Palaeomagnetism and 40Ar/39Ar geochronology of mafic dykes from the eastern Bushveld Complex (South Africa)

Geophysical Journal International

Volumn 162, Issue 1, 2005, Pages 36-48

  Letts, S ^a   Torsvik, Trond H ^a,b,c   Webb, S J ^a   Ashwal, L D ^a   Eide, E A ^b   Chunnett, G ^d  

^a UNIVERSITY OF THE WITWATERSRAND   (South Africa)

^b GEOLOGICAL SURVEY OF NORWAY   (Norway)

^c NORWEGIAN UNIVERSITY OF SCIENCE AND TECHNOLOGY   (Norway)

^d Anglo Platinum South Africa   (South Africa)

Author keywords

Bushveld; Dykes; Geochronology; Palaeomagnetism; Precambrian

Indexed keywords

ARGON-ARGON DATING; DIKE; PALEOMAGNETISM; POLAR WANDERING; PRECAMBRIAN;

AFRICA; BUSHVELD COMPLEX; EASTERN HEMISPHERE; SOUTH AFRICA; SOUTHERN AFRICA; SUB-SAHARAN AFRICA; WORLD;

EID: 21644449949     PISSN: 0956540X     EISSN: None     Source Type: Journal    
DOI: 10.1111/j.1365-246X.2005.02632.x     Document Type: Article

References (30)

1. Ade-Hall, J.M., Palmer, H.C. & Hubbar, T.P., 1971. The magnetic and opaque petrological response of basalt to regional hydrothermal alteration, Geophys. J. R. astr. Soc., 24, 137-174.
2. Ashwal, L.D., Webb, S.J. & Knoper, M.W., 2000. Physical properties of Bushveld rocks: magnetic and density profiles in the Bellevue drillcore, Northern Lobe, Workshop on the Bushveld Complex: Gethlane Lodge, Burgersfort, abstr, 4-5.
3. Buick, I.S., Mass, R. & Gibson, R., 2001. Precise U-Pb titanite age constraints on the Bushveld Complex, South Africa, J. geol. Soc. Lond., 158, 3-6.
4. Crow, C. & Condie, K.C., 1990. Geochemisrty and origin of early Proterozoic volcanic rocks from the Transvaal and Soutpansberg successions South Africa, Precamb. Res., 47, 17-26.
5. Duffield, W.A. & Dalrymple, G.B., 1990. The Taylor Creek rhyolite of New-Mexico - A rapidly emplaced field of lava domes and flows, Bull. Volc., 52, 475-487.
6. Eales, H.V., Marsh, J.S. & Cox, K.G., 1984. The Karoo igneous province: An introduction, in Petrogenesis of the Volcanic Rocks of the Karoo Province, pp. 1-26, ed. Erlank, A.J., Geological Society of South Africa, Johannesburg.
7. Evans, D.A.D., Beukes, N.J. & Kirschvink, J.L., 2002. Paleomagnetism of a lateritic paleoweathering horizon and overlying Paleoproterozoic red beds from South Africa: Implications for the Kaapvaal apparent polar wander path and a confirmation of atmospheric oxygen enrichment, J. geophys. Res., 107, 12, 2326, doi:10.1029/2001JB000432.
8. Hanson, R.E., Gose, W.A., Crowley, J.L., Ramezani, J., Bowring, S.A., Bullen, D.S., Hall, R.P., Pancake, J.A. & Mukwakwani, J., 2004. Paleoproterozoic intraplate magmatism and basin development on the Kaapvall Craton: Age, paleomagnetism and geochemistry of ∼1.93 to ∼1.87 Ga post-Waterberg dolerites, S. Afr. J. Geol., 107, 53-74.
9. Hargraves, R.B., 1989. Palaeomagnetism of Mesozoic kimberlites in Southern Africa and the Cretaceous apparent polar wander curve for Africa, J. geophys. Res., 94, 1851-1866.
10. Hargraves, R.B., Rehacek, J. & Hooper, P.R., 1997. Palaeomagnetism of the Karoo igneous rocks in Southern Africa, S. Afr. J. Geol., 100, 195-212.
11. Hattingh, P.J., 1986a. The paleomagnetism of the main zone in the western Bushveld Complex, Earth planet. Sci. Lett., 79, 441-452.
12. Hattingh, P.J., 1986b. The paleomagnetism of the main zone of the eastern Bushveld Complex, Tectonophysics, 124, 271-295.
13. Hattingh, P.J., 1986c. The paleomagnetism of the Merensky Reef footwall rock of the Bushveld Complex, Trans. Geol. Soc. S. Afr., 89, 1-8.
14. Hattingh, P.J., 1989. Palaeomagnetism of the upper zone of the Bushveld Complex, Tectonophysics, 165, 131-142.
15. Hattingh, P.J. & Pauls, N.D., 1994. New palaeomagnetic results from the northern Bushveld Complex of South Africa, Precamb. Res., 69, 229-240.
16. Hunter, D.R. & Reid, D.L., 1987. Mafic dyke swarms in Southern Africa, in Mafic Dyke Swarms, pp. 445-456, eds Halls, B.C. & Fahrig, W.F., Geological Association of Canada, Geological Association of Canada, Special paper 34.
17. Lee, C.A., 1996. A review of the mineralization in the Bushveld Complex and some other layered mafic intrusions, in Layered Intrusions, Vol. 15, pp. 103-145, ed. Cawthorn, R.G., Developments in Petrology, Elsevier, Amsterdam, The Netherlands.
18. McFadden, P.L. & Lowes, F.J., 1981. The discrimination of mean directions drawn from Fisher distributions, Geophys. J. R. astr. Soc., 67, 19-33.
19. McFadden, P.L. & McElhinny, M.W., 1990. Classification of the reversal test in palaeomagnetism, Geophys. J. Int., 103, 725-729.
20. Maré, L.P., Oosthuizen, B.C., Corner, B., Nkwana, M.M. & Antoine, L.A.G., 2001. South African Geophysical Atlas, Council for Geoscience, Pretoria.
21. Molyneux, T.G., 1970. The geology of the area in the vicinity of Magnet Heights, Eastern Transvaal, with special reference to the magnetic iron ore, Geol. Soc. S. Afr., Spec. Publ., 1, 228-241.
22. Morgan, G.E., 1985. The paleomagnetism and cooling history of metamorphic and igneous rocks from the Limpopo Mobile Belt, southern Africa, Bull. geol. Soc. Am., 96, 663-675.
23. Nysæther, E., Torsvik, T.H., Feist, R., Walderhaug H.J. & Eide, E.A., 2002. Ordovician Palaeogeography with new palaeomagnetic data from the Montagne Noire (Southern France), Earth planet. Sci. Lett., 203, 329-341.
24. Rex, D.C. & Guise, P.G., 1995. Evaluation of argon standards with special emphasis on time scale measurements, in Phanerozoic Time Scale, 21-23. Bulletin Lias, ed. Odin, G.S., Information, IUGS Subcomission on Geochronology 13, Trondheim, Norway.
25. Sharpe, M.R., 1981. Petrology and geochemistry of pre-Bushveld and Waterberg mafic sills, Trans. geol. Soc. S. Afr., 84, 75-83.
26. Strauss, C.A., 1947. The petrology of a small dolerite and granophyre complex in the New Belgium Block, Potgeitersrus District, Trans. geol. Soc. S. Afr., 50, 73-104.
27. Torsvik, T.H. & Van der Voo, R., 2002. Refining Gondwana and Pangea palaeogeography: estimates of Phanerozoic non-dipole (octupole) fields, Geophys. J. Int., 151, 771-794.
28. 39Ar ages and cosmic ray exposure ages of Apollo 14 samples, Earth planet. Sci. Lett., 12, 19-35.
29. Uken, R. & Watkeys, M.K., 1997. An interpretation of mafic dyke swarms and their relationship with major mafic magmatic events on the Kaapvaal Craton and Limpopo Belt, S. Afr. J. Geol., 100(4), 341-348.
30. von Gruenewaldt, G., Sharpe, M.R. & Hatton, C.J., 1985. The Bushveld Complex: introduction and review, Economic Geology, 80(4), 803-812.