Megacrysts from the Monastery Kimberlite Pipe, South Africa

  1. F.R. Boyd and
  2. Henry O.A. Meyer
  1. J.J. Gurney1,
  2. W.R.O. Jakob2 and
  3. J.B. Dawson3

Published Online: 19 MAR 2013

DOI: 10.1029/SP016p0227

The Mantle Sample: Inclusion in Kimberlites and Other Volcanics

The Mantle Sample: Inclusion in Kimberlites and Other Volcanics

How to Cite

Gurney, J.J., Jakob, W.R.O. and Dawson, J.B. (1979) Megacrysts from the Monastery Kimberlite Pipe, South Africa, in The Mantle Sample: Inclusion in Kimberlites and Other Volcanics (eds F.R. Boyd and H. O.A. Meyer), American Geophysical Union, Washington, D.C.. doi: 10.1029/SP016p0227

Author Information

  1. 1

    Department of Geochemistry, University of Cape Town, Private Bag, Rondebosch, 7700, South Africa

  2. 2

    Atomic Energy Board, Pelindaba, Pretoria, South Africa

  3. 3

    Department of Geology, St. Andrews University, Scotland

Publication History

  1. Published Online: 19 MAR 2013
  2. Published Print: 1 JAN 1979

ISBN Information

Print ISBN: 9780875902135

Online ISBN: 9781118664858

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Keywords:

  • Clinopyroxene;
  • Megacrysts;
  • Mineral abundances;
  • Monastery kimberlite intrusion;
  • Olivine;
  • Orthopyroxene

Summary

Megacrysts of garnet, clinopyroxene, orthopyroxene, olivine and ilmenite from the Monastery Mine show systematic variations in chemistry over a wide range of compositions. These are interpreted to be due to igneous fractionation processes, taking place over a wide range of declining temperature at essentially constant pressure in a magma body of limited extent.