So far as the present information goes, the anticline 575 feet from 
the shaft appears to be the main axis, and good work would be done by 
boring below the level of the crosscut in centre country. A* rise might be 
useful, but on the whole it would be far preferable to test the beds at 
a lower level, as they would all be new country, and the beds so far 
disclosed appear to belong to the Castlemaine zone and a rise would be 
in them only. 
j 
[Report sent in 27.5.07]. 
The Sebastopol Plateau No. i Mine. 
At the Sebastopol Plateau No. 1 mine, an alluvial lead was formerly 
worked, and in the course of removing the auriferous wash, gold-bearing 
quartz was discovered, and the mine has since been worked for quartz. 
The lower levels are filled with water. 
At the 200-ft. level, a crosscut has been run out easterly for 260 feet. 
The country dips west at the shaft; at 30 feet east from the shaft an 
anticline occurs and at 50 feet east of the shaft an east “ leg ” has been 
worked. The quartz is 2 inches thick, and it has been stoped down to 
the 280-ft. level. From centre country on the anticline to the end of the 
east crosscut the country dips east. 
At the 280-ft. level the counry dips west from the shaft for 70 feet 
in the west crosscut, and there a syncline occurs. This syncline pitches 
north at 8 deg. Along the syncline a body of richly auriferous quartz 
that appears to have been af trough reef was worked in a southerly direction 
for 700 feet to the boundary of the lease. The east leg of the trough 
reef was: worked for 30 feet above the level. Spurs of barren quartz also 
occurred along the course of the svncline. Mr. Johnson, the manager, 
informed me that 100 tons of the quartz from the trough reef - yielded at 
the rate of 8 ozs. of gold per ton. 
At the 378-ft. level, in the crosscut west from the shaft, the beds dip- 
west for 70 feet. At this distance a syncline occurs pitching north at 
8 deg. The level is driven for 200 feet south of the crosscut along the 
west leg of the trough reef. The quartz is from 6 to 18 inches thick, and 
through it copper pyrites is freely disseminated in pieces up to an inch and 
more across. Galena and zinc-blende are also present, but only traces of 
gold. Northward the level has been continued for 1,460 feet without 
cutting payable gold-bearing quartz. 
It is evident that in this mine the slates and sandstones of 
Ordovician age are bent over anticlinal and synclinal axes in the same 
manner as at Bendigo. Auriferous quartz reefs occur along the anticline 
and the syncline. In the 200-ft. level a “leg” on the east side of the 
anticline was worked down h> the 280-ft. level. In the 280-ft. level, 
a trough reef was worked along the syncline with profitable results. Still 
lower down in the 378-ft. level, another trough reef has been prospected, 
but it is not profitable to work. Even to this shallow depth the ground 
has not been thoroughly explored. The shaft is sunk to over 1,000 feet, 
and very little prospecting has been done. 
To test the value of this mine, winzes should be sunk in centre country, 
both in the anticline and in the syncline. The shaft should be also 
deepened. and crosscuts made east and west for the purpose of locating 
the anticline and syncline. 
[Report sent in 5 . 70 . 07 .] ' 
