In the western face a small “horse’ T of mudstone, 18 inches wide, 
-occurs, the main portion of the lode resting on the footwall. Traversing 
the “horse’’ there are thin veins of antimony oxide. From wall to wall 
the lode is 2 feet 1 inch in width. 
In the eastern face the lode is 18 inches wide, and has a more per¬ 
manent appearance. Samples taken from these faces are submitted for 
assay. 1 The origin of this lode is unquestionably due to an extensive 
east and west fault line, and, from the appearance of the walls of the 
fissure, I am inclined to think that the downward displacement o>f the 
rock mass on the northern side will not exceed a few feet, possibly not 
more than 15 to 20 feet, but as there is more or less curving in the fault 
plane, a series of lenticular deposits, alternating with narrower veins, is 
seen. 
There is but little doubt that this fissure will continue to' a very con¬ 
siderable depth, but whether the antimony ore will be found in payable 
quantities can only be determined bv actual test. 
I am satisfied, however, that the locality has sufficiently good prospects 
to. warrant an exhaustive trial being-made. Bulk assays of not less than 
half-arton each will give the best results in such work. 
[Report sent in 2g./.o^.~\ 
ORTHOCLASE FELSPAR AND CASSITERITE IN THE 
PARISH OF T ALL AN GALEOOK, COUNTY OF DELATITE. 
By A. M. Howitt . 
Orthoclase. 
The rock in the vicinity of the massive orthoclase is a granite com¬ 
posed of quartz, orthoclase and biotite, in which are some large orthoclase 
crystals with small included .flakes of mica. The sample of massive 
orthoclase forwarded to the Department (No. 205) is from the surface, 
and has been somewhat discoloured by exposure to the weather and to 
bush fires. 
The surface soil obscures the granite, and only loose samples of mas¬ 
sive orthoclase can be seen, but I have no doubt that a considerable 
quantity occurs, either as a lenticular patch of massive orthoclase, or as 
a coarse crystalline dyke in the granite. The . outcrop is 8 miles north 
of the Maindample Railway Station. The road is fairly good, and after 
passing the Glen Gap has a down grade the whole way. Timber and 
water are plentiful. 
The following report on the sample was made by Mr. P. G. W. 
Bayly, of the departmental laboratory : — 
No analysis was made of this sample. It is a massive formation, 
white to dirtv brown in colour. Five tests were made to determine its 
J 
utility with respect to pottery work. At a temperature of about 1,400 
deg. C. it fused down entirelv to a fine white opaque mass. The various 
(]) The following are the results of the assays :— 
Average sample, west face, bottom level. Mudstone showing a little antimony oxide Gold, per 
ton, 6 dwts. 8 grs. ; silver, trace ; antimony, 2.2per cent. 
Same positi n, material on footwall:—Gold, per ton, 8 dwts. 19 grs.; silver, 2 dwts. 8 grs 
antimony, 8.64 per cent. 
Average sample from east face :-Gold, trace ; silver, nil ; antimony, nil. 
