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Tjakastad Belt

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Journal Article
Published: 01 June 2001
South African Journal of Geology (2001) 104 (2): 167-204.
... by the Nelshoogte Schist Belt. These rocks have, in the past, been correlated with the c . 3500 Ma lithologies in the lower division of the Barberton Supergroup ( viz ., the Tjakastad Subgroup of the Onverwacht Group in the Komati River type locality). Recent studies elsewhere in the Barberton region (including...
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Journal Article
Journal: GSA Bulletin
Published: 01 November 2015
GSA Bulletin (2015) 127 (11-12): 1550-1557.
...-temperature ( P - T ) data derived from quantitative P - T pseudosections to determine clockwise P - T paths for several samples from the Tjakastad schist belt. The Tjakastad schist belt is located in the central portion of the Stolzburg domain 1 at the southwestern end of the Barberton Granite...
Journal Article
Journal: GSA Bulletin
Published: 01 November 2015
GSA Bulletin (2015) 127 (11-12): 1558-1563.
...) weighs in on this central controversy around the likely geodynamic environments that prevailed in the Archean Earth, and he focuses on the Barberton granite-greenstone belt as one of the type localities of Archean crustal processes in the world. In the Barberton granite-greenstone belt, 3.55–3.45 Ga...
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Journal Article
Journal: GSA Bulletin
Published: 01 March 2014
GSA Bulletin (2014) 126 (3-4): 251-270.
...Kathryn A. Cutts; Gary Stevens; J. Elis Hoffmann; Ian S. Buick; Dirk Frei; Carsten Münker Abstract The Barberton Granite-Greenstone Belt (BGGB) of South Africa is an exceptionally well preserved Meso-Paleoarchean metamorphic supracrustal belt, one of only a few in the world. Studies of metamorphism...
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Journal Article
Journal: Geology
Published: 19 May 2017
Geology (2017) 45 (8): 695-698.
... in the Tjakastad area, southwestern Barberton Greenstone Belt, South Africa, with implications for Archaean tectonics : Chemical Geology , v. 261 , p. 115 – 139 , doi:10.1016/j.chemgeo.2008.11.006. In comparison to the underlying conglomerates, the zircons of the Footbridge Chert are not only much...
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Journal Article
Published: 01 November 2015
American Mineralogist (2015) 100 (11-12): 2396-2411.
...Janne Blichert-Toft; Nicholas T. Arndt; Allan Wilson; Grace Coetzee Abstract To constrain the origin of komatiites from the Barberton Greenstone Belt, South Africa, we measured 147 Sm- 143 Nd and 176 Lu- 176 Hf compositions for 18 komatiites from core obtained during the International Continental...
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Journal Article
Published: 01 March 2019
South African Journal of Geology (2019) 122 (1): 17-38.
..., and age dating of the Lomati Delta Complex, a morphologically prominent, wedge-shaped and dominantly arenaceous unit in the middle Moodies Group (~3.22 Ga) of the central Barberton Greenstone Belt (BGB). Subvertical regional bedding allows cross-sectional correlation within a prograding delta complex from...
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Journal Article
Published: 01 June 2019
South African Journal of Geology (2019)
...C.R. Anhaeusser Abstract Formations on the northwestern flank of the Barberton Greenstone Belt have hosted over 85% of all the gold recovered from the ca. 3550 to 3000 Ma Barberton Supergroup since early discoveries in 1872. This sector of the greenstone belt also happens to coincide with a complex...
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Journal Article
Journal: GSA Bulletin
Published: 01 January 2010
GSA Bulletin (2010) 122 (1-2): 183-197.
... for detailed P-T estimates. Figure 8 also plots P-T conditions obtained by Diener et al. (2005) for retrograde mineral assemblages in the Theespruit Formation in the Tjakastad schist belt, which illustrate the near-isothermal decompression path of the terrane. As in the Stolzburg and Theespruit areas...
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Journal Article
Journal: GSA Bulletin
Published: 01 July 2012
GSA Bulletin (2012) 124 (7-8): 1191-1211.
... craton. Successive high-grade metamorphic events recorded by the gneisses between ca. 3.23 and 3.07 Ga not only coincided with the timing of subduction-accretion in the adjacent Barberton greenstone belt at ca. 3.23–3.22 Ga, but also with discrete pulses of potassic granitic magmatism during...
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Journal Article
Published: 01 January 2015
Journal of the Geological Society (2015) 172 (1): 139-152.
...) c . 3.58 Ga granitoid crust was the basement for the sedimentary protoliths. Furthermore, enrichment in Ni and Cr in the Mahamba metasediments may originate from erosion of a greenstone terrane similar in composition to the dominantly mafic and ultramafic lithologies of the Barberton Greenstone Belt...
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Journal Article
Published: 01 February 2014
Mineralogical Magazine (2014) 78 (1): 145-163.
...B. O'Driscoll; P. L. Clay; R. G. Cawthorn; D. Lenaz; J. Adetunji; A. Kronz Abstract The 3.5 Ga Bon Accord Ni deposit occurs within the lowest serpentinized mafic–ultramafic lavas of the Barberton Greenstone Belt (South Africa). Though now completely mined out, it comprised a suite of rare Ni-rich...
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Journal Article
Published: 01 June 2012
South African Journal of Geology (2012) 115 (2): 171-210.
... Complexes in the southwestern part of the Paleoarchean Barberton Greenstone Belt. The lavas are predominantly high- to low-MgO tholeiitic basalts but include minor komatiite and komatiitic basalt. They are non-deformed and preserve delicate igneous textures, but have been allochemically altered...
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Journal Article
Published: 29 July 2016
Canadian Journal of Earth Sciences (2016) 53 (12): 1511-1538.
... are developed in the Ottawa River Gneiss Complex (ORGC; former Central Gneiss Belt; Fig. 1 ; see Appendix A for discussion), a large granulite- to upper amphibolite-facies metamorphic core complex with dimensions of <250 × 400 km in the southwestern Grenville Province of Ontario and western Quebec...
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Journal Article
Published: 01 September 2012
South African Journal of Geology (2012) 115 (3): 369-384.
... of the Barberton greenstone belt (BGB) ( Schoene et al., 2008 ; Schoene and Bowring, 2010 ; Lana et al., 2011 ; Zeh et al., 2011 ; Taylor et al., 2012 ), although, surprisingly, we currently have a relatively limited basic understanding of the geology of this terrane. The Ancient Gneiss Complex (AGC...
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Journal Article
Published: 01 January 2016
Reviews in Mineralogy and Geochemistry (2016) 81 (1): 489-578.
...% in that paper. The Great Dyke (Zimbabwe) is a 2575 ± 0.7 Ma intrusion emplaced into Archean granites and greenstone belts of the Zimbabwean craton ( Oberthür et al. 2002 ). Its lower Ultramafic Sequence contains chromitites with sub-economic concentrations of the PGE. The Main Sulfide Zone (MSZ) contains...
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