Petrography, age and origin of the Schiel alkaline complex, northern Transvaal, South Africa

Journal of African Earth Sciences

Volumn 22, Issue 2, 1996, Pages 133-145

  Barton Jr , J M ^a   Barton, E S ^b   Smith, C B ^b  

^a UNIVERSITY OF JOHANNESBURG   (South Africa)

^b UNIVERSITY OF THE WITWATERSRAND   (South Africa)

Author keywords

[No Author keywords available]

Indexed keywords

MAGMATISM; PROTEROZOIC; RIFTING; RUBIDIUM/STRONTIUM DATING; SAMARIUM/NEODYMIUM DATING; SYENITE; URANIUM/LEAD DATING;

SOUTH AFRICA, TRANSVAAL, SCHIEL COMPLEX;

EID: 0029774015     PISSN: 08995362     EISSN: None     Source Type: Journal    
DOI: 10.1016/0899-5362(96)00005-X     Document Type: Article

References (35)

1. Armstrong, R. A. 1987. Geochronological studies on Archaean and Proterozoic formations of the Foreland of the Namaqua Front and possible correlations on the Kaapvaal Craton. Ph. D. Thesis, Unpubl. 274p. University of the Witwatersrand, Johannesburg, South Africa.
2. Barton, J. M., Jr 1979. The chemical compositions, Rb-Sr isotopic systematics and tectonic setting of certain post-kinematic mafic igneous rocks, Limpopo mobile belt, southern Africa. Precambrian Research 9, 57-80.
3. Barton, J. M., Jr 1995. Constraints on the nature of the Proterozoic juxtaposing of the Central Zone of the Limpopo Belt with the Southern Marginal Zone and Kaapvaal Craton in the northern Transvaal. In: Extended Abstracts, Geocongress '95 (Edited by Barton, Jr, J. M. and Copperwaite, Y. E.) Geological Society South Africa, 170-173.
4. Barton, J. M., Jr, du Toit, M. C., van Reenen, D. D. and Ryan, B. 1983a. Geochronological studies in the southern marginal zone of the Limpopo mobile belt, southern Africa. Special Publication Geological Society South Africa 8, 55-64.
5. Barton, J. M., Jr, Ryan, B. and Fripp, R. E. P. 1983b. Rb-Sr and U-Th-Pb isotopic studies of the Sand River Gneisses, central zone, Limpopo mobile belt. Special Publication Geological Society South Africa 8, 9-18.
6. Barton, J. M., Jr, van Reenen, D. D. and Roering, C. 1990. The significance of 3000 Ma granulite-facies mafic dikes in the central zone of the Limpopo belt, southern Africa. Precambrian Research 48, 299-308.
7. Barton, J. M., Jr, Holzer, L., Kamber, B., Doig, R., Kramers, J. D. and Nyfeler, D. 1994. Discrete metamorphic events in the Limpopo belt, southern Africa: implications for the application of P-T paths in complex metamorphic terrains. Geology 22, 1035-1038.
8. Barton, J. M., Jr, Doig, R. and Smith, C. B. 1995. Age, origin and tectonic significance of the Entabeni granite, northern Transvaal, South Africa. South African Journal Geology 98, 326-330.
9. Bence, A. E. and Albee, A. L. 1968. Empirical correction factors for the electron microanalysis of silicates and oxides. Journal Geology 76, 382-403.
10. Cheney, E. S., Barton, J. M., Jr and Brandl, G. 1990. Age and extent of the Soutpansberg Sequences of southern Africa. South African Journal Geology 93, 664-675.
11. Compston, W., Williams, I. S. and Meyer, C. J. 1984. U-Pb geochronology of zircons from lunar breccia 73217 using a sensitive high mass-resolution ion microprobe. Journal Geophysical Research 89, B525-B534.
12. Cumming, G. L. and Richards, J. R. 1975. Ore lead ratios in a continuously changing earth. Earth Planetary Science Letters 28, 155-171.
13. Du Toit, M. G. 1979. Die geologie en struktuur van die gebiede Levubu en Bandelierkop in Noord-Transvaal. Ph. D. Thesis, Unpubl. 241p. Rand Afrikaans University, Johannesburg, South Africa.
14. Du Toit, M. C., van Reenen, D. D. and Roering, C. 1983. Some aspects of the geology, structure and metamorphism of the Southern Marginal Zone of the Limpopo Metamorphic Complex. Special Publication Geological Society South Africa 8, 121-142.
15. Eglington, B. M. and Harmer, R. E. 1991. GEODATE: a program for processing and regression of isotope data using IBM-compatible microcomputers. CSIR Manual EMA-H 9101, 57p.
16. Eriksson, S. C. 1984. Age of carbonatite and phoscorite magmatism of the Phalaborwa Complex (South Africa). Isotope Geoscience 2, 291-299.
17. Eriksson, S. C. 1989. Phalaborwa: A saga of magmatism and miscibility. In: Carbonatites: Genesis and Evolution (Edited by Bell, K.) pp221-249. Unwin Hyman, London.
18. Evensen, N. M., Hamilton, P. J. and O'Nions, R. K. 1978. Rare-earth abundances in chondritic meteorites. Geochimica Cosmochimica Acta 42, 1199-1212.
19. Joubert, P. 1964. The geology of the apatite occurrences and associated rocks on Schiel 54LT, Sibasa District. Report Geological Survey South Africa (unpublished), 62p.
20. Kamber, B. S., Kramers, J. D., Napier, R., Cliff, R. A. and Rollinson, H. R. 1995. The Triangle shear zone, Zimbabwe, revisted: what remains of the Limpopo Orogeny? Precambrian Research 70, 191-213.
21. Kruger, F. J., Cawthorn, R. G. and Walsh, K. L. 1987. Strontium isotopic evidence against magma addition in the Upper Zone of the Bushveld Complex. Earth Planetary Science Letters 84, 51-58.
22. 2), a case study from the Phalaborwa Igneous Complex, South Africa. South African Journal Geology 98, 1-4.
23. Roering, C., van Reenen, D. D., Smit, C. A., Barton, J. M., Jr, de Beer, J. H., de Wit, M. J., Stettler, E. H., van Schalkwyk, J. F., Stevens, G. and Pretorius, S. 1992. Tectonic model for the evolution of the Limpopo Belt. Precambrian Research 55, 539-552.
24. Sergeev, S. A., Meier, M. and Steiger, R. H. 1995. Improving the resolution of single-grain U/Pb dating by use of zircon extracted from feldspar: Application to the Variscan magmatic cycle in the central Alps. Earth Planetary Science Letters 134, 37-51.
25. Smit, C. A., Roering, C. and van Reenen, D. D. 1992. The structural framework of the southern margin of the Limpopo Belt, South Africa. Precambrian Research 55, 51-67.
26. Stacey, J. S. and Kramers, J. D. 1975. Approximation of terrestrial lead isotope evolution by a two-stage model. Earth Planetary Science Letters 26, 207-221.
27. Steiger, R. H. and Jäger, E. 1977. Subcommission on geochronology: Convention of the use of decay constants in geo- and cosmochronology. Earth Planetary Science Letters 36, 359-362.
28. Stettler, E. H., de Beer, J. H. and Blom, M. P. 1989. Crustal domains in the northern Kaapvaal Craton as defined by magnetic lineaments. Precambrian Research 45, 263-276.
29. Stettler, E. H., Coetzee, H., Rogers, H. J. J. and Lubala, R. T. 1993. The Schiel Alkaline Complex: geological setting and geophysical investigation. South African Journal Geology 96, 96-107.
30. Taylor, P. N., Kramers, J. D., Moorbath, S., Wilson, J. F., Orpen, J. L. and Martin, A. 1991. Pb/Pb, Sm-Nd and Rb-Sr geochronology in the Archean Craton of Zimbabwe. Chemical Geology (Isotope Geology Section) 87, 175-196.
31. Van Reenen, D. D. 1986. Hydration of cordierite and hypersthene and a description of the retrograde orthoamphibole isograd in the Limpopo belt, South Africa. American Mineralogist 71, 896-911.
32. Van Reenen, D. D., Barton, J. M., Jr, Roering, C., Smit, C. A. and van Schalkwyk, J. F. 1987. Deep crustal response to continental collision: The Limpopo belt of southern Africa. Geology 15, 11-14.
33. Verwoerd, W. J. 1986. Mineral deposits associated with carbonatites and alkaline rocks. In: Mineral Deposits of Southern Africa (Edited by Anhaeusser, C. R. and Maske, S.) pp2173-2191. Geological Society South Africa, Johannesburg.
34. Walraven, F., Frick, C. and Lubala, R. T. 1992. Pb-isotope geochronology of the Schiel Complex, northern Transvaal, South Africa. Journal African Earth Sciences 15, 103-110.
35. Williams, I. S. and Claesson, S. 1987. Isotopic evidence for the Precambrian provenance and Caledonian metamorphism of high-grade paragneisses from the Seve Nappes, Scandinavian Calendonides: II. Ion microprobe zircon U-Th-Pb. Contributions Mineralogy Petrology 97, 205-217.