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Petrogenesis of the syntectonic Matok Pluton in the Limpopo Belt (South Africa) and its implications of the geodynamic environment
(Stellenbosch : Stellenbosch University, 2011-12)
ENGLISH ABSTRACT: The ~2.67 Ga Matok pluton comprises calc‐alkaline pyroxene (px)‐bearing and px‐free granitoids. The pluton was constructed by means of two episodes of intrusion each of which had co‐magmatic px‐bearing ...
Fluid and deformation induced partial melting and melt escape in low-temperature granulite-facies metasediments, Damara Belt, Namibia.
(Stellenbosch : University of Stellenbosch, 2009-03)
Fluid-present partial melting has generally been regarded a poor candidate for effecting crustal
differentiation. In this study I report on anatectic metasediments from the Pan-African Damara
Belt in Namibia that have ...
The mid-crustal architecture of a continental arc - a transect through the South Central Zone of the Pan-African Damara Belt, Namibia
(Stellenbosch : University of Stellenbosch, 2010-03)
ENGLISH ABSTRACT: The NE-trending South Central Zone of the Pan-African (ca. 550-500) Damara orogen in central
Namibia exposes deeply eroded mid-crustal rocks, thought to represent the magmatic arc of the
Damara orogen. ...
Geology and emplacement controls of the Stinkbank granite in the south Central Zone of the Pan-African Damara Belt, Namibia
(Stellenbosch : University of Stellenbosch, 2010-03)
ENGLISH SUMMARY: Regional mapping of the Stinkbank granite in the south Central Zone of the Damara Belt, focused on an area of ca. 150 km2 in the SW parts of the granite along well exposed sections of the Khan River to the ...
An experimental investigation on the fate of xenocrystic garnet in kimberlitic melts under upper mantle conditions
(Stellenbosch : Stellenbosch University, 2015-04)
ENGLISH ABSTRACT: Insets of large anhedral minerals in kimberlites are proposed to mainly have their origin from the disaggregation of mantle-derived xenoliths through mechanical abrasion by the ascending kimberlite magma. ...
The petrogenesis of the Nelshoogte pluton: The youngest and most compositionally variable TTG pluton in the Barberton Granite-Greenstone Terrain
(Stellenbosch : Stellenbosch University, 2014-04)
ENGLISH ABSTRACT: The compositions of tonalite-trondhjemite-granodiorite (TTG)-series rocks from the
Barberton Granite-Greenstone Terrain (BGGT) of Southern Africa vary in terms of major
element concentrations ...
Orthopyroxene stability within Kimberlite magma : an experimental investigation
(Stellenbosch : Stellenbosch University, 2012-03)
ENGLISH ABSTRACT: The common presence of large volumes of coarse-grained olivine in kimberlite magmas has been proposed to attest to the volume of mantle xenolith material that has been disaggregated during the ascent of ...
Pyroxene stability within kimberlite magma in the upper mantle : an experimental investigation
(Stellenbosch : Stellenbosch University, 2015-04)
ENGLISH ABSTRACT: Entrainment and assimilation of xenolithic material during kimberlite ascent is considered to be important in shaping the chemistry of the magma and fuelling magma ascent by driving CO2 exsolution. Previous, ...
Experimental evidence for sulphide magma percolation and evolution : relevant to the chromite bearing reefs of the Bushveld Complex
(Stellenbosch : Stellenbosch University, 2012-03)
ENGLISH ABSTRACT: Pt mineralization within the Bushveld Complex is strikingly focused on the chromitite reefs, despite these horizons being associated with low volumes of base metal sulphide relative to Pt grade. Partitioning ...
Phase relations and Pt solubility in sulphide melt in the FE-NI-CU-S system at 1 ATM : implications for evulution of sulphide magma in the Merensky reef, Bushveld Complex, South Africa
(Stellenbosch : Stellenbosch University, 2013-03)
ENGLISH ABSTRACT: It is widely accepted that sulphide is the carrier and concentrator of PGEs during magmatic mineralization episodes in the Merensky Reef (MR). PGE concentration peaks and sulphide volume percent peaks are ...