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Hotazel

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Journal Article
Published: 01 March 2020
South African Journal of Geology (2020) 123 (1): 1–18.
... is developed on a so-called “bostonite” sill that intruded the Hotazel Formation (Postmasburg Group) in the Avontuur deposit. It represents a saprolitized diabase that can be correlated to the Wolhaarkop ( Holland and Beukes, 1990 ) and Drakenstein ( Wiggering and Beukes, 1990 ) paleoweathering profiles, where...
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Journal Article
Journal: Economic Geology
Published: 01 November 2003
Economic Geology (2003) 98 (7): 1449–1462.
...Harilaos Tsikos; Nicolas J. Beukes; John M. Moore; Chris Harris Abstract The Kalahari manganese field in the Northern Cape province, South Africa, is a world-class manganese resource (ca. 8 billion tons at 20–48% Mn). It occurs within the Hotazel Formation in the uppermost Paleoproterozoic (2.65...
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Journal Article
Journal: Economic Geology
Published: 01 February 1997
Economic Geology (1997) 92 (1): 87–97.
...Harilaos Tsikos; John M. Moore Abstract New data are presented concerning the petrography and geochemistry of the Paleoproterozoic Hotazel iron-formation of the Kalahari manganese field, South Africa. Mineralogically and texturally, the Hotazel iron-formation is very similar to Paleoproterozoic...
Journal Article
Journal: Economic Geology
Published: 01 May 1987
Economic Geology (1987) 82 (3): 706–718.
...Takashi Miyano; Nicolas J. Beukes Abstract Physicochemical environments for the formation of quartz-free manganese oxide ores from the Hotazel Formation of the Kalahari manganese field, northern Cape Province, South Africa, are discussed quantitatively on the basis of the phase relations...
Journal Article
Published: 01 December 1986
South African Journal of Geology (1986) 89 (3): 421–425.
Journal Article
Published: 01 September 1984
South African Journal of Geology (1984) 87 (3): 257–272.
Journal Article
Journal: Economic Geology
Published: 01 April 1969
Economic Geology (1969) 64 (2): 221–223.
Image
Traditional type profile of the <span class="search-highlight">Hotazel</span> and Mooidraai formations showing th...
Published: 01 December 2014
Figure 2 Traditional type profile of the Hotazel and Mooidraai formations showing the stratigraphic position and mineralogical composition of three symmetrical Fe and Mn cycles of the Hotazel Formation. The Mooidraai Formation conformably overlies the Hotazel Formation and shows a general
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F ig . 2. Schematic stratigraphic logs of the <span class="search-highlight">Hotazel</span>
      Formation, show...
Published: 01 November 2003
F ig . 2. Schematic stratigraphic logs of the Hotazel Formation, showing sample locations on true vertical scale, depths of intersection of the Hotazel Formation, and mine areas proximal to the drill cores used in this paper. Lateral correlation across the cores is based
Journal Article
Published: 01 June 2019
South African Journal of Geology (2019) 122 (2): 237–248.
...N.A. Vafeas; L.C. Blignaut; K.S. Viljoen; P. Le Roux Abstract The Paleoproterozoic Kalahari Manganese Field is the largest known land-based manganese (Mn) deposit on Earth and comprises five erosional relics of the iron- and manganese-rich Hotazel Formation. A total of 19 manganese ore samples from...
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Stratigraphy of drill hole W270 north of <span class="search-highlight">Hotazel</span>, South Africa, showing sam...
Published: 28 October 2019
Figure 3. Stratigraphy of drill hole W270 north of Hotazel, South Africa, showing sample sites and cumulative probability plots (with histograms) for zircon grains analyzed from five intervals: (A) quartz arenite (184.1 m); (B) interbedded red and green fine-grained sandstone (202.1 m and 205.9 m
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Conceptual two-stage model for the deposition of the Voëlwater Subgroup, i...
Published: 01 June 2006
the Mooidraai carbonate platform. ( A ) Facies distribution model for the Hotazel Formation; ( B ) Facies distribution model for the Mooidraai Formation in relation to the Hotazel Formation.
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Spectrum of pink diaspore, AlO(OH), from <span class="search-highlight">Hotazel</span>, S.W. Africa plotted as 1....
Published: 01 January 2014
Figure 11 Spectrum of pink diaspore, AlO(OH), from Hotazel, S.W. Africa plotted as 1.0 mm thick. Its pink color of diaspore is due to Mn 3+ substituting for Al.
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Simplified stratigraphic position of the Mooidraai and <span class="search-highlight">Hotazel</span> formations o...
Published: 01 June 2006
Figure 1. Simplified stratigraphic position of the Mooidraai and Hotazel formations of the Transvaal Supergroup, South Africa.
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(A) Structural map of the Kalahari Manganese Field illustrating the distrib...
Published: 30 January 2018
Fig. 1. (A) Structural map of the Kalahari Manganese Field illustrating the distribution of manganese mines currently mining the Hotazel Formation as well as the major structural features in the area (after Kleyenstüber 1984 , Cairncross & Beukes 2013 , Vafeas 2016 ). (B) The general
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F ig . 5. A δ-δ oxygen isotope plot for quartz-magnetite pairs
of <span class="search-highlight">Hotazel</span> i...
Published: 01 November 2003
F ig . 5. A δ-δ oxygen isotope plot for quartz-magnetite pairs of Hotazel iron formation compared with respective compositional fields of similar iron formation occurrences from Western Australia (Brockman iron formation; Becker and Clayton, 1976 ) and South Africa (Kuruman iron formation; Perry
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Shale-normalized REY patterns of limestones and silicified dolomites from t...
Published: 01 June 2006
Figure 3. Shale-normalized REY patterns of limestones and silicified dolomites from the Mooidraai Formation and of a sample of manganese formation (braunite lutite; M. Bau, unpubl. data) from the underlying Hotazel Formation. The parallel patterns of the carbonates demonstrate that the primary
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(A) Southern part of the African continent. Black circle denotes location o...
Published: 01 March 2012
denotes Hotazel. Image source: Google Earth. (B) Close-up image of the Hotazel–Wonderwerk Cave area. White dots indicate locations and names of samples for sand grain-size distribution. The word “Sand” was omitted from the name of each sample to avoid overcrowding of the figure. The southern boundary
Journal Article
Published: 01 June 2006
South African Journal of Geology (2006) 109 (1-2): 63–80.
... the Mooidraai carbonate platform. ( A ) Facies distribution model for the Hotazel Formation; ( B ) Facies distribution model for the Mooidraai Formation in relation to the Hotazel Formation. ...
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Geophysical interpretation of the Mukulu area, indicating the position of t...
Published: 01 June 2019
Figure 2. Geophysical interpretation of the Mukulu area, indicating the position of the major Blackridge thrust fault, as well as secondary thrusted, normal fault-bound packages of Hotazel Formation ( Vafeas et al., 2018b ).