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MINES ANO METALS
WILUNA GOLD MINES.
THE AUGUST YIELD.
Development Values.
The Wiluna Gold Alines, Ltd., report
that. 28,437 tons of ore were treated in
August for a yield of 8,355oz., which, at
an estimated value of 117/ ner oz_. is
worth £4?,883 sterling and £60,737 in
Australian currency. Working costs
amounted to £30,29#, or 21/3.67 a ton.
The working surplns is estimated at
£30,413, Australian currency. Expenditure
on construction was £6,941, and on ad
ranee development and stope preparation,
£9,420.
Development exposure in gold values,
calculated at 85/ per fine oz., is as fol
low: —
East Lode. — 625ft level: Crosscut at 1,400ft
south exposed ore valued at 43/ over a -width
of 10ft. Crosscut at 1,450ft. south exposed
ore valued at 31/ ever a width of 9ft. Cross
cut at 148ft. north exposed ore valued at 18/3
over a width of 20ft. SOOft. level: Crosscut
at 1,201ft. south exposed ore valued at 35/0
over a width of 22ft. Crosscut at 1,251ft.
south exposed ore valued at 27/ over a width
of 10ft.
West Lode. — 800ft level: Borehole at 55.4ft
north exposed ore valued at 46/ over a width
of 22ft
No. 2 West Lode. — »50ft. level: Crosscut at
902ft north exposed ore valued at 23/ over
a width of 4ft 625ft level: Borehole at
726ft north exposed ore valued at 22/9 ovtr
a width of 4ft 800ft. level: Crosscut at
554ft. north exposed ore valued at 23/ over
a width of 14ft
Construction. — Building extensions to accom
modate additions to the power plant were com
pleted during the month and also the founda
tions for the two Diesel engines on order.
Treatment — During the past few months a
slight but steady increase in the percentage
extraction has taken place. Experiments in
August with new flotation reagents have been
especially encouraging. While these do not
affect the lecovery on oxidised ores, the effect
on pure sulphide ores is very marked and in
the opinion of the manager should result in
an important improvement later when treating
only this class of ore.
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