10 
t>. Analysis of Stawell sandstone collected by the Director of the 
Geological Survey (1907.) A finer-grained variety than A 
and from a greater depth. 
C. Analysis of light coloured, felspathic dyke-stone from the 
Crown Cross United Mine, Stawell. Contains in addi¬ 
tion traces of MnO and Li^O. This material was tested 
as a slip. It fuses at a sufficiently low temperature for 
this purpose, but the glaze formed is dirty in colour. If 
a purer variety free from iron were available it would 
have a commercial value. 
[Report sent in 4.6.07.'] 
THE PORT ARTHUR AND OLD HALL MINES, 
PIGGOREET, NEAR SCARSDALE. 
By E. J. Dunn , F.G.S., Director , Geological Survey. 
The Port Arthur Mine. 
The Port Arthur mine is in the same valley as the Old Hall mine and 
a few hundred yards to the S. of it. The shaft is 210 feet deep, and there 
are levels at 43 feet, 100 feet, and 210 feet. The levels are extended both 
N. and S. of the shaft. The strike of the reef is about N. and S., dip 
68 deg. W. ; the strike of the country rock is N. 5 deg. E., dip 78 deg. E. ; 
so that this reef nearly coincides in strike with the strike of the country, 
but dips in the opposite direction. The country consists of dark slates and 
sandstones that are not much disturbed and nearly free from faults. 
At the time of my visit new hauling gear was being erected and the 
bottom level was filled with water. The 100-ft. level was inspected. 
Southward the level is extended 286 feet, and northward 720 feet. About 
no feet N. of the shaft a shoot of stone has been worked which is stated 
by the manager, Mr. Bourke, to have been 6 feet wide. 
About 200 feet further N. there is a cross reef with a little gold in it. 
A winze 65 feet deep has been sunk here on a good reef showing payable 
gold to the bottom and dipping 83 deg. to the W. 
About 480 feet in, the reef is 8 feet wide and said to be worth about 
42 dwts. of gold per ton. The shoot of gold here is about 140 feet long. 
At 520 feet N. a winze is sunk 25 feet deep in the reef all the way. 
At 665 feet N. the reef has been stoped for 40 feet N. and 120 feet S. 
At the end of the level (720 feet) the reef is 4 ft. 6 in. thick, and is said 
to be worth 5 dwts. of gold per ton. The strike of the reef is N. 6 deg. 
E., dip 83 deg. W. The average width of the reef in the level S. of the 
shaft is about 20 inches. 
So far as the workings examined are a guide, this mine presents very 
favorable appearances. The country rock is excellent and not much dis¬ 
turbed. The reef is a large one and appears to be of a permanent charac¬ 
ter, and it carries gold in shoots for a considerable portion of its length. 
The conditions are such as to warrant vigorous sinking to prove the ground 
at lower levels. 
The South Port Arthur mine is a short distance away from the above 
mine, and the North Port Arthur mine in N. of Piggoreet township, and 
sinking on what is considered to be the northward extension of the Port 
Arthur line of reef. Still further N. is the Port Arthur Consols mine. 
