76 PRESIDENTIAL ADDRESS — SECTION B. 



To date over £22,500,000 worth of copper has been produced 

 in this region. 



This area also yields corundum and merchantable mica, and 

 columbite, beryl, and spodumene occur in the pegmatites of the 

 Steinkopf district. 



It is thus evidently highly mineralised, but is unfortunately 

 handicapped by its inaccessibility, its arid character, and the 

 lack of transport facilities. 



The West Coast Region of the Capf. Province. 



This includes a strip of country running along the west coast 

 of the Cape Province from Cape Point to the mouth of the 

 Orange River. 



It is occupied by rocks belonging to the Nama system, 

 granite, and porphyries intrusive in them, recent calcareous 

 deposits and sands, and for convenience has been made to embrace 

 several areas of Table Mountain sandstone. 



Its mineral products include tin, rock-phosphate, building- 

 stone, clays, limestone, and niineral-water. 



Among other economic minerals that occur, but have not 

 hitherto been discovered in workable quantities, mention may be 

 made of wolframite, arsenopyrite, molybdenite, and gypsum. 



In the matter of future discoveries, rock-phosphates and tin 

 appear to hold out the greatest promise. Du Toit's investigations 

 of the phosphate deposits of Saldanha Bay render it highly prob- 

 able thatsimJar occurrences, not onlyof aluminous rock-phosphate, 

 but of phosphorite, are to be found along the coast, and the whole 

 of the littoral between Table Bay and the Orange River mouth 

 appears to be worthy of careful investigation. As regards tin, 

 it would be remarkable indeed if further workable deposits of 

 that metal do not await discovery around the margins of the 

 great intrusions of granite in the Western Province, while the 

 newer granites of the Van Rhyn's Dorp district and Tittle Nama- 

 qualand offer possibilities in the same direction. 



The Cape System Province. 



The Cape System Province embraces practically the whole 

 extent of country in the southern and south-western districts of 

 the Cape Province occupied tjy the rocks of the Cape and Creta- 

 ceaus systems, and the important inliers of the Nama system in 

 these. 



The area is singularly deficient in metallic mineral wealth, 

 which is probably due to the almost complete absence of igneous 

 rocks within it. 



The only important occurrences of metallic minerals hitherto 

 discovered are the veins and deposits of manganese ore in the 

 Table Mountain sandstone series in the Western Province, the 

 alluvial gold deposits of the Millwood fields, in the Knysna 



