8[1]Vermaak, C F A brief overview of South Africa's mineral industry: world context and changing local circumstances[J]. Mineralium Deposita, 1997, 32: 312～322.
9[9]Ishihara S Granitoid series . mineralization in the Circum-Pacific Phanerozoic granitic belts[J]. Resource Geology, 1998, 48(4) 219～224.
10Kristiansson K,Malmqvist L. A new model mechanism for the transportation of radon through the ground Proc[C]. Soc. Explor. Geophys. 50th Int. Mtg, Houston. , Texas. 1980:2535- 2565.
