105 
°^tained bismuth ore, and gold equal to about 4 or 5 dwt. to the ton, in one of these 
in a decomposed rock containing hornblende. He adds that it is free from 
“magnetite, and will dress-up to 15 per cent, of bismuth, and probably 3 or 4 oz. of 
Sold to the ton. 
j “A shaft, 42 feet in depth, has been sunk about 30 feet from Ho. 1 Cutting. 
parsed through — first, a decomposed rock with lumps of native bismuth and carbonate 
° bismuth ; next through a siliceous rock containing a large amount of arsenical 
Pytitcs ; then through 25 feet of calcite; and lastly through solid magnetite. 
“The qdan adopted for concentrating the ore is to first pass it through a half-inch 
Screen; the coarser portion is afterwards hand-picked. All that goes through the 
fereejj fg carted to a Cornish jigger, and put through with a mesh of 25 holes to the 
Whatever passes through the jigger is then ‘ forked’ in a .streaming-box. By 
ha'* '^^^bod about 1 ton of concentrates is obtained from 20 tons of dirt. The manager 
found streaming to answer much better than sluicing, as much less water is used, 
much less of the finer bismuth ore is lost. 
“With reference to the origin of the deposit, it is an irregular deposit. Its 
H'Ct limits are not well defined, as the surface is covered with soil and large boulders of 
_^gnetite, which first drew the prospector’s attention to it ; but it is somewhat semi- 
in shape. 
“ The deposit in question extends but a short distance in any direction ; its 
latest length is under 400 feet, and its greatest breadth about 150 feet. It certainly 
g in the form of a bed. I am of opinion that the iron came up from below in 
it perhaps as hydrated oxide; that it was precipitated as peroxide of iron, and that 
^^Was subsequently changed into magnetite — ferrous oxide and sesquioxide of iron — at 
viz^ when the surrounding rocks were altered ; the calcite and other minerals — 
Uu ' bismuth, manganese, and cobalt ores — being deposited subsequently in the 
'®®i'ous cavities in the magnetite. 
j.j. . , . difficult, at present, to say much as to the commercial value of the deposit, 
pre* worked as a bismuth mine pure and simple. As far as the workings have at 
tak*^*^r S®*!® they are mere scratehings on the surface, and the bismuth ores are only 
fo h" * pockets’ or cavities in the magnetite, and several tons of material have 
6 removed to obtain 1 ton of the ‘ dirt,’ and 20 tons of this have to be concentrated 
containing about 10 per cent, of bismuth, worth £5 12s. per unit, or 
tom 
£55 per ton. Mr. Koberts, the manager, reports that during October about 100 
cqj, have been raised and treated for a yield of rather more than 5 tons of 
centrates, averaging 10 per cent, of bismuth, 
the difficulty of separating the bismuth ore from the magnetite greatly limits 
fiuantity of stone that can be treated.” 
GEBANGLE. 
^eba reefs, among which arc the Mount Allen, Victoria, Lady Frances, 
bloim?'^ Pride of Gebangle, Lord Nelson, Just-in-Time, Mount Toohey, Morning Star, 
kloui't^T^-'^ Pound, and Grecian Bend, are described by Mr. Bands in his “ Eoport on 
®dicoo ^Sgenden, &c.” The field was opened in 1888. The country-rock varies from 
porpj^'^* ^•^‘^'tes and greywacke to a “bedded volcanic agglomerate,” granite and 
The 
BROVINIA. 
It was, 
aowe-v ®^'stence of gold in this locality has been known for many years. 
er, only in 1886 that the reward was claimed for the discovery of payable gold. 
