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On the Probable Origin of the Members of the Bushveld Igneous Complex (Transvaal)

Published online by Cambridge University Press:  01 May 2009

C. G. S. Sandberg
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Extract

The Bushveld Igneous Complex lately formed the object of a study by the Shaler Memorial Fund Expedition and some members of the staff of the Geological Survey of South Africa, the principal object being to ascertain and fix its relation towards the upper division of the Waterberg Sedimentary System. Their report, published in the Journal of Geology, would seem to furnish the necessary complementary data to fix the origin of the magmatic complex concerned, to a degree of extreme probability, as may be shown in the following.

Type
Original Articles
Information
Geological Magazine , Volume 63 , Issue 5 , May 1926 , pp. 210 - 219
Copyright
Copyright © Cambridge University Press 1926

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References

page 210 note 1 Daly, R. A. and Molengraaff, G. A. F., “Structural relations of the Bushveld Igneous Complex, Transvaal,” Journ. of Geol., vol. xxxii. No. 1, 1924, pp. 1–35.CrossRefGoogle Scholar

page 210 note 2 Sandberg, C. G. S.,“Geo-dynamische Probleme I and II,” Gebr. Borntraeger, Berlin, 1924.Google Scholar Ibid., “Isostatic Tendencies as the origin of all Geodynamic Phenomena,” Geol. Mag., Vol. LXI, No. 725, 11., 1924, pp. 482–93. See also Bowie, W., “Isostatic investigations and data for gravity stations in the U.S., etc.,” Dept. of Commerce, Washington, ser. No. 246, 1924.Google Scholar , Goldschmidt, Stammestypen der Eruptivgesteine. Vid. Skr. 1. Mat. Nat. Kl. 1922, No. 10, Kristiania.Google Scholar E. Haug, Traite de Géologie, Arm. Colin, 1907.Google Scholar

page 211 note 1 Molengraaff, G. A. F., “Esquisse géologique de la République Sud-Africaine du Transvaal,” Bull. Soc. Géol. de Fr., 4e Série, T. I, 1901 (also German translation).Google Scholar

page 211 note 2 Mellor, E. T., “Report on Portions of the Pretoria and Middelburg Districts etc.,” Ann. Report Geol. Surv. Transvaal, 1903 (Pretoria, 1904), pp. 7–37, a.o.Google Scholar

page 211 note 3 Daly, R. R. and Molengraaff, G. A. F., loc. cit., p. 2. The italics are mine.Google Scholar

page 213 note 1 Molengraaff, G. A. F., “On the deposits of iron ore in the Transvaal.”. Trans. Int. Geol. Congress Stockholm, 1910, pp. 1057–62.Google Scholar Ibid. loc. cit. (1), p. 53.

page 213 note 2 Haug, E., Traité de Géologie. Arm. Colin, Paris, 1907. C. G. S. Sandberg, loc. cit, (2).Google Scholar

page 213 note 3 The bracketed remark is mine.

page 215 note 1 Haug, E., Traité de Géeologie; C. G. S. Sandberg, Geo-dynamische Probleme.Google Scholar

page 215 note 2 In Fig. 2 opposite this rock is marked Red Granite.

page 215 note 3 Mellor, E. T., loc. cit.Google Scholar

page 215 note 4 Daly, R. A., “The Genesis of Alkaline Rocks,” Journ. of Geol., vol. xxvi. No. 2, 1918, pp. 97–134. M. Lugeon and Oulianoff, Sur la Géologic du Massif de la Croix de Fer. C. R. Ac. Sc. Paris, t. 171, pp. 563–5, 1920.CrossRefGoogle Scholar

page 215 note 5 Wagner, P. A., “Report on the Crocodile River Iron Deposits,” Geol. Surv. Mem., No. 17, 1921 (Dept. of Mines, S. Africa).Google Scholar

page 215 note 6 Molengraffe, G. A. F., “On the Deposits of Iron-Ore, etc.,” loc. cit.Google Scholar

page 216 note 1 Wagner, P. A, loc. cit.Google Scholar

page 217 note 1 The unconformity between the two successive systems would also favour this process.