120 
and 70 feet were sunk here. The quartz ranges from 2 inches to 12 inches 
thick; its strike is E. 10 deg. N. ; dip 70 deg. S- It carries sulphides 
of iron and shows free gold occasionally. The yields are stated to have 
been about | oz. of gold per ton. Mr. Kelly also sunk some shafts on 
some leaders carrying gold and intersecting granodiorite at about 10 chains 
north-east from the middle of German Gully, which runs in a southerly 
direction into Mason’s Gully. At about 50 feet from the surface the rock 
becomes hard, and unless the veins are rich they would scarcely pay to 
work in this hard rock. To the west of the head of Neild’s Gully a tunnel 
was driven northward for 1,000 feet to prospect the alluvial ground south¬ 
ward from the Engine Shaft. At the mouth of the tunnel there are joints 
in the hard granodiorite. The faces of these show in parts copper pyrites, 
molybdenite, and iron pyrites as thin films, and probably gold is also 
present. Some narrow quartz veins were opened up about 25 chains 
further southward and close to the west side of Neild’s Gully, near where 
it enters the northern boundary fences of the sold land. Another small 
vein has been opened up on Spion Kop at the head of Chirnside’s Gully, 
and one or two attempts have been made to work these small auriferous 
veins further westward; but so far none of them have proved successful, 
and they are for the most part so small that they could not be profitably 
worked unless they were rich in gold. Although the granodiorite extends 
for 3 miles further west than shown on the sketch map mentioned above, 
no gullies have been worked for gold over that area. The rock is very 
hard, and this may be the reason why such hard rock appears less pro¬ 
ductive of gold than the decomposed portion of the mass. Eastward of 
the productive area the hard granodiorite extends also over a wide tract, 
but no auriferous gullies have been worked there. Probably a considerable 
depth of the granodiorite has been removed to produce the gold deposited 
in the old lead, and this old lead has again been denuded, and, together 
with further gold derived from the veins in the granodiorite, has furnished 
the gold found in the recent gullies. It is quite possible that some of the 
conglomerite beds of the Grampian series may have furnished a little gold, 
but it is not likely to be of much consequence. The field is of consider¬ 
able interest, and it should be surveyed when an officer can be spared. 
There are other outcrops of granodiorite in the Grampians that may prove 
to be auriferous. The alluvial workings near Hall’s Gap is similar as 
regards the origin of the gold. 
{Report sent in 2g-4..ogG\ 
LORD NELSON NORTH MINE, ST. ARNAUD. 
By E. J. Dunn , F.G.S., Director , Geological Survey. 
This mine is situate about a quarter of a mile north from the post- 
office, and about 12 chains west from the Lord Nelson shaft. The out¬ 
crop of the reef worked in both these mines is about 500 feet east of 
the Lord Nelson North shaft, which is 2,150 feet deep. At the 1,830- 
ft. level the reef crosses the shaft and dips 75 deg. to the west. The 
strike of the reef is N. 30 deg. W. The slate and sandstone beds dip 
west about 80 deg. and strike the same as the reef. There is a cross¬ 
cut east 40 feet long to the boundary of the lease. On the course of 
the reef a level is driven north for 200 feet and south for 350 feet. At 
