Peperitic upper margin of an invasive flow, Karoo flood basalt province, northern Lebombo

South African Journal of Geology

Volumn 102, Issue 4, 1999, Pages 377-383

  Rawlings, D J ^a   Watkeys, M K ^b   Sweeney, R J ^c  

^a UNIVERSITY OF TASMANIA   (Australia)

^b UNIVERSITY OF KWAZULU NATAL   (South Africa)

^c De Beers Diamond Research Laboratory   (South Africa)

Author keywords

[No Author keywords available]

Indexed keywords

FLOOD BASALT; LAVA FLOW; PEPERITE;

SOUTH AFRICA;

EID: 0033511195     PISSN: 10120750     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (26)

1. Allsopp, H.L., Manton, W.I., Bristow, J.W. and Erlank, A.J. (1984). Rb-Sr geochronology of Karoo felsic volcanics. In: Erlank, A.J. (Ed.), Petrogenesis of the Volcanic Rocks of the Karoo Province. Spec. Publ., Geol. Soc. S. Afr., 13, 273-280.
2. Branney, M.J. and Suthren, R.J. (1988). High-level peperitic sills in the English Lake District; distinction from block lavas, and implications for Borrowdale Volcanic Group stratigraphy. J. Geol., 23, 171-187.
3. Bristow, J.W. (1982). Geology and structure of Karoo volcanic and sedimentary rocks of the northern and central Lebombo. Trans. Geol. Soc. S. Afr., 85, 167-178.
4. Bristow, J.W. and Saggerson, E.P. (1983). A review of Karoo vulcanicity in southern Africa. Bull. Volcanol., 46, 135-159.
5. Busby-Spera, C.J. and White, J.D.L. (1987). Variation in peperite textures associated with differing host-sediment properties. Bull. Volcanol., 49, 765-775.
6. Byerly, G. and Swanson, D. (1978). Invasive Columbia River Basalt flows along the northwestern margin of the Columbia Plateau, north-central Washington. Abstr. Prgms, Geol. Soc. Am., Geol. Soc. Am., 10, 98.
7. Cleverly, R.W. and Bristow, J.W. (1979). Revised volcanic stratigraphy of the Lebombo Monocline. Trans. Geol. Soc. S. Afr., 82, 227-230.
8. Cox, K.G. and Bristow, J.W. (1984). The Sabie River Basalt Formation of the Lebombo Monocline and south-east Zimbabwe. In: Erlank, A.J. (Ed.), Petrogenesis of the Volcanics Rocks of the Karoo Province. Spec. Publ. Geol. Soc. S. Afr., 13, 125-148.
9. Fisher, R.V. (1960). Classification of volcanic breccias. Bull. Geol. Soc. Am., 71, 973-982.
10. Hanson, R.E. (1991). Quenching and hydroclastic disruption of andesitic to rhyolitic intrusions in a submarine island-arc sequence, northern Sierra Nevada, California. Bull. Geol. Soc. Am., 103, 804-816.
11. Hooper, P.R. (1997). The Columbia River flood basalt province; current status. In: Mahoney, J.J. and Coffin, M.F. (Eds.), Large Igneous Provinces; Continental, Oceanic, and Planetary Flood Volcanism. Monogr Am. Geophys. Un., 100, 1-27.
12. Keszthelyi, L. and Self, S. (1998). Some physical requirements for the emplacement of long basaltic lava flows. J. Geophys. Res., 103, 27447-27464.
13. Kokelaar, B.P. (1982). Fluidisation of wet sediments during the emplacement and cooling of various igneous bodies. J. Geol. Soc. Lond., 139, 21-33.
14. Kokelaar, B.P. (1986). Magma-water interactions in subaqueous and emergent basaltic volcanism. Bull. Volcanol., 48, 275-291.
15. McPhie, J., Doyle, M. and Allen, R. (1993). Volcanic textures - a guide to the interpretation of textures in volcanic rocks. CODES Key Centre Publ., Tasmania, 198 pp.
16. Moseley, F. and Millward, D. (1982). Ordovician volcanicity in the English Lake District. In: Sutherland D.S. (Ed.), Igneous Rocks of the British Isles. John Wiley & Sons, Chichester, UK, 93-111.
17. Rawlings, D.J. (1993). Mafic peperite from the Gold Creek Volcanics in the Middle Proterozoic McArthur Basin, Northern Territory. Aust. J. Earth Sci., 40, 109-114.
18. Saggerson, E.P. and Bristow, J.W. (1983). The geology and structural relationships of the southern Lebombo volcanic and intrusive rocks, South Africa. Bull. Volcanol. 46, 161-181.
19. Schmincke, H-U. (1967). Fused tuff and peperites in south-central Washington. Bull. Geol. Soc. Am., 78, 319-330.
20. Self, S., Thordarson, T. and Keszthelyi, L. (1997). Emplacement of continental flood basalt lava flows. In: Mahoney, J.J. and Coffin, M.F. (Eds.), Large Igneous Provinces; Continental, Oceanic, and Planetary Flood Volcanism. Monogr. Am. Geophys. Un., 100, 381-410.
21. Sweeney, R.J. (1988). Geochemistry of the Sabie River Basalt Formation in the central Lebombo, Karoo Igneous Province. Ph.D. thesis (unpubl.), Univ. Cape Town, South Africa, 198 pp.
22. Sweeney, R.J., Duncan, A.R. and Erlank, A.J. (1994). Geochemistry and petrogenesis of central Lebombo basalts of the Karoo igneous province. J. Petrology, 35, 95-125.
23. Walton, M.S., Jr. and O'Sullivan, R.B. (1950). The intrusive mechanics of a clastic dike. Am. J. Sc., 248, 1-21.
24. Watkeys, M.K. and Sokoutis, D. (1998). Transtension in southeastern Africa associated with Gondwana breakup. Spec. Publ. Geol. Soc. Lond., 135, 203-214.
25. Watkeys, M.K. and Sweeney, R.J. (1998). Karoo Volcanism along the Lebombo. Field Excursion Guide 2A, IAVCEI Int. Volcanol. Congress, Cape Town, South Africa, 36 pp.
26. White, J., McPhie, J. and Skilling, I. (in press) Peperite: a useful genetic term. Bull. Volcanol.