172 
THE CHEWTON GOLD MINES (FORMERLY THE FOREST 
CREEK GOLD REEFS), CHEWTON. 
By E. J. Dunn , F.G.S., Director , Geological Survey. 
No. ii level is 760 feet from the surface. In the western cross-cut 
and 30 feet from the shaft an anticlinal fold occurs in slate. At 50 
feet from the shaft is the fault along which the principal reef has formed. 
Below the fault the country dips east, and quartz spurs are present. 
A level was driven along the reef northwards for 300 feet from the cross¬ 
cut in search of the payable shoot of stone worked in the level above on 
the same line of fault. In the face at the north end of the level the 
reef is 2 to 3 feet thick, but no payable quartz was discovered. At the 
north end of the north level the country pitches northward at 11 deg. 
The country is the usual alternation of slate and sandstone beds. The 
south level at No. 11 level is driven 190 feet. 
No. 12 level is 846 feet from the surface. A level is driven north¬ 
wards for 125 feet. At the plat the slate and sandstone dip W. 80 deg., 
and quartz spurs are present. At no feet from the shaft there is a 
body of quartz 6 feet thick on the same fault as was opened up at No. 
11 level, and which was productive at No. 10 level. The east or hang¬ 
ing wall dips E. at 55 deg. There is much black slate mixed with the 
quartz; iron pyrites is abundant, and seme galena and zinc blende also 
occur in the quartz. Trial crushings gave about 2 dwts. of gold per ton 
of quartz. The pitch of the country and of the quartz is S. 18 deg. 
At the shaft a flat spur 9 inches thick is met with. 
In the eastern cross-cut the fault and reef are met with at 20 feet 
from the shaft, and the east wall at 22 feet. From this cross-cut a level 
is driven south for 94 feet. In the south face the reef is 6 to 7 feet 
thick with about 1 dwt. of gold per ton of quartz. The pitch is south¬ 
wards at about 18 deg. 
This mine as previously described is in the Castlemaine zone, and the 
gold occurrences are likely to be most irregular while mining is con¬ 
tinued in that zone, but lower down there is a probability that the reefs 
will become more productive, and for that reason the advice was given 
that any further operations should be in the direction of sinking the shaft. 
It is certain that below the beds in which mining has so far been carried 
on the more productive Bendigo zone exists, but there is not sufficient 
data available to definitely state at what depth this zone would be entered. 
Even in the lower portion of the Castlemaine zone the rocks are more 
productive of gold than higher up, and the advice previously tendered, 
i.e., to sink the shaft deeper, can only be repeated. 
[.Report sent in p.7.08.] 
THE SOUTH EUREKA MINE, FRYERSTOWN, NEAR 
CASTLEMAINE. 
By E. J. Dunn , F.G.S ., Director, Geological Survey. 
This mine lies in a direction a little west of north* from Fryerstown, and 
is 2 miles distant from that place. The country rock is Ordovician, and the 
beds are folded into a series of ridges and troughs. At the South Eureka 
mine the rocks appear to be well up in the Castlemaine zone. 
A shaft has been sunk 245 feet. At the 145-ft. level there is a cross¬ 
cut driven east for 30 feet, and a quartz reef 1 foot thick occurs at the end 
of it. Along this reef (a leg) a level has been extended northwards for 
