Witwatersrand basin

Jones M. Q. W. (1988) Heat flow in the Witwatersrand Basin and environs and its significance for the South African shield geotherm and lithosphere thickness. J. Geophys. Res. 93, 3243-3260. 

These observations complement those made since the early 1990s on the gold-uranium ores of the Witwatersrand Basin in South Africa and on the uranium ores of the Elliot Lake District in... 

Experiments by Grandstaff (1976, 1980) and more recently by Ono (2002) on the oxidation and dissolution or uraninite can be used to set a rough upper limit of 10 -10 atm on the O2 content of the atmosphere during the formation of the Au-U deposits of the Witwatersrand Basin (Holland, 1984, chapter 7). This maximum O2 pressure is much greater than that permitted by the presence of MIF of sulfur isotopes during the last 0.5 Ga of the Archean the observations do, however, complement each other. 

Witwatersrand basin based on Re-Os isotopes. Geochim. Cosmochim. Acta 65, 2149-2159. 

Robb L. J., Davis D. W., Kamo S. L., and Meyer F. M. (1992) Ages of altered granites adjoining the Witwatersrand Basin with implications for the origin of gold and uranium. Nature 357, 677-680. 

Drennen, G. R., Robb, L. J., Meyer, F. M., Armstrong, R. A. DE Bruiyn, H. 1990. The nature of the Archaean basement in the hinterland of the Witwatersrand Basin II. A crustal profile west of the Welkom Goldfield and comparisons with the Vredefort erustal profile. South African Journal of Geology, 93, 41-53. 

The relatively small number of late Archaean basins may reflect a low preservation potential, but may also indicate that relatively few cratonic nuclei had stabilized before the end of the Archaean. Examples of late Archaean basins include the (3.1-2.7 Ga) Witwatersrand basin in South Africa (Robb Meyer, 1995), and its correlative the 3.0-2.67 Ga Pongola Supergroup in Swaziland (Walraven. Pape, 1994 Gold von Veh, 1995), both unconformable upon the Kaapvaal Craton. In western Australia the 2.77-2.71 Ga Fortescue Group is unconformable upon older Archaean rocks of the Pilbara Craton (Blake et al., 2004). 

The Witwatersrand Basin The best known late Archaean sedimentary basin is the Witwatersrand Basin, for it hosts the world s richest gold province and is also an important source of uranium. For these reasons the geology of this basin is known in considerable detail. The Witwatersrand basin contains a 7 km-thick succession of terrigenous sediments and volcanic rocks, formed between 3.074 and 2.714 Ga ago. 

Much of the gold in the Witwatersrand basin is located in conglomerates within the Central Rand Group. These are part of a succession of predominantly coarse clastic... 

FIGURE 1.8 Geological map and stratigraphy of the Witwatersrand basin, showing the main geological emits and the location of the main goldfields. 

Archaean Witwatersrand Basin, South Africa. J. Geol. Soc. Lond., 155, 39-59. 

Kosticin, N. and Krapez, B., 2004. Relationship between detrital zircon age-spectra and the tectonic evolution of the late Archaean Witwatersrand Basin, South Africa. Precambrian Res., 129, 141-68. 

Robb, L.J. and Meyer, F.M., 1995. The Witwatersrand Basin, South Africa geological framework and... 

Canadian and Fennoscandian shield [44], and Witwatersrand Basin, South Africa [45]. This mechanism is generally most important for granites, in which the content of the principal radiogenic elements U, Th, and, K is generally highest among crustal rock types [46]. 

McGarr and Bicknell[1990] Witwatersrand Basin, South Africa 200 km 7 seismometers not available 100 Hz 0to3... 

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