PLATINUM AND ITS ASSOCIATED METALS IN LODE MATERIAL. atl 
PLATINUM anp 1rs ASSOCIATED METALS 1x LODE 
MATERIAL at BROKEN HILL, N.S. WALES. 
By Joun C. H. MINGAYE, F.C.S., M.A.I.M.E., Analyst to the 
Department of Mines. | 
{ Read before the Chemical and Geological Section of the Royal Society of 
N.S. Wales, July 5, 1892. | 
THE presence of platinum and its associated metals in lode material 
at Broken Hill has been previously pointed out by me in a paper 
read before this Society entitled :—‘ Notes on some Minerals, &c.”* 
A large number of samples from the same district have since been 
examined for the presence of platinum, and in nearly every case 
was that metal detected, yielding from traces up to | oz. 9 dwts. 
per ton. 
Experiments were conducted at the Clyde Works, Granville, 
with a view of ascertaining if the platinum could be saved by 
concentration over the Frue Vanner. The results obtained how- 
ever, were not very satisfactory, as in the first place the platinum 
present was found to be very small. It was thought that enough 
metal probably would be obtained so as to determine in what state 
the platinum exists in the mineral. 
An average sample of dry crushed ore weighing 17 cwts. 2 qrs. 
when passed over the Frue Vanners yielded 66 tbs. of concentrates. 
The concentrates yielded, platinum 16 dwts. 17 gers. per ton. A 
second sample weighing 1 ton | cwt. yielded 26 lbs. of concentrates, 
which contained platinum 9 dwts 18 grs. per ton. 
The concentrates weighed very heavy, and a qualitative analysis 
was made with a view of ascertaining their composition. The 
following metals were detected—lead, zinc, antimony, arsenic, 
bismuth a trace, lime, magnesia etc., combined with sulphur and 
carbonic acid. 
* Journ. Roy. Soc. N.S. Wales, Vol. xxi11., 1889, p. 326. 
