Geochemistry and petrogenesis of the Tsirub nephelinite-basanite intrusions, Aus, southern Namibia

Master Thesis

2007

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http://hdl.handle.net/11427/4214
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thesis_sci_2007_nakashole_a.pdf (8.12 MB)
Authors
Nakashole, Albertina
Supervisors
Reid, Dave
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University of Cape Town

Department
Department of Geological Sciences
Faculty
Faculty of Science
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Abstract
Nephelinite-basanite intrusions found on the Tsurib farm near Aus in southern Namibia are described for the first time. The petrography is very similar to each other wih texture ranging from porphyritic to microporphyritic where olivine is dominant, and sometimes the only, phenocryst/microphenochryst phase, and less commonly clinopyroxen; the groundmass consists of clinopyroxine, olivine, Fe-Ti oxides and secondary generation amphibole. Rare felsic xenoliths comprising alkali feldspar (orthoclase) and clinopyroxene (diopside and aegerine-augite) occur in the two major intrusive bodies.
Description

Includes abstract.


Includes bibliographical references (leaves 88-102).

Keywords
Geological Sciences

Reference:

Nakashole, A. 2007. Geochemistry and petrogenesis of the Tsirub nephelinite-basanite intrusions, Aus, southern Namibia. University of Cape Town.

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