104 
for tin are likely to continue, it is difficult to prognosticate; but from the 
heavy decline in output in some of the chief sources of the world’s supply 
of this metal, the probabilities appear to be in favour of the price con¬ 
tinuing very high for some considerable time to come. 
\_Re-port sent in 4th January , 1906.] 
TIN ORE AT GLEN WILLS. 
(NO. 12 ON LOCALITY MAP.) 
By E. J. Dunn , F.G.S., Director , Geological Survey. 
A belt of metamorphic rocks occurs at Glen Wills, extending to the east 
for a width of about 2 miles, and to the west for about \ mile. This belt 
passes Sunnyside and extends northward for many miles along the granite 
boundary. The rocks appear to be part of the Silurian series which has 
been metamorphosed, and they are pierced in many places by pegmatite 
dykes of most irregular form. These dykes carry cassiterite, the discovery 
of which was the cause of the first opening up of Glen Wills. Considerable 
sums of money w r ere expended, and costly plants erected to work some of 
the stanniferous dykes, but the results were unsatisfactory, and no attempt 
was made to further test the value of the dykes as producers of tin ore 
until quite recently. 
An attempt to work one of the dykes is being made by a small party, 
at a locality about 2 miles to the north of Sunnyside on the Tallangatta 
road. The workings are about 6 chains to the east of the road, on the 
bank of a small tributary of Wombat Creek. At the surface the dyke 
can be traced for a length of about 3 chains. This spot is about 700 feet 
higher than Glen Wills. The claim is being worked by means of a tail 
race, and an excavation about 70 feet by 20 to 40 feet wide, and 15 feet 
deep. At the time of my visit the cleaning up had not taken place. 
Cassiterite appears to be disseminated throughout the pegmatite rock in 
greater or less quantities, but whether it is sufficiently abundant to be re¬ 
munerative, even by sluicing off the decomposed portion, remains to be 
proved. 
Sm/CfoF S £/?//<£ or SC/Z/S , 
S. 30°£. S £■ 
Section exposed in Tetu and Party’s Claim, 2 miles north of Sunnyside. 
Scale, 10 ft. to i in. 
