Geochemistry of granitic and associated rocks in the Kaapvaal craton
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Geochemistry of granitic and associated rocks in the Kaapvaal craton by D. R. Hunter

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Published by University of the Witwatersrand in Johannesburg .
Written in English

Subjects:

Places:

  • South Africa,
  • Transvaal.

Subjects:

  • Granite -- South Africa -- Transvaal.,
  • Geochemistry.

Book details:

Edition Notes

Bibliography: leaves 15-17 (1st group).

Statementby D. R. Hunter.
SeriesUniversity of the Witwatersrand, Johannesburg. Economic Geology Research Unit. Information circular, no. 81, Information circular (University of the Witwatersrand. Economic Geology Research Unit) ;, no. 81.
Classifications
LC ClassificationsQE325 .J6 no. 81, QE462.G7 .J6 no. 81
The Physical Object
Pagination19, [50] l.
Number of Pages50
ID Numbers
Open LibraryOL5079830M
LC Control Number74150705

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Archean granitic rocks from the Barberton region in South Africa fall into several geochemical groups. Tonalite diapirs (∼ b.y.) are characterized by low LIL-element contents and element ratios (K 2 O/Na 2 O, Rb/Sr, Ba/Sr). Dalmein-type plutons (– b.y.) are composed principally of granodiorite and the Lochiel batholith (∼ b.y.) of quartz by:   Mafic Dikes of NE Kaapvaal craton, geochemistry and cross cutting relationship ages. Swarms in the dikes may be further defined as the large geological feature that consists of major groups of linear and parallel dikes creates an overlying intrusion within the continental crust with a . Earth’s Oldest Rocks, Second Edition, is the only single reference source for geological research of early Earth. This new edition is an up-to-date collection of scientific articles on all aspects of the early history of the Earth, from planetary accretion at billion years ago (Ga), to the onset of modern-style plate tectonics at Ga.   Abstract. The eastern part of the Kaapvaal Craton represents a classical granitoid-greenstone terrain and contains the oldest rocks of the African continent, exhibiting about Ma of crustal evolution from to by: 1.

A Geochemical Classification for Granitic Rocks Article (PDF Available) in Journal of Petrology 42(11) November with 5, Reads How we measure 'reads'. 4 ultramafic and mafic intrusions of the kaapvaal craton C.R. Anhaeusser Economic Geology Research Institute, School of Geosciences, University of the Witwatersrand, Johannesburg.   The low-MgO high Ti-Zr basalt geochemistry is consistent with evolution from a picritic parent with about a 30–44 wt. % mantle lithospheric component. In contrast, the low Ti-Zr basalt group parental composition is outside the compositional range suggested for the high Ti-Zr picrite endmembers, being more depleted in incompatible elements (e Cited by: The Eastern Pilbara Craton is the eastern portion of the Pilbara Craton located in Western region contains variably metamorphosed mafic and ultramafic greenstone belt rocks, intrusive granitic dome structures, and volcanic sedimentary rocks. These greenstone belts worldwide are thought to be the remnants of ancient volcanic belts, and are subject to much debate in today's.

@article{osti_, title = {Geochemistry and mineralogy of sediments from the Ventersdorp and Transvaal supergroups, South Africa: Cratonic evolution during the early proterozoic}, author = {Wronkiewicz, D J and Condie, K C}, abstractNote = {Approximately pelite and 12 quartzite samples from the Ventersdorp ({approx} Ga) and Transvaal Supergroups ({approx} Ga) have been.   Bolhar R, Hofmann A, Siahi M et al () A trace element and Pb isotopic investigation into the provenance and deposition of stromatolitic carbonates, ironstones and associated shales of the ~ Ga Pongola Supergroup, Kaapvaal by: 3. Chapter-$ REE Geochemistry of Granitic Rocks Introduction Rare earth elements all have very similar chemical and physical properties. This arises from the fact that they all form stable 3' ions of similar size. Small differences in chemical. The oldest rocks so far recognized are located in the Swaziland-Barberton regions on the eastern side of the Kaapvaal Craton, where ages more than Ma have been recorded. The early stages of shield development are also best exposed in the Barberton Mountains, where it is now apparent that continent formation took place by magmatic.