SOUTH OF REDRUTH AND CAMBORNE, ETC. 



643 



Where the granite protrudes into the killas the lode may leave 

 the junction and have granite or altered granite on both sides. 



At South Cam Brea mine, west of Wheal Uny, the same lode was 

 followed down for a depth of 175 fathoms, mainly between the gra- 

 nite and the killas, with the same general features. There was this 

 difference, however, the narrow " leader " became a copper-lode 

 2 to 4 feet wide, thus : — 



Eig. 3. — Section of Lode at South Cam Brea. 



N. S. 



SCcdeih j#i2ic?i=2.JFoot. 



s ao sz 



A. Copper-lode. B, C. More or less stanniferous schorl-rock, 

 E. Capel (schorl-rock derived from killas). F. Killas. 



i. e. lode and capel. 

 Oc. Granite. 



This mine has been therefore worked both for tin and copper. 

 The outcrop of the Great Mat Lode may be seen a little to the south 

 of the castle on Cam Brea. 



The course of the lode was generally about E. 33° N., though it made 

 a bend in one place and had a strike E. 15° 1ST. 



The dip is about 35°. 



West Wheal Basset. — This mine was originally started to work a 

 copper-lode dipping north ; but eventually the Great Elat Lode was in- 

 tersected, and it is to this vein that the mine is now indebted for the 

 greater part of its produce. The lode is now entirely in granite, 

 and the accompanying section (fig. 4) of the workings above the 

 104-fathoms level will explain its character. 



Often you may have nothing but non-stanniferous rock {capel) 

 below the leader and lode above it ; and very frequently the leader is 

 reduced to a mere ferruginous joint. In one part of the mine, viz. 

 at the 140-fathoms level, the lode and capel are 40 or 50 feet wide 

 altogether, and the whole of the stuff is more or less tin-bearing. 



South Wheal Frances. — The Great Elat Lode dips into this mine 

 from West Basset, and was first intersected at the 185-fathoms level ; 

 it is now known also at the 205. The workings at present are not 

 extensive, though decidedly productive ; for the rock is yielding 2| 

 per cent, of tin ore (60 lbs. to the ton of stuff). The average dip is 

 32°, and the course, as far as at present determined, is E. 41° N. A 



