Geocongress 84: 20. Geological Congress of the Geological Society of South Africa. Pilanesberg Excursion, 14-16 July 1984

摘要

The Pilanesberg Complex is situated in Bophuthatswana about 50 km to the north north-west of Rustenberg in the Western Transvaal. The basic geological setting of the Pilanesberg is discussed, as well as its geochemistry. Of the major rock types the co-called Ledig foyaite has the highest content of trace elements and this is followed by green foyaite. The Th/U ratio is approximately 5 for the complex as a whole. The high concentrations of uranium and thorium resulted in a pronounced radiometric anomaly over the whole complex, the details of which are given in tables. The occurences of relatively high radiometric anomalies located during ground surveys are also described. (Atomindex citation 17:046956)