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Deep-Seated Inclusions in Kimberlites and the Problem of the Composition of the Upper Mantle

Deep-Seated Inclusions in Kimberlites and the Problem of the Composition of the Upper Mantle

N. V. Sobolev (Editor), David A. Brown (Translated by), F. R. Boyd (Editor)

ISBN: 978-1-118-66484-1

Mar 2013, American Geophysical Union

279 pages

Select type: O-Book

Description

Published by the American Geophysical Union as part of the Special Publications Series.

Almost immediately after the discovery of kimberlites, the attention of investigators was attracted to their unusual mineralogy. It has been established that, besides the fragments caught up from various crustal rocks, xenoliths of unusual types occur in the kimberlites, believed by most investigators to have been brought up from great depths. The interest in these xenoliths increased even further following the first discovery of a diamond?]bearing eclogite in 1897, the study of which led to the hypothesis of an eclogite layer in the Earth.

An early survey of the mineralogy and petrography of the deep?]seated xenoliths has been brought together in the authoritative monograph of Williams (1932).

Preface vii

Chapter I Methods of Investigation 1

Chapter II Brief Description of Kimberlite Pipes Investigated 11

Chapter III The Facies of Pyrope Peridotites and Eclogites With Graphite 16

Chapter IV The Facies of Diamond-Bearing Eclogites and Peridotites 83

Chapter V Mineral Data 154

Chapter VI Distribution Patterns of Components in Minerals of Variable Composition 217

Chapter VII The Problems of the Composition of the Upper Mantle 234

Chapter VIII The Mineralogical Criteria of the Diamond-Bearing Kimberlites 247

Conclusions 257

Bibliography 260