167 
The reef was cut at the 340-ft. level in the west cross-cut 90 feet from 
the shaft; it clips 71 cleg. W., and pitches 18 deg. N. There is some 
quartz in the channel where cut, but it rapidly expands northward and 
develops into a very large quartz reef north of the shaft. 
The great amount of work done on this body of auriferous quartz 
in the early days is good proof that a valuable reef has been worked down 
to this level. The reef is continuing its course below the present workings. 
It is necessary to 1 sink another 60 feet, and then to cross-cut and drive 
along the course of the reef at the 470-ft. level. This work should be 
undertaken, as it is the proper method of developing the mine. The 
manager (Mr. Samuels) informs me that in the quartz left standing there 
are considerable quantities of ore that would yield 2 clwt. of gold per 
ton; a little more than this could be made profitable, and with such large 
bodies of quartz and the certainty that the same quality of stone as 
worked before would pay handsomely now, there is every inducement for 
doing the necessary development work to test the reef at the lower level. 
[Report sent in 28.6.09.] 
THE LANGDON MINE, KANGAROO GULLY, BENDIGO. 
By E. J. Dunn , F.G.S., Director , Geological Survey. 
This mine is situate about 4 miles south from Bendigo. The rocks 
are of Ordovician age, and apparently well up in the series, or, perhaps, 
in the lower portion of the Castlemaine zone. 
The shaft is sunk to a depth of 320 feet, and at 290 feet a crosscut 
is driven east for 195 feet. At the shaft the grey sandstones and slates 
dip east, and at 75 feet in the cross-cut a reef was cut that conforms to 
the bedding planes (a leg); it is from 1 foot to 2 feet thick. From this 
point a level has been driven northward for 75 feet, and in the face the 
quartz, which is laminated, is 6 inches thick, and dips 54 deg. to the east. 
At the cross-cut there is no pitch, but further along this level the pitch is 
northward at about 5 deg. The south level has been driven for 233 feet 
on a reef from 2 to 3 feet thick. Overhead, the quartz has been stoped 
for 50 feet part of the way and for the rest right up to the surface. In 
the face at the south end of the level the quartz is about 8 inches thick 
with spurs in the footwall. The dip is to the east and the pitch is 
from 8 deg. to 10 deg. to the south. This reef is the west leg of a 
syncline reef or trough reef, therefore the saddle reef is at the bottom, 
and the two legs point towards the surface. 
At 105 feet from the shaft, in the crosscut, another thin 11 leg ” of 
quartz, about 3 inches thick, is cut. The reef is laminated, and dips east at 
45 d e £* 1 R is in black slate. At 175 feet in the east cross-cut the third reef 
is intersected. The quartz is from 12 to 18 inches thick, and in this 
case the cross-cut is just below the trough reef which turns up eastward, 
the dip both of the reef and the country rock being to the west. The 
westerly clip continues to the end of the crosscut. This mine was begun 
about two years ago, and since then a compact winding plant, and a 
10-head crushing plant have been erected and paid for out of the gold 
won. 
