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Mooidraai Formation

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Journal Article
Published: 01 December 2014
South African Journal of Geology (2014) 117 (2): 173–192.
...M. KUNZMANN; J. GUTZMER; N.J. BEUKES; G.P. HALVERSON Abstract The Paleoproterozoic Mooidraai Formation is an up to 220 m thick succession of marine carbonate rocks that caps the Fe- and Mn-bearing Hotazel Formation in the Kalahari Manganese Field, South Africa. Although it occupies an important...
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Lithostratigraphy of the <span class="search-highlight">Mooidraai</span> <span class="search-highlight">Formation</span> in a north-south transect. Hei...
Published: 01 December 2014
Figure 7 Lithostratigraphy of the Mooidraai Formation in a north-south transect. Height is given in meters (drill core depth, except for U17). The lower Mooidraai Formation is dominated by deep water facies, while the upper part is nearly invariably composed of shallow marine carbonates arranged
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Schematic facies model of the <span class="search-highlight">Mooidraai</span> <span class="search-highlight">Formation</span>. Note that this sketch do...
Published: 01 December 2014
Figure 6 Schematic facies model of the Mooidraai Formation. Note that this sketch does not necessarily reflects the real geometry of the basin as rapid early subsidence in the lowermost Mooidraai Formation and strong lateral thickness and facies changes suggest deposition in a basin
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Lithostratigraphy of the <span class="search-highlight">Mooidraai</span> <span class="search-highlight">Formation</span> in a west-east transect. See  ...
Published: 01 December 2014
Figure 8 Lithostratigraphy of the Mooidraai Formation in a west-east transect. See Figure 1 for location of drill holes and Figure 6 for legend. (For interpretation of the references to color in this figure, the reader is referred to the web version of this article.)
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Generalized stratigraphy of the <span class="search-highlight">Mooidraai</span> <span class="search-highlight">Formation</span>. The lower part reflect...
Published: 01 December 2014
Figure 9 Generalized stratigraphy of the Mooidraai Formation. The lower part reflects relative sea level rise and a transition from lagoonal/tidal flat to foreslope environments. After a gradual transition to subtidal/lagoonal conditions, a prograding platform was established, dominated
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Traditional type profile of the Hotazel and <span class="search-highlight">Mooidraai</span> <span class="search-highlight">formations</span> 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
Journal Article
Published: 01 June 2006
South African Journal of Geology (2006) 109 (1-2): 81–86.
...Michael Bau; Brian Alexander Abstract Comparison of shallow-water limestone and silicified dolomite from the Mid-Paleoproterozoic Mooidraai Formation, Transvaal Supergroup, South Africa, shows that the primary rare earth element (REE) distribution of these pure marine sedimentary carbonates has...
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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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Major element and stable isotope characteristics of limestone and dolomite ...
Published: 01 June 2006
Figure 2. Major element and stable isotope characteristics of limestone and dolomite of the Mooidraai Formation, Transvaal Supergroup, South Africa (data from Tsikos et al. , 2001 , and Bau et al. , 1999 ). Note that the Mooidraai carbonates do not show anomalously positive δ 13 C values
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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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Locality map of the Kalahari Manganese Field showing three of the five eros...
Published: 01 December 2014
Figure 1 Locality map of the Kalahari Manganese Field showing three of the five erosinally preserved remnants of the Mn-bearing Hotazel Formation, location of Mn mines, extent of the Mooidraai Formation within the Kalahari deposit, important structural features, approximate location of paleohighs
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( A ) Plot of δ 13 C carb  versus TIC for all samples; ( B ) Sr concentrati...
Published: 01 June 2006
Figure 7. ( A ) Plot of δ 13 C carb versus TIC for all samples; ( B ) Sr concentration vs. 87 Sr/ 86 Sr ratio for all samples. ( C ) δ 13 C carb vs. 87 Sr/ 86 Sr ratio for samples of the Hotazel Formation; ( D ) δ 18 O carb vs. 87 Sr/ 86 Sr ratio for samples of the Mooidraai Formation.
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Hand specimen photographs of polished drill core pieces of selected litholo...
Published: 01 June 2006
Figure 3. Hand specimen photographs of polished drill core pieces of selected lithologies from drill core REX44. ( A ) Finely microbiolaminated limestone/dolostone of the Mooidraai Formation (REX44-5); ( B ) Siderite lutite with convoluted bedding (REX44-10); ( C ) Microbanded braunite lutite
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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Plot of δ 13 C vs. δ 18 O for the carbonate unit in the MOM4 drill core (al...
Published: 01 March 2019
that, with the exception of the Mooidraai Formation, δ 18 O values all all carbonate rocks have a similar range.
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Hand specimen and thin section photographs of intraclast breccia, smoothly ...
Published: 01 December 2014
of hematite-altered microbialaminite from the basal Mooidraai Formation. ( I ) Strong dolomitized alternation of microbialaminite and massive dolarenite. (For interpretation of the references to color in this figure, the reader is referred to the web version of this article.)
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Simplified stratigraphic position of the <span class="search-highlight">Mooidraai</span> and Hotazel <span class="search-highlight">formations</span> o...
Published: 01 June 2006
Figure 1. Simplified stratigraphic position of the Mooidraai and Hotazel formations of the Transvaal Supergroup, South Africa.
Journal Article
Published: 01 March 2019
South African Journal of Geology (2019) 122 (1): 39–56.
... that, with the exception of the Mooidraai Formation, δ 18 O values all all carbonate rocks have a similar range. ...
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Journal Article
Journal: Geology
Published: 28 October 2019
Geology (2020) 48 (1): 44–48.
... of the Maremane Dome, unconformably overlies carbonates of the Mooidraai Formation, which is estimated to be ca. 2.39 Ga ( Bau et al., 1999 ). Hence, the unconformity and weathering profiles were thought to have formed between 2.39 and 1.91 Ga, shortly after the start of the Great Oxidation Event (2.45–2.32 Ga...
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Journal Article
Published: 01 June 2018
South African Journal of Geology (2018) 121 (2): 157–170.
... and limestones of the Mooidraai Formation ( Figure 1B ). Together, the Ongeluk, Hotazel and Mooidraai Formations make up the early Paleoproterozoic ( Cornell et al., 1996 ; Bau et al., 1999 ; Fairey et al., 2013 ) Voëlwater Subgroup of the Postmasburg Group of the Transvaal Supergroup. The Mooidraai Formation...
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