77 
At present the ore is too scattered in the hornblende-diorite to be of 
much value, and there is no lode or vein of ore similar to that occurring at 
the Thomson River Copper and Platinum mine, although the diorite is of 
a like character. It is possible that by further prospecting an ore vein may 
be found as a contact vein, or a vein in the metalliferous portion of the 
diorite. The asbestos is too small to be of value, but larger veins may be 
found. The assays show that the values of gold, silver, and copper are 
very low, but the platinum values are more promising. 
Further work should be done from the lowest workings, and the western 
contact between the Silurian strata and the diorite should be prospected 
opposite the known ore-bearing area to prove whether a contact ore vein 
occurs. 
Later on a boring scheme might be advisable. 
[28.9.12.] 
A POST-TERTIARY FAULT AT BEECHWORTIL. 
By E. J. Dunn, F.G.S., late Director , Geological Survey . 
In the Rocky Mountain Sluicing company’s lease, at the upper end of 
Spring Creek, a remarkable fault is disclosed where the alluvial deposits 
have been stripped down to the bedrock. The fault cuts through granite, 
altered Ordovician beds, and Newer Pliocene deposits of clay, gravel, and 
auriferous wash-dirt. Its strike 
is N. 40° E., and it dips south¬ 
easterly at 45°. The uplift is on 
the south side of the fault, and it 
amounts to about 18 to 20 feet 
vertically, as the same bed of 
washdirt is about that much 
higher on the one side of the 
fault than on the other. 
This same fault continues in 
a westerly direction as far as the 
Two Mile; how much further is 
not known. At the Two Mile it 
is exposed in Collins’ old claim, and 
is traceable for over 1 mile easterly 
from that site along the course of 
the old (Newer Pliocene) lead 
that has been worked on the 
north side of the Three Mile-road to Pennyweight Flat. The fault runs so 
persistently along the lead for this distance as to suggest that possibly a 
fault was followed by the water-course that deposited the auriferous wash- 
dirt, and that a further movement subsequently cut through the wash- 
dirt. A section through Collins’ claim is shown in a map of Beechworth, 
prepared by me in 1871, but it was not then known that the fault was 
the cause of the peculiar conditions shown. 
S u r As no 
Fig. 33.—Section through Fault. 
Scale, 40 feet to 1 inch. 
