882.pdf Ore Reserve and Resources With Metal Equivalent
882.pdf Ore Reserve and Resources With Metal Equivalent
882.pdf Ore Reserve and Resources With Metal Equivalent
Registered Office
P +61 2 9696 2900
F +61 2 9696 2901
Level 28
ASX Announcement
175 Liverpool Street
Sydney NSW 2022
www.evolutionmining.com.au
23 April 2013
Evolution Mining Limited (ASX: EVN) is pleased to report that it has completed an update to its Mineral Resource
and Ore Reserve estimates as at 31 December 2012.
Group Mineral Resources are now estimated at 7.7 million ounces gold equivalent, an increase of 10% compared to
the June 2012 estimate of 7.0 million ounces. This change is after accounting for depletion by mining and is due to a
significant increase at Pajingo (406koz) and increases at Edna May (101koz), Mt Rawdon (94koz) and Cracow
(73koz).
Group Ore Reserves are now estimated at 3.6 million ounces gold equivalent, an increase of 7% compared to the
June 2012 estimate of 3.3 million ounces. This change is after accounting for depletion by mining and is largely due
to increases at Pajingo (145koz) and Mt Rawdon (112koz).
The most significant increase achieved in both Mineral Resources and Ore Reserves is the result of new drilling
carried out in the 12 months to 31 December 2012. New geological interpretation and a rigorous reassessment of
Evolution’s very large drilling database, particularly at Pajingo, also added significant ounces to both Mineral
Resources and Ore Reserves. The commodity prices used for the resource and reserve update remain the same as
those used for the previous estimate. Similarly, there have not been material changes to the cut-off grades used to
estimate the Ore Reserves.
Resource definition drilling programs at all operations also resulted in a marked increase in Resource confidence
with the amount of gold equivalent in the Measured category increasing 20%, Indicated increasing by 12% and
Inferred consequently decreasing by 6%.
This resource and reserve update includes all exploration and resource definition drilling information up to 31
December 2012 and has been depleted for mining to 31 December 2012. Moving forward, the Group Mineral
Resource and Ore Reserve statement will be updated annually only, with a 31 December cut-off date.
The Mineral Resources and Ore Reserves have been prepared according to the Australasian Code for Reporting of
Exploration Results, Mineral Resources and Ore Reserves (2004 JORC Code). Mineral Resources are reported
inclusive of Ore Reserves.
Explanatory notes containing information on the parameters and methods used to estimate Mineral Resources and
Ore Reserves are provided in the appendices to this announcement.
1
Evolution Mining
Mineral Resource Statement- December 2012
Pajingo Open-Pit 0.5 0.01 3.6 1 0.17 5.0 28 0.32 1.2 12 0.51 2.6 42
Pajingo1 Underground 2.5 1.14 8.4 306 3.27 5.9 621 2.06 5.1 337 6.46 6.1 1,264
Cracow1 Underground 2.3 0.28 8.6 79 1.11 7.7 275 2.90 5.2 488 4.29 6.1 842
Edna May1 Open-Pit 0.4 21.1 0.9 629 16.5 1.0 514 8.18 0.9 226 45.8 0.9 1,369
Edna May Underground 3.0 - - - 0.63 7.2 146 0.58 6.9 128 1.21 7.1 273
Mt Carlton Open-Pit 0.35 9.28 2.0 587 14.7 1.5 695 1.41 1.5 68 25.4 1.7 1,350
Mt Rawdon1 Open-Pit 0.23 1.84 0.4 23 51.5 0.7 1,203 3.42 0.6 62 56.7 0.7 1,288
Twin Hills Open-Pit 0.5 - - - 2.42 2.2 170 0.64 1.7 35 3.06 2.1 204
Twin Hills Underground 2.3 0.54 4.1 71 0.01 3.5 36 0.01 3.9 87 1.56 3.9 194
Total 34.1 1.5 1,696 90.6 1.3 3,688 20.2 2.2 1,443 145 1.5 6,827
Mt Carlton1 Open-Pit * 11.7 57 21,437 14.9 19 9,004 1.51 16 796 28.1 35 31,237
Total 11.7 57 21,437 14.9 19 9,004 1.51 16 796 28.1 35 31,237
Mt Carlton1 Open-Pit * 11.7 0.24 27.9 14.9 0.21 32.1 1.51 0.20 3.0 28.1 0.22 63.1
Total 11.7 0.24 27.9 14.9 0.21 32.1 1.51 0.20 3.0 28.1 0.22 63.1
Total Group 36.5 1.9 2,228 90.9 1.4 3,992 20.3 2.3 1,470 148 1.6 7,691
Notes:
Data is reported to significant figures and differences may occur due to rounding
Mineral Resources are reported inclusive of Ore Reserves
1
Includes stockpiles
* Combined figure for V2 using 0.35g/t Au cut-off and A39 using 42g/t Ag cut-off
The gold equivalence calculation represents total metal value for each metal summed and expressed in equivalent gold grade and ounces
The prices used in the calculation being A$1350/oz Au, A$28.00/oz Ag and A$2.00/lb Cu
Metallurgical recovery to concentrate of 90.0% for gold, 92.0% for silver at V2 and 88.0% for silver at A39 and 92.0% for copper as indicated by metallurgical testwork
1 Troy Ounce = 31.1034768 grams
Au Eq for Silver = ((Price Ag per Oz x Ag Recovery)/(Price Au per Oz x Au Recovery)) x Ag Grade
Au Eq for Copper = ((Price Cu per lb x 2204.623) x (Cu Recovery)) / ((Price Au per Oz x Au Recovery / 31.1034768) x (Cu Grade / 100))
2
Evolution Mining
Mineral Resource Comparison – June 2012 to December 2012
Notes:
Data is reported to significant figures and differences may occur due to rounding
Mineral Resources are reported inclusive of Ore Reserves
3
Evolution Mining
Ore Reserve Statement – December 2012
Mt Carlton1 Open-Pit ** 5.81 0.29 17.1 4.61 0.23 10.5 10.4 0.26 27.6
Total 5.81 0.29 17.1 4.61 0.23 10.5 10.4 0.26 27.6
Total Group 21.0 2.0 1,365 54.9 1.2 2,204 75.9 1.5 3,570
Notes:
Data is reported to significant figures and differences may occur due to rounding
1
Includes stockpiles
** Combined figure for V2 using 0.69g/t Au cut-off and A39 using 53g/t Ag cut-off
The gold equivalence calculation represents total metal value for each metal summed and expressed in equivalent gold grade or ounces
The prices used in the calculation being A$1350/oz Au, A$28.00/oz Ag and A$2.00/lb Cu
metallurgical recovery to concentrate of 90.0% for gold, 92.0% for silver at V2 and 88.0% for silver at A39 and 92.0% for copper as indicated by metallurgical
testwork
1 Troy Ounce = 31.1034768 grams
Au Eq for Silver = ((Price Ag per Oz x Ag Recovery)/(Price Au per Oz x Au Recovery)) x Ag Grade
Au Eq for Copper = ((Price Cu per lb x 2204.623) x (Cu Recovery)) / ((Price Au per Oz x Au Recovery / 31.1034768) x (Cu Grade / 100))
4
Evolution Mining
Ore Reserve Comparison – June 2012 to December 2012
June 2012 18.2 1.6 927 54.1 1.1 1,991 72.4 1.3 2,918
December 2012 19.7 1.6 1,042 54.9 1.2 2,106 74.7 1.3 3,148
Absolute Change 1.50 0 115 0.79 0.1 115 2.28 0.1 230
Relative Change 8% 0% 12% 1% 9% 6% 3% 5% 8%
June 2012 5.56 0.30 16.8 4.61 0.23 10.5 10.2 0.3 27.3
December 2012 5.81 0.29 17.1 4.61 0.23 10.5 10.4 0.3 27.6
Absolute Change 0.25 0.00 0.3 0.00 0.00 0.0 0.25 -0.00 0.2
Relative Change 5% 0% 2% 0% 0% 0% 2% -2% 1%
Notes:
Data is reported to significant figures and differences may occur due to rounding
5
Competent Persons Statement
The information in this statement that relates to the Mineral Resources or Ore Reserves listed in the table below is
based on work compiled by the person whose name appears in the same row, who is employed on a full-time basis
by Evolution Mining and is a member of the institute named in that row. Each person named in the table below has
sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to
the activity which he or she has undertaken to qualify as a Competent Person as defined by the “Australasian Code
for Reporting of Exploration Results, Mineral Resources and Ore Reserves” (2004 JORC Code). Each person
named in the table below consents to the inclusion in this report of the matters based on their information in the form
and context in which it appears.
Cracow Mineral Resources Shane Pike Australasian Institute of Mining and Metallurgy
Pajingo Mineral Resources Calvin Ferguson Australasian Institute of Mining and Metallurgy
Pajingo Ore Reserves – Open-Pit Tony Wallace Australasian Institute of Mining and Metallurgy
Pajingo Ore Reserves – Underground Johan Booyse Australasian Institute of Mining and Metallurgy
Edna May Ore Reserves Luke Cox Australasian Institute of Mining and Metallurgy
Mt Carlton Ore Reserves Tony Wallace Australasian Institute of Mining and Metallurgy
Mt Rawdon Mineral Resources Hans Andersen Australasian Institute of Mining and Metallurgy
Mt Rawdon Ore Reserves Tony Wallace Australasian Institute of Mining and Metallurgy
6
Appendix A
Discussion of Mineral Resources, Ore Reserves and Comparisons
Mineral Resource estimation methodology changes at Pajingo involved changes to the geological domaining,
compositing and estimation search parameters.
Open-pit Mineral Resources are reported at a 0.5g/t gold cut-off, constrained by a A$1,350/oz pit optimisation shell
and estimated using non-linear estimation methods into blocks with dimensions of 5 metres east by 2 metres north
by 2.5 metres elevation.
Underground Mineral Resources are reported at a 2.5g/t gold cut-off, and largely estimated using Ordinary Kriging
into parent blocks with dimensions 15 metres east by 5 metres north by 15 metres elevation and sub-blocks of 1.5
metres east by 0.5 metres north and 1.5 metres elevation.
7
Cracow Mineral Resource
The December 2012 Cracow Mineral Resource estimate of 4.29 million tonnes at 6.1g/t gold for 842koz represents
an increase of 73koz (+10%) net of mining depletion compared to the June 2012 Mineral Resource.
Material changes in the December 2012 Mineral Resource estimate compared to the June 2012 estimate include:
Maiden reportable resources for the Coronation and Griffin structures of 93koz; and
Mining depletion of 55koz.
Mineral Resources are reported above a cut-off of 2.3g/t gold and estimated using Ordinary Kriging into blocks with a
range of dimensions optimised to the characteristics and geometry of each deposit.
8
Mt Rawdon Ore Reserve
The December 2012 Mt Rawdon Ore Reserve estimate of 39.8 million tonnes at 0.8g/t gold for 1,026koz represents
an increase of 112koz (+12%) net of mining depletion compared to the June 2012 Ore Reserve.
The Ore Reserve increase reflects an increase of the Indicated Mineral Resources for December 2012. The increase
in Indicated Mineral Resources is due to an increase in gold estimated by the change in the modelling technique to
MIK and resource definition drilling during 2012. Subsequent conversion of the Indicated Mineral Resources has
resulted in an increase of the Ore Reserves.
The December 2012 Ore Reserve estimate has been reported above the cut-off of 0.3g/t gold using a A$1,350/oz
gold price and gold recovery of 89.5%.
9
additional resource definition drilling or Mineral Resource estimates have been conducted since the June 2012
estimate.
The December 2012 A39 Mineral Resource estimate of 2.95 million tonnes at 170g/t silver and 0.12% copper for
16,134koz silver and 3.4kt of copper represents an increase of 647koz silver compared to the June 2012 estimate.
The change is a result of grade-control drilling having identified additional mineralisation in the A39 open-pit. This
material has been mined and trucked to the Run of Mine (“ROM”) stockpile and is recorded as stockpile material in
the Mineral Resource statement. No additional resource definition drilling or Mineral Resource estimates have been
conducted since the June 2012 estimate.
The V2 Mineral Resource is reported above a cut-off of 0.35 g/t Au and estimated using E-Type Multiple Indicator
Kriging into blocks with dimensions 25 metres east by 25 metres north by 5 metres elevation.
The A39 Mineral Resource is reported above a cut-off of 42g/t silver and estimated using a combination of Ordinary
Kriging for more broadly spaced resource definition drilling and Sequential Gaussian Simulation for close spaced
grade-control drilled areas, into blocks with dimensions 10 metres east by 10 metres north by 2.5 metres elevation.
The A39 Mineral Resource is reported below the 31 December 2012 pit surface.
10
Appendix B
Mineral Resources and Ore Reserve Tables by Project
Notes:
Data is reported to significant figures and differences may occur due to rounding
Mineral Resources are inclusive of Ore Reserves
Pajingo Mineral Resources have been reported above a cut-off grade of 2.5 g/t gold for underground, 0.5 g/t gold for open-pit and
constrained to an A$1,350/oz pit design
Pajingo underground Mineral Resources were estimated using Ordinary Kriging into blocks with dimensions 15 metres east by 5
metres north by 15 metres elevation
Pajingo open-pit Mineral Resources were estimated using Multiple Indicator Kriging into blocks with dimensions 5 metres east by 2
metres north and 2.5 metres elevation
Competent Person: Calvin Ferguson a member of the Australasian Institute of Mining and Metallurgy
11
Pajingo Ore Reserves - December 2012
Proved Probable Total Reserve
Ore Reserve Cont. Cont. Cont.
Tonnes Grade Tonnes Grade Tonnes Grade
Metal Metal Metal
(Mt) Au (g/t) (Mt) Au (g/t) (Mt) Au (g/t)
Au (koz) Au (koz) Au (koz)
Open-Pit
Venue 0.01 3.9 1 0.17 5.6 30 0.18 5.5 31
Underground
Cindy - - - 0.03 5.9 6 0.03 5.9 6
Jandam 0.27 6.6 58 0.12 5.5 21 0.39 6.2 79
Sonia 0.14 10.4 47 0.11 8.1 28 0.25 9.4 75
Zed 0.07 6.0 13 0.48 5.4 84 0.55 5.5 97
Sonia East 0.05 6.0 10 0.14 6.7 29 0.19 6.5 39
Stockpile 0.03 1.6 2 - - - 0.03 1.6 2
Total Pajingo 0.57 7.1 130 1.05 5.9 199 1.62 6.3 329
Notes:
Data is reported to significant figures and differences may occur due to rounding
Ore Reserves are reported above a 3.0 g/t gold cut-off underground and 0.65 g/t gold cut-off for open pit
Ore Reserves are calculated using a A$1,350/oz gold price and a gold recovery of 96.0%
Underground Competent Person: Johan Booyse a member of the Australasian Institute of Mining and Metallurgy
Open-pit Competent Person: Tony Wallace a member of the Australasian Institute of Mining and Metallurgy
12
Cracow Mineral Resources - December 2012
Measured Indicated Inferred Total Resource
Mineral Resource Cont. Cont. Cont. Cont.
Tonnes Grade Tonnes Grade Tonnes Grade Tonnes Grade
Metal Metal Metal Metal
(Mt) Au (g/t) (Mt) Au (g/t) (Mt) Au (g/t) (Mt) Au (g/t)
Au (koz) Au (koz) Au (koz) Au (koz)
Crown Shoot 0.07 9.0 20 - - - 0.38 4.5 55 0.45 5.2 74
Empire - - - 0.08 14.8 37 0.40 6.4 84 0.48 7.8 121
Kilkenny 0.06 8.8 17 0.23 7.4 55 0.70 5.1 115 0.99 5.9 187
Klondyke North Shoot 0.001 6.8 0.3 0.23 6.0 44 0.16 3.7 19 0.39 5.1 63
Phoenix 0.03 9.6 10 0.02 8.3 6 0.02 6.4 5 0.08 8.3 20
Roses Pride 0.06 9.9 18 0.14 9.9 43 0.14 6.0 27 0.33 8.3 88
Royal Shoot 0.00 11.0 0.4 - - - 0.09 6.7 18 0.09 6.8 19
Sovereign Shoot 0.03 4.4 4 0.12 4.3 17 0.38 3.6 44 0.53 3.8 65
Tipperary 0.01 7.2 3 0.24 7.8 61 0.23 5.6 42 0.49 6.7 106
Coronation - - - - - - 0.34 6.2 69 0.34 6.2 69
Griffin - - - 0.06 7.0 12 0.06 5.4 11 0.12 6.1 24
Stockpile 0.02 8.7 6 - - - - - - 0.02 8.7 6
Total Cracow 0.28 8.6 79 1.11 7.7 275 2.90 5.2 488 4.29 6.1 842
Notes:
Data is reported to significant figures and differences may occur due to rounding
Mineral Resources are inclusive of Ore Reserves
Cracow Mineral Resources have been reported above a cut-off grade of 2.3 g/t gold
Cracow was estimated using Ordinary Kriging into blocks with a range of dimensions optimised to the characteristics and geometry of
each deposit
Competent Person: Shane Pike a member of the Australasian Institute of Mining and Metallurgy
13
Cracow Ore Reserves - December 2012
Proved Probable Total Reserve
Tonnes Grade Cont. Tonnes Grade Cont. Tonnes Grade Cont.
Ore Reserve
(Mt) Au (g/t) Metal Au (Mt) Au (g/t) Metal Au (Mt) Au (g/t) Metal Au
(koz) (koz) (koz)
Notes:
Data is reported to significant figures and differences may occur due to rounding
Ore Reserves are reported above a 3.6 g/t gold cut-off
Ore Reserves are calculated using a A$1,350/oz gold price and a gold recovery of 93.0%
Competent Person: Fusheng Li a member of the Australasian Institute of Mining and Metallurgy
14
Mt Rawdon Mineral Resources - December 2012
Measured Indicated Inferred Total Resource
Notes:
Data is reported to significant figures and differences may occur due to rounding
Mineral Resources are inclusive of Ore Reserves
Mt Rawdon Mineral Resources have been reported above a cut-off grade of 0.23 g/t gold and constrained to an A$1,800/oz pit
optimisation shell
Mt Rawdon was estimated using Multiple Indicator Kriging into blocks with dimensions 20 metres east by 20 metres north by 10
metres elevation
Competent Person: Hans Andersen a member of the Australasian Institute of Mining and Metallurgy
15
Mt Rawdon Ore Reserves - December 2012
Proved Probable Total Reserve
Notes:
Data is reported to significant figures and differences may occur due to rounding
Ore Reserves are reported above a 0.3 g/t gold cut-off
Ore Reserves are calculated using a A$1,350/oz gold price and a variable gold recovery, approximately 89.5% for average head grade
reported
Competent Person: Tony Wallace a member of the Australasian Institute of Mining and Metallurgy
16
Edna May Mineral Resources - December 2012
Measured Indicated Inferred Total Resource
Notes:
Data is reported to significant figures and differences may occur due to rounding
Mineral Resources are inclusive of Ore Reserves
Edna May and Greenfinch Mineral Resources have been reported above a cut-off grade of 0.4 g/t gold and Edna May underground
reported above 3.0 g/t gold
Edna May and Greenfinch were estimated using E-Type Multiple Indicator Kriging (MIK) into blocks with dimensions 25 metres east
by 25 metres north by 5 metres elevation and 20 metres east by 15 metres north by 5 metres elevation respectively. Edna May
open-pit was reported above the 1050mRL (290 metres below surface)
Edna May underground deposit was estimated using Ordinary Kriging into blocks with dimensions 5 metres east by 5 metres north
by 5 metres elevation and is reported below the 1050mRL
Competent Person: John Winterbottom a member of Australian Institute of Geoscientists
17
Edna May Ore Reserves - December 2012
Proved Probable Total Reserve
Notes:
Data is reported to significant figures and differences may occur due to rounding
Ore Reserves are reported above a 0.4 g/t gold cut-off
Ore Reserves were calculated using a A$1,500/oz gold price and a gold recovery of 91.0%
Competent Person: Luke Cox a member of the Australasian Institute of Mining and Metallurgy
18
Gold - Mt Carlton Mineral Resources - December 2012
Measured Indicated Inferred Total Resource
Mineral Resource Cont. Cont. Cont. Cont.
Tonnes Grade Tonnes Grade Tonnes Grade Tonnes Grade
Metal Metal Metal Metal
(Mt) Au (g/t) (Mt) Au (g/t) (Mt) Au (g/t) (Mt) Au (g/t)
Au (koz) Au (koz) Au (koz) Au (koz)
A39 - - - - - - - - - - - -
V2 9.02 2.0 586 14.7 1.5 695 1.41 1.5 68 25.2 1.7 1,350
Stockpile 0.25 0.1 1 - - - - - - 0.25 0.1 1
Total Mt Carlton 9.28 2.0 587 14.7 1.5 695 1.41 1.5 68 25.4 1.7 1,350
A39 2.38 4.0 307 0.23 1.6 12 0.10 1.7 5 2.70 3.7 325
V2 9.02 2.8 798 14.7 2.1 988 1.41 2.0 90 25.2 2.3 1,876
Stockpile 0.25 1.7 14 - - - - - - 0.25 1.7 14
Total Mt Carlton 11.7 3.0 1,119 14.9 2.1 1,000 1.51 2.0 95 28.1 2.5 2,214
19
Gold - Mt Carlton Mineral Resources Comparison - June 2012 to December 2012
Measured Indicated Inferred Total
Period Cont. Cont. Cont. Cont.
Tonnes Grade Au Tonnes Grade Au Tonnes Grade Au Tonnes Grade Au
Metal Au Metal Au Metal Au Metal Au
(Mt) (g/t) (Mt) (g/t) (Mt) (g/t) (Mt) (g/t)
(koz) (koz) (koz) (koz)
June 2012 9.02 2.0 586 14.71 1.5 695 1.41 1.5 68 25.2 1.7 1,350
December 2012 9.02 2.0 586 14.71 1.5 695 1.41 1.5 68 25.2 1.7 1,350
Absolute Change 0.00 0.0 0 0.00 0.0 0 0.00 0.0 0 0.00 0.0 0
Relative Change 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0%
Gold Equivalent - Mt Carlton Mineral Resources Comparison - June 2012 to December 2012
Measured Indicated Inferred Total
Period Cont. Cont. Cont. Cont.
Tonnes Grade Tonnes Grade Tonnes Grade Tonnes Grade
Metal Metal Metal Metal
(Mt) AuEq (g/t) (Mt) AuEq (g/t) (Mt) AuEq (g/t) (Mt) AuEq (g/t)
AuEq (koz) AuEq (koz) AuEq (koz) AuEq (koz)
June 2012 11.4 3.0 1,106 14.9 2.1 1,000 1.51 2.0 95 27.9 2.4 2,200
December 2012 11.7 3.0 1,119 14.9 2.1 1,000 1.51 2.0 95 28.1 2.5 2,214
Absolute Change 0.25 0.0 14 0.00 0.0 0 0.00 0.0 0 0.25 0.1 14
Relative Change 2% 0% 1% 0% 0% 0% 0% 0% 0% 1% 4% 1%
Notes:
Data is reported to significant figures and differences may occur due to rounding
Mineral Resources are inclusive of Ore Reserves
Mt Carlton V2 deposit Mineral Resources have been reported above a cut-off grade of 0.35 g/t gold and A39 deposit reported
above 42g/t silver
Mt Carlton V2 deposit was estimated using E-Type Multiple Indicator Kriging into blocks with dimensions 25 metres east by 25
metres north by 5 metres elevation
Mt Carlton A39 deposit was estimated using a combination of Ordinary Kriging, for more broadly spaced Resource Definition
drilling, and Sequential Gaussian Simulation for close spaced grade control drilled areas of the deposit into blocks with dimensions
10 metres by 10 metres by 2.5 metres elevation
Competent Person: John Winterbottom a member of Australian Institute of Geoscientists
The gold equivalence calculation represents total metal value for each metal summed and expressed in equivalent gold grade and
ounces. The prices used in the calculation being A$1350/oz Au, A$28.00/oz Ag and A$2.00/lb Cu. Metallurgical recovery to
concentrate of 90.0% for gold, 92.0% for silver at V2 and 88.0% silver at A39 and 92.0% for copper as indicated by metallurgical
testwork
1 Troy Ounce = 31.1034768 grams
Au Eq for Silver = ((Price Ag per Oz x Ag Recovery)/(Price Au per Oz x Au Recovery)) x Ag Grade
Au Eq for Copper = ((Price Cu per lb x 2204.623) x (Cu Recovery)) / (Price Au per Oz x Au Recovery / 31.1034768) x (Cu Grade /
100)
20
Gold - Mt Carlton Ore Reserves - December 2012
Proved Probable Total Reserve
Ore Reserve Cont. Cont. Cont.
Tonnes Grade Tonnes Grade Tonnes Grade
Metal Au Metal Au Metal Au
(Mt) Au (g/t) (Mt) Au (g/t) (Mt) Au (g/t)
(koz) (koz) (koz)
A39 - - - - - - - - -
V2 4.52 3.1 446 4.61 2.5 366 9.13 2.8 812
Total Mt Carlton 4.52 3.1 446 4.61 2.5 366 9.13 2.8 812
21
Gold - Mt Carlton Ore Reserves Comparison - June 2012 to December 2012
Proved Probable Total
Period Cont. Cont. Cont.
Tonnes Grade Au Tonnes Grade Au Tonnes Grade Au
Metal Au Metal Au Metal Au
(Mt) (g/t) (Mt) (g/t) (Mt) (g/t)
(koz) (koz) (koz)
June 2012 4.52 3.1 446 4.61 2.5 366 9.13 2.8 812
December 2012 4.52 3.1 446 4.61 2.5 366 9.13 2.8 812
Absolute Change 0.00 0.0 0 0.00 0.0 0 0.00 0.0 0
Relative Change 0% 0% 0% 0% 0% 0% 0% 0% 0%
Gold Equivalent - Mt Carlton Ore Reserves Comparison - June 2012 to December 2012
Proved Probable Total
Period Cont. Cont. Cont.
Tonnes Grade Tonnes Grade Tonnes Grade
Metal Metal Metal
(Mt) AuEq (g/t) (Mt) AuEq (g/t) (Mt) AuEq (g/t)
AuEq (koz) AuEq (koz) AuEq (koz)
June 2012 5.56 4.2 755 4.61 3.1 464 10.2 3.7 1,220
December 2012 5.81 4.1 769 4.61 3.1 464 10.4 3.7 1,233
Absolute Change 0.25 -0.1 15 0.00 0.0 0 0.25 -0.0 13
Relative Change 5% -2% 2% 0% 0% 0% 2% -1% 1%
Notes:
Data is reported to significant figures and differences may occur due to rounding
V2 Ore Reserves are reported above a 0.69 g/t gold cut-off and A39 Ore Reserves reported above a 53 g/t silver cut-off
Ore Reserves were calculated using a gold price of A$1,350/oz, silver price of A$28.00/oz silver price and copper price of A$2.00/lb
V2 deposit used variable recoveries proportionate to head grade with gold recovery ranging from 82.0% to 90.0%, silver and copper
recoveries ranged from 84.0% to 92.0%
A39 deposit used 88.0% and 92.0% for silver and copper recoveries respectively
Smelter payabilities were also considered in the reserve calculation
Competent Person: Tony Wallace a member of the Australasian Institute of Mining and Metallurgy
The gold equivalence calculation represents total metal value for each metal summed and expressed in equivalent gold grade and
ounces. The prices used in the calculation being A$1350/oz Au, A$28.00/oz Ag and A$2.00/lb Cu. Metallurgical recovery to concentrate
of 90.0% for gold, 92.0% for silver at V2 and 88.0% silver at A39 and 92.0% for copper as indicated by metallurgical testwork
Au Eq for Silver = ((Price Ag per Oz x Ag Recovery)/(Price Au per Oz x Au Recovery)) x Ag Grade
Au Eq for Copper = ((Price Cu per lb x 2204.623) x (Cu Recovery)) / (Price Au per Oz x Au Recovery / 31.1034768) x (Cu Grade / 100)
22
Twin Hills Mineral Resources - December 2012
Measured Indicated Inferred Total Resource
Mineral Resource Cont. Cont. Cont. Cont.
Tonnes Grade Tonnes Grade Tonnes Grade Tonnes Grade
Metal Au Metal Au Metal Au Metal Au
(Mt) Au (g/t) (Mt) Au (g/t) (Mt) Au (g/t) (Mt) Au (g/t)
(koz) (koz) (koz) (koz)
Open-Pit
309 Deposit - - - 2.42 2.2 170 0.64 1.7 35 3.06 2.1 204
Underground
Lone Sister 0.54 4.1 71 0.28 3.4 31 0.20 2.8 18 1.02 3.7 120
309 Deposit - - - 0.04 3.9 5 0.50 4.3 69 0.54 4.3 74
Total Twin Hills 0.54 4.1 71 2.74 2.3 205 1.34 2.8 122 4.62 2.7 399
Notes:
Data is reported to significant figures and differences may occur due to rounding
Twin Hills Mineral Resources have been reported above a cut-off grade of 2.0 g/t gold for underground, 0.5 g/t gold for open-pit and
within a A$1,500/oz pit shell
Twin Hills Lone Sister was estimated using Ordinary Kriging and 309 using Multiple Indicator Kriging (E Type) into blocks with
dimensions 5 metres east by 5 metres north by 5 metres elevation
Competent Person: John Winterbottom a member of Australian Institute of Geoscientists
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