehrlites and lherzolites) and Group 2 (Al-spinel lherzolites) nodules represent basaltic cumulates of probable lower crustal origin. By contrast, the more magnesian peridotites are considered to have derived from the upper mantle, with the Group 3 nodules (Cr-spinel lherzolites and harzburgites) originating from shallower levels than those of Group 4 (garnet harzburgites).-J.M.H.

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M3 - Article

AN - SCOPUS:0021369987

SN - 0402-1215

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JO - American Society of Mechanical Engineers (Paper)

JF - American Society of Mechanical Engineers (Paper)

ER -

Peridotite nodules from the Ngopetsoeu and Lipelaneng kimberlites, Lesotho: a crustal or mantle origin.

Abstract

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