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Letaba River Basalt Formation

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Journal Article
Published: 01 March 2000
South African Journal of Geology (2000) 103 (1): 69-73.
... geological map showing the distribution of Karoo-age volcanic rocks in the South Africa — Swaziland — Mozambique — Lesotho region. The Letaba Formation ( SACS, 1980 ) is exposed west of the Lebombo Mountain Range and, together with the units previously known as the Sabie River Basalt Formation (Cox...
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Journal Article
Published: 01 April 1987
Journal of the Geological Society (1987) 144 (2): 275-280.
...K. G. COX Abstract Karoo picrite basalts from the Letaba Formation of SE Zimbabwe and the NE Transvaal contain rare but widespread multigrain aggregates of high-pressure orthopyroxene. These are of two types interpreted as (a) crystallization products of the host liquids, (b) restite fragments...
Journal Article
Published: 01 September 2005
South African Journal of Geology (2005) 108 (2): 173-186.
... with interbedded basalts Sabi River 5.6km 178 Ma (b) Low-Mg basalts Upper Olifants Rhyolite lava Lower Olifants Rhyolite lava Letaba 1.3km 177±9 Ma (b) Picro-basalts Mashikiri ~300m 178 Ma (b) Nephelinites Shishwayini ~130cm Volcanoclastics Unconformity Clarens...
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Journal Article
Published: 01 July 2004
Journal of the Geological Society (2004) 161 (4): 547-550.
... margin and reported radiometric ages. Magnetostratigraphic information is from Hargreaves et al. (1997) . The Letaba Formation picrites are in turn overlain by a major succession (4–5 km thick) of low-MgO basalts, termed the Sabie River Basalt Formation ( Cleverly & Bristow 1979...
FIGURES
Journal Article
Published: 17 April 2018
Journal of the Geological Society (2018) 175 (4): 594-604.
..., the Sabie River Basalt and Jozini Rhyolite ( Hargreaves et al. 1997 ). The radioisotopic ages from Lebombo are from Riley et al. (2004) and recalculated from Duncan et al. (1997) . The stratigraphic levels of the analysed samples...
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Journal Article
Published: 01 December 2007
South African Journal of Geology (2007) 110 (4): 503-510.
... 0 to 30 m thick. Maximum thickness of Beaufort Group correlatives is about 10 m, while combined thickness of the Irrigasie (Molteno) and Clarence Formations varies from 70 to 140 m. The basalts of the Letaba Formation vary from 45 to 195 m, but the top is erosional. The minimum vertical displacement...
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Journal Article
Published: 01 December 2014
South African Journal of Geology (2014) 117 (2): 193-210.
... of boreholes on a north south line across the coalfield that confirmed that the Mogalakwena Formation forms the basement in the central part of the coalfield right up to the Zoetfontein fault (personal communication, Dreyer, 2010), with coal-bearing beds that are well developed in the Grootegeluk Formation...
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Journal Article
Published: 01 March 2015
South African Journal of Geology (2015) 118 (1): 83-90.
... spring is underlain by basalt and minor andesite of the Letaba Formation, Lebombo Group, and the Karoo Supergroup. The Lebombo Group rests on the Tshipise member of the Clarence Formations which comprises white to cream-coloured sandstones. These lithologies are intruded with Karoo dolerite dykes...
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Journal Article
Published: 01 March 2015
South African Journal of Geology (2015) 118 (1): 91-107.
...′ and X representing the location of the geological cross-section). Regionally, the oldest rock exposures in the Maputaland area are the Jurassic-age flood basalts of the Letaba Formation and rhyodacites and rhyolites of the Jozini Formation ( Watkeys et al., 1993 , Botha and Singh, 2012...
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Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2405(11)
... that magmatic arc formation began on the Kaapvaal Craton ca. 3600 Ma ( Poujol et al., 2003 ; Eglington and Armstrong, 2004 ) and continued episodically at intervals of between 100 and 200 m.y., resulting in the construction of discrete microcontinents that eventually coalesced to form the Kaapvaal Craton ( De...