101 
®^inple taken from the outcrop yielded gold equal to about 2 oz. 12 dwt. 13 gr. to 
, ton, but a trial crushing of 31 cwt. yielded only 1 dwt., or a little over 21 dwt. to 
the ton. 
“ At the foot of this hill a small reef is being worked. It is from 2 to 10 inches 
^ide, consisting of quartz with a large percentage of the oxide of iron and manganese. 
t _the bottom of the shaft, in one place, there is a vein, 1 inch wide, consisting almost 
Entirely of pyrolusite (oxide of manganese). An assay from this roof gave 10 dwt. of 
Sold and 6 oz. of silver tier ton. It intersects a dyke of porphyry. The foot-wall is of 
dolerite. 
“ At Mount Ophir is a large reef of white translucent quartz, stained in patches 
^ith oxide of iron. It contains a good deal of molybdenite and specks of iroii pyrites. 
25 feet a hole was drilled into the reef ; the ddhris obtained from the hole, on being 
'gashed, gave a very good prospect indeed. The rock of which this — the northern — 
® of Mount Ophir consists is made of fine felspathic dust containing small and more 
ess rounded particles of a micro-crystalline felspathic rock. Pine gold is obtained 
orushing and washing pieces of this rock.”* 
Mr. Rands, in the Report above quoted, gives an account of the Old Chowey 
^oois and Stanton-Harcourt alluvial digging?, and of the Allendale, Hannan’s, Union, 
“oy Mary, and other silver lodes. The argentiferous load ores are associated with 
^^senical pyrites and zinc-blende. Mr. Rands observes : “ The amount of silver in 
Jodcs, as far as assays have at present shown, is small— only from 30 oz. to 
the ton, which of itself will not pay to work, especially with a narrow reef, 
g 1 ®^ contain some gold. In the Allendale, which is the only shaft well into the 
oj, ^ oi’o contains as much as 1 oz. of gold to the ton. In 1886, the amount of 
® ^^^sed Was 75 tons, valued at £1,350. In 1887 the return was nil." 
a later Report,! Mr. Rands says : — “ The deposit has been worked down to a 
'Was ^ feet, in the shape of a large square shaft about 40 feet across. This shaft 
P^^P^wdicular down to a depth of 140 feet, from which point it inclines to S. 
. and to E. at 7°. 
form former report on this mine, I said that the deposit was probably in the 
^ ‘ pipe,’ rather than a lode, and that the metallic minerals, and cementing 
fiss probably been deqmsited from solution in water which has come up through 
work since done bears out this opinion. 
^^nd ^50 feet the stone consisted of a breccia of fine-grained aluminous 
^'-’60us rocks cemented together with a hard cement of oxide of iron and silica, a 
®arth^ containing a fair percentage of oxide of bismuth, a brown iron ochre, and 
Pocket ^o^atite with siliceous veins through it ; and carbonate of bismuth in small 
^’ght 
At 50 feet in depth there was a large cavity filled in with a siliceous sinter, so 
keen would float in water. Numerous such cavities, but smaller in size, have 
^ct with at various depths 
a dentt, ^ kunnel has been driven into the deposit from the eastern slope of the hill, at 
to a n ■ from the summit. This tunnel was in slates and stratified mud-rock, 
Occur ^®®^ from the shaft, when the wall forming the boundary of the deposit 
Part l^J’ospects of gold can be got in this 100 feet, and it, or a 
’ probably be worked at some future time. 
ttanda. j> ”0 the Gold and Silver Deposits in the Neighbonrhood of Mount Shamrock. By W. H. 
t Authority ; 1880. 
Atitl,,,,;. ^ Mount Biggenden Bistnutli Mine, Gebangle, and the Mount Shamrock Mine. Brisbane : 
"'-y : 1890. 
