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Kuruman Iron Formation

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Journal Article
Journal: Geology
Published: 01 March 2015
Geology (2015) 43 (3): 251–254.
... separate impacts. Here we report geochemical evidence of extraterrestrial material in the only one of these spherule layers where it has not been previously reported, the Kuruman spherule layer (KSL) in the Kuruman Iron Formation, a banded iron formation (BIF) in the Griqualand West Basin (South Africa...
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Examples of <span class="search-highlight">iron</span> <span class="search-highlight">formation</span> and deepwater chert in the Campbellrand-<span class="search-highlight">Kuruman</span> ...
Published: 01 January 2009
Figure 5. Examples of iron formation and deepwater chert in the Campbellrand-Kuruman Complex. (A) Typical banded iron formation in core. Siderite-magnetite-chert with rare iron silicate–rich laminations. Quarter core is ~2.5 cm wide. (B) Kuruman Iron Formation in outcrop. (C, D) Uncommon hematite
Journal Article
Journal: Economic Geology
Published: 01 November 1989
Economic Geology (1989) 84 (7): 1733–1774.
...Cornelis Klein; Nicolas J. Beukes Abstract This study deals with the geochemistry and sedimentology of a facies transition from interbedded carbonate-shale to banded iron-formation in the Campbellrand carbonate sequence to the overlying Kuruman Iron Formation of the Transvaal Supergroup in South...
Journal Article
Journal: Economic Geology
Published: 01 March 2000
Economic Geology (2000) 95 (2): 405–427.
... with a range of values for other Proterozoic iron-formations of South Africa (Kuruman iron-formation sequence). It is the purpose of this study to present a comprehensive set of detailed analytical data for some of the best preserved Early Proterozoic iron-formations of the Quadrilátero Ferrífero...
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Journal Article
Journal: GSA Bulletin
Published: 01 May 2015
GSA Bulletin (2015) 127 (5-6): 850–861.
..., or if it is the result of later-stage circulation of oxidizing fluids through the sediment pile. In this study, we conducted high-resolution microscopic investigations on BIF from the 2728 Ma Abitibi greenstone belt located in the Superior Province of the Canadian Shield and the 2460 Ma Kuruman Iron Formation in South...
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Series: GSA Memoirs
Published: 01 January 1983
DOI: 10.1130/MEM161-p253
... Iron Formation (Precambrian X) suggests that hypothesis 2 is more likely. A detailed study of this diamictite and its stratigraphic relation to the iron formation, however, is required to confirm this observation. A Late Archean (Precambrian W) iron formation (Weld Range, Western Australia) is strongly...
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F ig . 5. A δ-δ oxygen isotope plot for quartz-magnetite pairs
of Hotazel 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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Lithostratigraphy of cores GKP01, GKF01, and BH1-Sacha. Nomenclature of str...
Published: 01 January 2009
, followed by the deposition of Permian tillites of the Karoo Supergroup. In GKP01 and GKF01 the lower Kuruman Iron Formation is still preserved; however, in BH1-Sacha the entire Kuruman Iron Formation was excised, and the young tillites rest directly on the top of the Campbellrand Subgroup. Included
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Map showing sampling locations <span class="search-highlight">Kuruman</span> and Alphen farm. The Gamohaan <span class="search-highlight">Format</span>...
Published: 01 July 2014
). The Gamohaan Formation is directly overlain by the Kuruman Iron Formation (after Sumner, 1997a ).
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Binary plots of (A) SiO 2  against Fe 2 O 3 ; (B) Al 2 O 3  against Fe 2 O ...
Published: 01 January 2013
(1992) ; data for Kuruman iron formation from Gutzmer et al. (2008) .
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Geologic context of sampling locations. A: Simplified geologic map of Griqu...
Published: 01 December 2016
location of Kaapvaal craton and Neoarchean Griqualand West Basin. B: Simplified stratigraphic column of Gamohaan Formation showing increasing basin water depth during deposition and position of fossiliferous chert unit (adapted from Beukes and Gutzmer, 2008 ). Kogel.—Kogelbeen; KIF—Kuruman Iron Formation
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Total <span class="search-highlight">iron</span> (Fe T ) plotted against P 2 O 5  concentration (wt%) for red, ir...
Published: 05 February 2021
Figure 2. Total iron (Fe T ) plotted against P 2 O 5 concentration (wt%) for red, iron oxide–bearing hydrothermal sediments from Deep Sea Drilling Project Site 598 on the East Pacific Rise (A), ca. 2.48 Ga Brockman Iron Formation of Western Australia (B), ca. 2.46 Ga Kuruman Iron Formation
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Optic microscopic (OM) images of microbands under transmitted light (TL) fr...
Published: 01 May 2015
Figure 3. Optic microscopic (OM) images of microbands under transmitted light (TL) from the Kuruman Iron Formation: (A) overview of a thin section, (B) alternating silica- and iron-rich microbands, (C) microbands of carbonates (Crb), chert (Ch), and magnetite (Mt), (D) stilpnomelane (Stp
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Correlation between Al 2 O 3  and organic carbon content (in wt%) for five ...
Published: 01 October 2005
F igure 23. Correlation between Al 2 O 3 and organic carbon content (in wt%) for five different lithologies in the transition from limestone to iron-formation (from the Campbellrand carbonate sequence to the overlying Kuruman Iron Formation of the Transvaal Supergroup) from Klein and Beukes
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Transmission electron microscopic (TEM) images and selected area electron d...
Published: 01 May 2015
Figure 6. Transmission electron microscopic (TEM) images and selected area electron diffraction (SAED) patterns of hematite from iron-oxide bands (H1) in the Kuruman Iron Formation. (A) TEM image and SAED pattern (inset) of one hematite aggregate of ∼200 nm in size. (B) High-resolution TEM
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Stratigraphic variations in chemistry and isotopic compositions of samples ...
Published: 01 November 2013
, and initial 87 Sr/ 86 Sr ratios from carbonates are shown. Blue symbols—Kogelbeen (Kog) and lower Gamohaan Formations, gray symbols—transition between Ca-Mg carbonate and iron formation (Tsineng Member of Gamohaan Formation), red symbols—Kuruman Iron Formation. See the Data Repository (see footnote 1
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Fe contents (mol% FeCO 3 ) and Fe, C, and O isotope compositions (from  Hei...
Published: 01 November 2013
Figure 1. Fe contents (mol% FeCO 3 ) and Fe, C, and O isotope compositions (from Heimann et al., 2010 ) versus initial 87 Sr/ 86 Sr ratios (this study) for carbonates from Kuruman Iron Formation and Gamohaan Formation, South Africa. Isotopic compositions for carbonates in equilibrium (equil
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Scanning electron microscopic (SEM) and transmission electron microscopic (...
Published: 01 May 2015
B, D, and F are from Kuruman Iron Formation. (A–B) SEM images of H2 under secondary electron mode (SE). (C–D) TEM images of H2 showing dislocations connecting them (white arrows) and “strained” bubbles structures (black arrows with “B”). (E) Magnified image of the arrowed hematite crystals in C. (F
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Optic microscopic (OM) and scanning electron microscopic (SEM) images of pe...
Published: 01 May 2015
Figure 4. Optic microscopic (OM) and scanning electron microscopic (SEM) images of petrographic features of hematite (Hem) from the Kuruman Iron Formation. (A) Reflected light (RL) image of submicrometer hematite crystals (H2) as evident by bright dots with arrows scattered amongst the chert
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Photomicrographs of diagenetic to very low-grade metamorphic BIF assemblage...
Published: 01 October 2005
) Siderite-rich iron-formation with dark bands of siderite and light bands of chert. Kuruman Iron Formation, South Africa. From Beukes et al. (1990) .