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Insizwa Lobe

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Journal Article
Published: 01 April 2004
The Canadian Mineralogist (2004) 42 (2): 303–324.
...R. Grant Cawthorn; F. Johan Kruger Abstract The Insizwa lobe of the Mount Ayliff Intrusion, South Africa, is part of an extensive intrusive body that reaches up to 1 km in thickness, and has a variably developed ultramafic basal facies, with minor Ni–Cu–PGE sulfide mineralization. An interpretation...
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Journal Article
Published: 01 December 2003
South African Journal of Geology (2003) 106 (4): 409–428.
...J.S. Marsh; P. Allen; N. Fenner Abstract Detailed petrographic, modal and geochemical studies on a number of deep boreholes (exceeding 1.2km in some instances) along the southeastern margin of the Insizwa lobe of the Mount Ayliff Complex reveal the existence of a geochemical stratigraphy...
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Journal Article
Journal: Economic Geology
Published: 01 September 2002
Economic Geology (2002) 97 (6): 1293–1306.
... for Noril’sk-Talnakh–type massive Ni-Cu sulfide ores, an idea that is supported by the well-known sulfide occurrence at Waterfall Gorge. Here, we present major-, trace-, and noble-element data for 30 samples of cumulate rocks from a continuous 1,200 m drill core through the Insizwa lobe of the complex, as well...
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REPRESENTATIVE WHOLE-ROCK COMPOSITIONS FROM THE <b>INSIZWA</b> <b>LOBE</b> AND UNDERLYING...
Published: 01 April 2004
TABLE 1. REPRESENTATIVE WHOLE-ROCK COMPOSITIONS FROM THE INSIZWA LOBE AND UNDERLYING WATERFALL GORGE SILL
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REPRESENTATIVE WHOLE-ROCK COMPOSITIONS FROM THE <b>INSIZWA</b> <b>LOBE</b> AND UNDERLYING...
Published: 01 April 2004
TABLE 1. REPRESENTATIVE WHOLE-ROCK COMPOSITIONS FROM THE INSIZWA LOBE AND UNDERLYING WATERFALL GORGE SILL
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REPRESENTATIVE WHOLE-ROCK COMPOSITIONS FROM THE <b>INSIZWA</b> <b>LOBE</b> AND UNDERLYING...
Published: 01 April 2004
TABLE 1. REPRESENTATIVE WHOLE-ROCK COMPOSITIONS FROM THE INSIZWA LOBE AND UNDERLYING WATERFALL GORGE SILL
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REPRESENTATIVE WHOLE-ROCK COMPOSITIONS FROM THE <b>INSIZWA</b> <b>LOBE</b> AND UNDERLYING...
Published: 01 April 2004
TABLE 1. REPRESENTATIVE WHOLE-ROCK COMPOSITIONS FROM THE INSIZWA LOBE AND UNDERLYING WATERFALL GORGE SILL
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OLIVINE COMPOSITIONS FROM THE <b>INSIZWA</b> <b>LOBE</b> AND UNDERLYING WATERFALL GORGE S...
Published: 01 April 2004
TABLE 2. OLIVINE COMPOSITIONS FROM THE INSIZWA LOBE AND UNDERLYING WATERFALL GORGE SILL
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Sketch map of the SE portion of the <b>Insizwa</b> <b>lobe</b> of the Mount Ayliff Comple...
Published: 01 December 2003
Figure 1. Sketch map of the SE portion of the Insizwa lobe of the Mount Ayliff Complex showing the location of the borehole cores discussed in the text as well as the Taylor’s Koppie dyke and the location of the section sampled across this dyke. Dense stipple -Basal Zone; diffuse stipple
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Section through the SSE edge of the <b>Insizwa</b> <b>lobe</b> through Waterfall Gorge an...
Published: 01 December 2003
Figure 2. Section through the SSE edge of the Insizwa lobe through Waterfall Gorge and the collars of boreholes INS96-02 and INS98-09. Stipple - Basal Zone with the lherzolite shown as a dense stipple. Hachured area - Central Zone gabbronorites. Blank -Karoo sedimentary rocks. Note the splitting
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Geological map of the four <b>lobes</b> of the Mount Ayliff Intrusion, <b>Insizwa</b>, To...
Published: 01 April 2004
F ig . 1. Geological map of the four lobes of the Mount Ayliff Intrusion, Insizwa, Tonti, Tabankulu and Ingeli, showing the locations of the defunct Waterfall Gorge copper mine, the borehole (INZ1) documented here and borehole INS96–02 ( Maier et al. 2002 ). Data are taken from various sources
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Photomicrographs of the Waterfall Gorge sill intruded below the <b>Insizwa</b> lob...
Published: 01 April 2004
F ig . 4. Photomicrographs of the Waterfall Gorge sill intruded below the Insizwa lobe. A. Dolerite host to Waterfall Gorge sill, showing ophitic plagioclase in clinopyroxene, and scarce, but large, olivine grains, showing some alteration around the edges. B. Contact of dolerite with fine
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Correlation of geochemically-defined subdivisions between three borehole co...
Published: 01 December 2003
Figure 10. Correlation of geochemically-defined subdivisions between three borehole cores in the Insizwa lobe.
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F ig . 1. Locality map. A. Central area of the Karoo igneous province in so...
Published: 01 September 2002
F ig . 1. Locality map. A. Central area of the Karoo igneous province in southern Africa. B. Mount Ayliff Complex. C. Close-up of the Insizwa lobe.
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Interpretation of the gravity profile from south to north across the Insizw...
Published: 01 April 2004
F ig . 2. Interpretation of the gravity profile from south to north across the Insizwa lobe ( Sander & Cawthorn 1996 ), showing locations of Waterfall Gorge and borehole INZ1. Density contrasts are quoted relative to shale of the Karoo Supergroup. The location of the gravity traverse
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Histogram of initial  87 Sr/ 86 Sr (R o ) values for Karoo basaltic rocks a...
Published: 01 April 2004
F ig . 8. Histogram of initial 87 Sr/ 86 Sr (R o ) values for Karoo basaltic rocks and the Insizwa lobe. Data are from Bristow et al. (1984) , Lightfoot et al. (1984) , Marsh et al. (1997) , Maier et al. (2002) and Table 5.
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F ig . 5. Primitive-mantle–normalized concentrations of Ni, Cu, PGE, and Au...
Published: 01 September 2002
F ig . 5. Primitive-mantle–normalized concentrations of Ni, Cu, PGE, and Au in the different units of the Insizwa lobe, the footwall sill, the Waterfall Gorge and Ndzongiseni sulfides (Waterfall Gorge data from Lightfoot et al., 1984 ), and the Taylor’s Koppie dike (normalization factors from
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Interpretation of the elevation above sea level of the basal contact of the...
Published: 01 April 2004
F ig . 3. Interpretation of the elevation above sea level of the basal contact of the Insizwa lobe ( Sander & Cawthorn 1996 ). Major structural lineaments, L1–L4, are based on air photo and gravity information. L4 contains a dolerite dyke that bulges into a wide lens, the center of which
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Plot of concentration of various geochemical parameters ( Tables 1 ,  2 )  ...
Published: 01 April 2004
F ig . 6. Plot of concentration of various geochemical parameters ( Tables 1 , 2 ) versus height through the Insizwa lobe. In the column on left, the darker shading, denoted LZ, refers to lherzolite, the medium density shading, denoted OG, refers to olivine-rich gabbronorite, and the paler
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Plot of concentration of various geochemical parameters ( Tables 1 ,  2 )  ...
Published: 01 April 2004
F ig . 6. Plot of concentration of various geochemical parameters ( Tables 1 , 2 ) versus height through the Insizwa lobe. In the column on left, the darker shading, denoted LZ, refers to lherzolite, the medium density shading, denoted OG, refers to olivine-rich gabbronorite, and the paler