$(1,500) $(1,250) $(1,000) $(750) $(500) $(250) $0 $250 $500
0
2.5
5
7.5
10
12.5
15
17.5
20
Recovery
Difference,
%
Sensitivity
Analysis
-
NPVD
vs.
Recovery
Difference
$(750) $(500) $(250) $0 $250 $500
0
1
2
3
4
5
6
SS
Grade,
%
Sensitivity
Analysis
-
NPVD
vs.
SS
Grade
$(1,000) $(750) $(500) $(250) $0 $250
0
1
2
3
4
5
6
7
8
9
10
CO3/SS
Ratio
Sensitivity
Analysis
-
NPVD
vs.
CO3/SS
Ratio
$(700) $(600) $(500) $(400) $(300) $(200) $(100)
$0
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000
Gold
Price,
USD/oz
Sensitivity
Analysis
-
NPVD
vs.
Gold
Price
$(5,000) $(4,000) $(3,000) $(2,000) $(1,000) $0 $1,000
0
5
10
15
20
25
30
Gold
Grade,
g/t
Sensitivity
Analysis
-
NPVD
vs.
Gold
Grade
$(600) $(500) $(400) $(300) $(200) $(100) $0
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
Fuel
Price,
USD/L
Sensitivity
Analysis
-
NPVD
vs.
Fuel
Price
(a)
(b)
(c)
(d)
(e)
(f)
Figure
1.
Sensitivity
analysis
for
the
five
key
variables
(a)
SS
grade
(b)
CO
3
to
SS
ratio
(c)
recovery
difference
-
acidic
-
alkaline
POX
(d)
gold
price
(e)
gold
grade
(f)
fuel
price
6
NPV Impact, M USD NPV Impact, M USD
NP V Impact, M USD NPV Impact, M USD
NPV Impact, M USD
NPV Impact, M USD