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2010 Block A Constrained Pit Mineral Resource Estimate – Base Case at US$ 1,000 Gold
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Strip Ratio 4.57
Cut-off 0.4 g/t
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Tonnes
(millions)
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Grade
(grams/tonne)
|
Total Contained Gold (troy ounces)
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TWD
50%
|
|
Indicated Mineral Resource
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70.8
|
0.85
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1,924,000
|
962,000
|
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Inferred Mineral Resource:
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27.3
|
0.87
|
762,000
|
381,000
|
|
Total Mineral Resources
|
|
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2,686,000
|
1,343,000
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Source: NI 43-101Technical Report, February, 2011 Watts, Griffis and McOuat
Notes:
- The mineral resources are classified as indicated and inferred, and comply with the CIM mineral resource definitions referenced in National Instrument 43-101.
- Base case assumes a gold price of US$ 1,000/oz gold and US$ exchange rate of $1.08.
- Mineral resources that are not mineral reserves do not have demonstrated economic viability.
- The quantity and grade of reported inferred resources in this estimation are conceptual in nature and there has been insufficient exploration to define these inferred resources as an indicated or measured resource and it is uncertain if further exploration will result in upgrading them to an indicated or measured resource category.
- The tonnages and grades quoted are undiluted. Gold grades were capped at values ranging from 10 g/t to 100 g/t based on statistical analysis.
The block model mineral resource was estimated within a Lerch-Grossman pit shell using MineSight® software based on the concept of a large-scale open pit with the pit parameters indicated below. The cost estimates used in the study were compiled by WGM utilizing public information from similar operations and from various suppliers and contractors.
Pit Parameters:
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Exchange Rate
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C$ 1.08 = US$ 1.00
|
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Recovery
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91%
|
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Ore Mining Costs
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C$ 1.86 / tonne
|
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Waste Mining Costs
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C$ 1.76 / tonne
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Processing Costs
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C$ 5.73 / tonne
|
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G & A
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C$ 1.23 / tonne
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Refining Costs
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US$ 1.00 / oz
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Royalty
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2%
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2011 Total Mineral Resource Estimate (Surface to Depth of 500 Metres)
|
|
Tonnes
(millions)
|
Grade
(grams/tonne)
|
Total Contained Gold (troy ounces)
|
TWD
50%
|
|
Indicated Mineral Resource
|
90.5
|
0.84
|
2,447,500
|
1,223,750
|
|
Inferred Mineral Resource
|
73.7
|
0.83
|
1,967,300
|
983,650
|
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Total Mineral Resources
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164.2
|
0.835
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4,414,800
|
2,207,400
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Source: NI 43-101 Technical Report, February, 2011 Watts, Griffis and McOuat
Notes:
- The mineral resources are classified as indicated and inferred, and comply with the CIM mineral resource definitions referenced in National Instrument 43-101.
- 2011 Base case assumes a gold price of US $1,000/oz gold and US$ exchange rate of $1.08.
- Mineral resources that are not mineral reserves do not have demonstrated economic viability.
- The quantity and grade of reported inferred resources in this estimation are conceptual in nature and there has been insufficient exploration to define these inferred resources as an indicated or measured resource and it is uncertain if further exploration will result in upgrading them to an indicated or measured resource category.
- The tonnages and grades quoted are undiluted. Gold grades were capped at values ranging from 10 g/t to 100 g/t based on statistical analysis.
Exploration & Drilling Highlights on Block A
- Total of 632 holes drilled on M-Zone and NWL zone
- Completed over 126,500 metres of drilling by Trade Winds
- M-Zone has a 3.6 kilometre strike length on Block A
- NWL-Zone has a 500 metre strike length on Block A
- Majority of 2,686,000 in-pit indicated and inferred oz's are between 0-350 metres from surface
View the Block A NI 43-101 Technical Report, February 2011 by Watts Griffis and McOuat
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