9 
been worked northwards down the dip and pitch. The lode contains dense 
siliceous granitic veins tiaversed by very small veins of clear vitreous quartz. 
I was informed that, for a time, the lode was worked at a profit. 
Between the Sugarloaf Hill and Mafeking, in Ferny Creek, quartz veins 
with granitic matter occur along a movement plane in granodiorite. A little 
work has been done, and the veins are stated to be auriferous. The lode 
is about 1 foot thick ; on the foot wall there is 4 inches of fairly solid quartz, 
and the rest consists of granitic matter and some quartz, with vughs which 
contain quartz crystals. The strike is north and south, and the dip is east 
at 60°. 
At Mafeking, gold has been obtained in veins in the granodiorite, but 
these occurrences have not been inspected by the writer. 
Payable gold has been obtained at Stony Creek, Hall’s Gap, in the 
alluvium resting on granodiorite. Unfortunately, very little of the grano¬ 
diorite can be seen, as it is covered by old workings, and at the dredge by 
water. I was informed by Mr. F. D’Alton, the discoverer of the field, that 
the granodiorite is intersected by a small “clay seam” which is regarded 
as having been the source of some of the gold obtained. Mr. D’Alton showed 
me an interesting sample of wire gold, and some gold in small octahedral 
crystals. 
The probable source of the small amount of alluvial gold which is said to 
have been obtained at the Wartook Reservoir, is not known to the writer. 
Rose’s Gap was not visited, but it is reported by Mr. G. Carter, of Rosebrook 
Station, that “ granite ” exists there, and that gold is obtained in dish 
prospects on the side of the range. It seems strange that no gold has been 
obtained at the large area of igneous rocks in the Victoria Valley, north of 
Dunkeld ; an inspection would show whether the rock is granodiorite, and if 
any prospecting has been done. 
Minerals. 
At Mount William goldfield numbers of quartz crystals are found in the 
wash; some are much waterworn, others are sharp and angular, some are clear 
and without colour, and others are almost black. A number of amethystine 
crystals, some beautifully coloured, were presented to the Geological Survey 
Museum by Mr. W. Browning, of the Prospector’s Claim, Mafeking. The 
miners consider the amethysts have been derived from the granodiorite of 
the field, and, as they occur with the best gold the point is interesting. 
Amethystine quartz crystals were obtained from veins in the Grampian 
sandstones, in the vicinity of igneous intrusions at the Wartook Reservoir. 
At Mount William, molybdenite occurs as splashes coating joint planes 
in the granodiorite, and is generally accompanied with a few crystals of iron 
pyrite. Nothing like a lode of it was noted. 
Specular iron ore, or micaceous haematite, was collected on the old road 
from Wartook to Rosebrook near an old shaft about 3 miles from the Wartook 
Reservoir. A vein about 1 foot thick occurs in the Grampian sandstones 
near their junction with granodiorite. There are other small deposits of the 
mineral, but it does not appear to exist in commercial quantity. 
I desire to acknowledge much assistance in my work by the Messrs. J. F. 
and C. D’Alton, of Hall’s Gap, and by Mr. G. Carter, of Rosebrook. 
[24.2.13.] 
