1918.] The N.Z. Journal of Science and Technology. 15 
the Federation Claim, a short adit has been driven to, but not across, a zone 
of silicified country that represents the lode. Along the bed of Dead Horse 
Creek the schists are concealed by debris, but the occurrence of alluvial 
gold below the supposed crossing-point of the lode, and the fa:t that 
fragments of scheelite-bearing quartz are found in the slope deposit on the 
hillside to the south of the stream, strongly suggest that the lode continues 
still farther southward. 
At the time of the writer’s visit Mr. George Humphries, on behalf of the 
Deep Creek Gold-mining Syndicate, was prospecting a scheelite-bearing 
lode occurring in the basin of Deep Creek, and this may be on the same 
fracture zone as the Empire City and Golden Bar shoots. In the valley 
of Mountain Camp Creek, a stream entering the Wakamarina from the east¬ 
ward rather less than a mile and a half north of the mouth of Deep Creek, 
a lode, stated to be parallel with that worked by the Dominion Consolidated 
Developing Company, is being prospected by the Mountain Camp Syndicate 
(Alford and others). The writer had no opportunity of examining this 
or the Deep Creek Gold-mining Syndicate’s property. 
Genesis of the Ore. 
A number of facts bearing on the genesis of the ore have already been 
brought out, and others which relate to this question may now be stated. 
The distribution of the ore—that is, vein material “ sufficiently valuable 
to be of interest to the miner —-is dependent on the topography. It is 
nowhere known to occur beneath a stream-channel. Thus the ore-body 
of the Empire City Claim, which traverses a definite ridge, is separated 
from that in the Golden Bar Claim by an inconsiderable valley beneath 
which the lode fissure is not known to carry ore. The Golden Bar ore- 
body which cuts obliquely across the steep face of a ridge continues south¬ 
ward to within a few chains of Dead Horse Creek. At this point, in the 
Federation adit, it was found to have degenerated to a zone of silicificatiom 
The continuation of the lode fissure northward from the Empire City is 
reported to be represented in a gorge on the Wakamarina Biver by a crush- 
zone traversed by a few stringers and veinlets of quartz. Again thin 
inconstant veinlets of scheelite-bearing quartz occur in weathered but 
uncrushed schist at two points. These were observed in the rock by the 
roadside at the eastern end of the bridge across Deep Creek, and also about 
a mile farther west on the roadside near the bridge that crosses the Waka¬ 
marina to the sawmill at the mouth of All Nations Creek. In both cases 
the veinlets dip vertically and have a nearly north-and-south strike. They 
are probably segregations in joint-planes, with one set of which they are 
parallel. 
In the writer’s opinion the observed facts strongly suggest that the 
ore-body has been formed by the replacement of crushed rock in a fracture- 
zone by quartz, calcite, scheelite, pyrite, and gold derived from the general 
mass of the schist, and that the vein material has been brought to its 
present position by surface waters. 
The tungsten minerals, supposed to be distributed throughout, may 
well have been contained in the granitic rocks that furnished the detritus 
from which the schists and greywackes were derived,* and wolframite, 
probably the most abundant of the tungsten minerals, need not be regarded 
as difficultly soluble.]* 
* Cf . P. Marshall, The Geology of the Tuapeka District, N . Z . 0 . 8 . Bull . No . 19 , 
p. 47. 
t T. A. Rickard (editor). Mining and Scientific Press , vol. 114, No. 13, Mar. 31, 
1917, p. 431. 
