756 THE TIN-DEPOSITS OF NEW ENGLAND, N.S.W., I., 



with that observed by Professor David for the Emmaville 

 District. The mean of fifty-four lodes was a bearini^ of 

 N. 39° 15' E,, and the average bearing for the richest lodes was 

 N. 35" E. From the data in Professor David's book, I have 

 tabulated a list (Table v.) of the bearings of the veins at Emma- 

 ville. A comparison of this table with that of the Elsmore 

 veins, shows a striking resemblance. It would seem that the 

 same system of forces was common to both areas. Even con- 

 siderably to the north of Emmaville the fracture-system preserves 

 its direction. Speaking of the disposition of the veins at Stan- 

 thorpe, as compared with those at Emmaville, Mr. Skertchley* 

 observes: — "Hundreds of similar cases occur in the district. 

 . . . . Their direction is always within a few degrees of 

 north-east and south-west." 



It is reasonable to suppose, and the assumption is based upon 

 experience in the area here considered, that mining-towns have 

 grown up upon those portions of the field where the ore-deposits 

 are most abundant. If a line be drawn from Stanthorpe to 

 Tingha, it is found to pass about 4 miles west of Emmaville, and 

 midway between Elsmore and Newstead. Thus this line, which 

 is about 100 miles in length, passes through the middle of each 

 tin-mining centre. The bearing of this line is about 28° east of 

 north. Thus it is evident that the general trend of the tin- 

 bearing country approximates closely with its system of fractures. 

 That there is very probably a genetic relation between these two 

 directions, is indicated by the fact that the same close corres- 

 pondence has been observed in the tin-deposits of Cornwall. 

 With regard to these Cornish lodes, Moissenef^ has written : — 

 " Of 292 lodes registered by Mr. Henwood, the angle of 40° 

 contained between E.W. and E. 40° IST , includes 177, i.e., 60 p.c. 

 are contained in a range of 22 per cent, of the circle. ... 

 The E.N.E. direction which generally prevails for the lodes is 

 also that of the great metalliferous zone distinguished by Capt. 

 Chas. Thomas, who remarked that the profitable mines were all 



* Loc. cit. 



