LTDENBUKG AND DE KAAP, TEAJfSVAAL, SOUTH APKICA. 5/l> 



/. Several miles to the N.W., and still bordering the granite, we 

 come to the so-called " Welcome Reef," ou the south bank of the Lam- 

 pongwana river, and 10 or 12 miles due east of De Kaap. Here the 

 rocks are similar to those of the Caledonia reef, a soft talcose or 

 steatitic foliated schist being also exposed — still vertical, but now 

 striking N.W. The reef is a seam of quartz, apparently striking 

 with the stratified rocks. 



The "Welcome Reef" appears to follow the strike of the rocks, 

 N.W., but this is not certain, and it dips somewhat into the hill on 

 the west, whilst the strata, being here tilted by the granite, might be 

 expected to dip, if at all, the other way ; the evidence, however, 

 is very obscure. The lode varies from 6 inches to 6 feet, and 

 consists of white and tinted glassy quartz, containing much earthy 

 carbonate of copper and oxide of iron, with occasional specks of 

 visible gold. Some veinstone, taken at a depth of 15 feet, yielded 

 gold at the rate of 1 oz. 4 dwt. 21 grs. per ton. All stone having 

 been rejected in which the metal could be seen, it will be within 

 reasonable bounds to assume an average of between 1| and 1| oz,' 

 per ton. 



The above observations extend about two thirds around the cen- 

 tral boss of granite, and show that thus far the strike of the stratified 

 rocks coincides with its margin, varying, as it does, from S. of E., 

 through N.E. and N.N.W. to W.N.W. This afi'ords ample evidence 

 that their upheaval into a vertical position is due to the intrusion 

 of the granite. Along the western side of the granite the same 

 phenomenon is evident, although not so clear, owing to slips and 

 accumulations of talus under the high krantz; but the edges of 

 vertical rocks may be occasionally seen, striking in a generally 

 northerly direction. I think there can be but little doubt, if any, 

 that the Kaap Mountains and the Godwaan Plateau nearly coincide 

 with the margin of the granite. 



The north-westerly strike, which was the last observed, appears 

 to be continued, but rather more westerly, beneath the Godwaan 

 Plateau, as vertical schistose rocks, with W.K.W. strike, are seen 

 in the bottom of the Eland's Spruit valley. Between those points 

 there is a ridge or spur jutting out from the " berg " a little I^. of 

 De Kaap, in an E.N.E. direction. The beds forming this ridge are 

 quartzose foliated schists, of a peculiar character and different from 

 anything I have seen elsewhere. The strike of the beds coincides 

 with the ridge, W.S.W., and they dip very sharply to the IT., in- 

 deed are almost vertical. To the north of the ridge tbe granite 

 again comes to the surface, and, as stated before, widens out towards 

 the Krokodil River, and then passes in under a series of rocks 

 newer than those above briefly described. It probably forms the 

 low country " below the berg," or rather perhaps the flank of the 

 mountains to the north, and sweeps round by the Olifant's River, — 

 at any rate granite has been observed far away to the northward. 

 " Beyond the Limpopo both Jeppe's and Baines's maps indicate 

 ^ Granite ' up the Bubye River, and the latter portrays a ' high 



Q. J. G. S. No. 164. 2 s 



