142 ORIGIN AND DEVELOPMENT OF OEE-DEPOSITS. 



The most westerly working's are at Camborne Vean, where 

 the lode still proceeding to the westward enters hard ground 

 and is lost in a series of strings. Proceeding towards the east 

 the next workings are at Stray Park (now part of Dolcoath), 

 then the workings of Dolcoath proper, followed successively by 

 Cook's Kitchen, Tincroft (where it is known as Highburrow 

 lode), and Carn Brea, which is the most easterly mine on the 

 lode. 



My sketch of the leading characters of this great lode must 

 be merely a summary — the details of which must be filled in by 

 those who wish to pursue the subject by reference to the works 

 of Pryce,* Henwood,f Delabeche,;]: Capt. Charles Thomas, |j 

 Capt. Josiah Thomas.§ E. J. Frecheville^ — and above all by a 

 careful study of the reports and plans issued from time to the 

 shareholders of the respective mines In what follows reference 

 is principally made to that part of the lode which is situated 

 within the Dolcoath sett — only specially referring to the other 

 mines as occasion may arise. 



The bearing of the lode as a whole is not far from N.E., 

 that of the rich parts for copper above the 160 fathom level 

 between E.N.E. and East. The dip or underlie is southward, 

 in the upper part of the mine about 2 feet and in the lower part 

 4 feet in the fathom. At the surface was a fine gozzan from S 

 to 6 feet wide, extending down to the adit level, which is 

 about 28 fathoms below the surface ; this gozzan in places 

 contained a good deal of tin. Erom the adit to the 100 fathom level 

 it was moderately, and to the 160 very rich, for copper. Between 

 the 160 and 190 copper and tin occurred together. From the 

 190 fathom level to the present bottom of the mine, 410 fathoms 

 below adit, the mine has yielded tin only — the lower levels in the 

 tinny portions being on the whole much richer than those 

 yielding ores of copper. The productive portions of the lode 

 have been usually from 10 to 20 feet wide in the tinny parts, 

 and from 8 to 1 8 feet in the copper}^ parts. 



* Pryce, Mineralogia Gornuhiensis , Bullen Garden, &c. 

 fHenwood, Trans. Roy. Geol. Soc. Corn.. V. 

 JReport on the Geology of Cornwall and Devon. 

 ||Remarks on the Geology of Cornwall and Devon, 1859. 

 §Journ. Roy. Inst, of Corn., 1870. Report Min. Assoc, 1882. 

 '^Trans. Roy. Geol. Soc. Corn., x, p. 146, 



