Contributions to Mineralogy and Petrology

, Volume 59, Issue 1, pp 1–12 | Cite as

Major, minor, and trace element compositions of peridotitic and basaltic komatiites from the precambrian crust of Southern Africa

  • A. Günter Herrmann
  • Douglas P. Blanchard
  • Larry A. Haskin
  • Jeffrey W. Jacobs
  • Doris Knake
  • Randy L. Korotev
  • Joyce C. Brannon
Article

Abstract

Major and trace element compositional data are reported for nine mafic and ultramafic rock samples from the Barberton greenstone belt. Rocks from this province are among the oldest fragments of the Earth's crust (∼3.5 b.y.). The data are consistent with an oceanic crust related origin for these rocks. The high abundances of Ni in these samples make their origin by fractional crystallization of a primitive magma unlikely but are consistent with their generation by partial melting of an upper mantle source. The basaltic samples from the Komati formation can be related by small degrees of partial melting of a primitive upper mantle source to the peridotitic komatiite which probably derived from much more extensive partial melting of a similar source. REE and especially Ni abundances limit the proportion of olivine that is permitted in the residue.

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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • A. Günter Herrmann
    • 1
    • 2
  • Douglas P. Blanchard
    • 3
  • Larry A. Haskin
    • 3
  • Jeffrey W. Jacobs
    • 4
  • Doris Knake
    • 5
  • Randy L. Korotev
    • 6
    • 7
  • Joyce C. Brannon
    • 4
  1. 1.Geochemisches Institut der UniversitätGöttingenFederal Republic of Germany
  2. 2.The Lunar Science InstituteHoustonUSA
  3. 3.NASA Johnson Space CenterHoustonUSA
  4. 4.Lockheed Electronics CorporationHoustonUSA
  5. 5.Seelze/HannoverFederal Republic of Germany
  6. 6.Department of ChemistryUniversity of WisconsinMadison
  7. 7.NASA Johnson Space CenterHoustonUSA

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