Garrick Yanahuanca Poster - Final PFS
1
Yanahuanca Gold Project • Location: La Libertad, Peru • Elevation: 4000m asl • Lithology: Sedimentary and Volcanic Rocks • Deposit: High Sulphidation Epithermal Gold Peru Thomas Bamford Gianluca Barbieri Camilla Sublett Matthew Visser 1. Introduction 2. Operations Planning 4. Pit Design Inputs 7. Environment/Social/Closure 3. WRD & HLF 5. Pit Design/Site Map 6. Production Schedule 8. Economic Analysis 9. Recommendations 0 5 10 15 20 25 1 3 5 7 9 11 13 15 17 19 21 23 25 27 Tonnage (Mt) Year Waste Ore Ore: 293 Mt Waste: 114 Mt Stripping Ratio: 0.4 Avg. Grade: 1.23 g/t Pit Length: 2,430 m Pit Width: 1,070 m Pit Depth: 320 m Site Infrastructure 1. Emergency Pond 2. Water Treatment Plant 3. Processing Plant 4. Pregnant Pond 5. HLF Crusher 6. Explosive Magazine 7. Warehouse 8. Maintenance Shop 9. Storage 10. Administration Office 11. Security Gatehouse A A’ 1 2 4 3 5 6 7 8 10 9 11 N Legend Access Road with Powerlines Haul Road 50m Contour Lines Geomechanical Data 1 Slope Stability 2 Inputs 3 • Andesite “Fair”; 3 Joint Sets; UCS 176 MPa • Sandstone “Fair”; 5 Joint Sets; UCS 126 MPa • Bench Height: 10 m • Bench Width: 6.5 m • Bench Face Angle: 60-75° • Slope Min. Factor of Safety: 1.2 • Structurally Controlled Failure Parameters Gold Price $1,100 /t.oz. Gold Recovery 70% Total Mining Cost $5.44 /t ore Milling Cost $2.82 /t ore Mining Capacity 20,000,000 t/year Milling Capacity 35,000 t/day 330 day/year Transport & Refining Cost $57.64/toz Royalty 5% NSR 1 Waste Rock Dump • Storage: 171 Mm 3 • Configuration: Side Hill Fill • Leaching Method: Crush-Screen-Agglomerate • Construction Method: Mobile Field Conveyors • Footprint: 300 ha • Slope Angle: 2H:1V Heap Leach Facility Shovel and Truck Drill and Blast Shovel – Komatsu PC8000-6 Truck – Komatsu 860E-1K 0 2 4 6 8 10 12 14 1 3 5 7 9 11 13 15 17 19 21 23 25 27 Required Number Year Consistent Manufacturer 3 Passes Efficient Scheduling and Repairing 89% Truck Utilization Benefits Drills – Pit Viper 235 • 2 Drills at Full Production Ramp Design 2 Lanes – 24 m at 8% 1 Lane – 19 m at 10% 1 2 3 A A’ 1 Key Environmental Issues • Water Pollution (spills, sediment loading, Acid Mine Drainage) • Soil Erosion (de-vegetation, overburden stripping) • Pollution (air, dust, noise) 2 Key Social Issues • Negative bias against mining leads to public disapproval • Conflict with local residents over fresh water use • Changes to local economy and culture due to mine employment 3 Closure Strategy • Pit: Re-sloping, clay or NPAG layer on pit floor, followed by pit flooding • Waste Rock Dump: Re-grading and capillary barrier cover • Heap Leach Facility: HLF rinse, re-grading and capillary barrier cover 2 • Storage: 60.65 Mm 3 (Main) + 15.59 Mm 3 (Aux) • Configuration: Side Hill Fill • Construction Method: Free Dumping • Footprint: 135 ha (Main) + 40 ha (Aux) • Slope Angle: 2.5H:1V • 86% Potentially Acid Generating 1 2 Key Economic Parameters • NPV: $470 Million (After-tax, discount rate of 10%) • IRR: 32.5% • Total Capital Expenditure: $356 Million Cash Flow Components NPV Sensitivity 3 • Enter into a tax stability agreement with the Peruvian government • Obtain local contractor estimates and quotes from suppliers • Conduct leach tests on samples of ore to determine recovery and optimal cyanide solution concentration • Complete material characterization (PAG/NPAG, Geomechanical Data) Results of PFS have shown the project is economically viable and operationally feasible, so we recommend advancing the project to the next stage of study. Au Price Capex Opex $0 $100,000 $200,000 $300,000 $400,000 $500,000 $600,000 $700,000 $800,000 $900,000 70% 80% 90% 100% 110% 120% 130% 140% NPV($1000) Sensitivity - NPV ($200,000) ($100,000) $0 $100,000 $200,000 $300,000 $400,000 -2 -1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Cash Flow ($1000) Cash Flow Components Tax Sust capex Initial Capex Closure Opex Revenue
-
Upload
camilla-sublett -
Category
Documents
-
view
92 -
download
2
Transcript of Garrick Yanahuanca Poster - Final PFS
Yanahuanca Gold Project
• Location: La Libertad, Peru• Elevation: 4000m asl• Lithology: Sedimentary and Volcanic Rocks• Deposit: High Sulphidation Epithermal Gold
Peru
Thomas Bamford Gianluca BarbieriCamilla Sublett Matthew Visser
1. Introduction
2. Operations Planning
4. Pit Design Inputs 7. Environment/Social/Closure
3. WRD & HLF
5. Pit Design/Site Map
6. Production Schedule
8. Economic Analysis
9. Recommendations
0
5
10
15
20
25
1 3 5 7 9 11 13 15 17 19 21 23 25 27
Ton
nag
e (
Mt)
Year
Waste
Ore
Ore: 293 MtWaste: 114 MtStripping Ratio: 0.4Avg. Grade: 1.23 g/tPit Length: 2,430 mPit Width: 1,070 mPit Depth: 320 m
Site Infrastructure1. Emergency Pond2. Water Treatment Plant3. Processing Plant4. Pregnant Pond5. HLF Crusher6. Explosive Magazine7. Warehouse8. Maintenance Shop9. Storage10. Administration Office11. Security Gatehouse
A
A’
1 2
43
5
6
7 810 9
11
N
LegendAccess Road with PowerlinesHaul Road50m Contour Lines
Geomechanical Data1
Slope Stability2
Inputs3
• Andesite“Fair”; 3 Joint Sets; UCS 176 MPa
• Sandstone“Fair”; 5 Joint Sets; UCS 126 MPa
• Bench Height: 10 m• Bench Width: 6.5 m• Bench Face Angle: 60-75°• Slope Min. Factor of Safety: 1.2• Structurally Controlled Failure
Parameters
Gold Price $1,100 /t.oz.
Gold Recovery 70%
Total Mining Cost $5.44 /t ore
Milling Cost $2.82 /t ore
Mining Capacity 20,000,000 t/year
Milling Capacity 35,000 t/day330 day/year
Transport &Refining Cost
$57.64/toz
Royalty 5% NSR
1 Waste Rock Dump
• Storage: 171 Mm3
• Configuration: Side Hill Fill• Leaching Method: Crush-Screen-Agglomerate• Construction Method: Mobile Field Conveyors• Footprint: 300 ha• Slope Angle: 2H:1V
Heap Leach Facility
Shovel and Truck Drill and BlastShovel – Komatsu PC8000-6Truck – Komatsu 860E-1K
0
2
4
6
8
10
12
14
1 3 5 7 9 11 13 15 17 19 21 23 25 27
Re
qu
ire
d N
um
be
r
Year
Consistent Manufacturer 3 Passes
Efficient Scheduling and
Repairing
89% Truck Utilization
Benefits
Drills – Pit Viper 235• 2 Drills at Full Production
Ramp Design
2 Lanes – 24 m at 8%1 Lane – 19 m at 10%
1 2
3
AA’
1 Key Environmental Issues• Water Pollution (spills, sediment loading, Acid Mine Drainage)• Soil Erosion (de-vegetation, overburden stripping)• Pollution (air, dust, noise)
2 Key Social Issues• Negative bias against mining leads to public disapproval• Conflict with local residents over fresh water use• Changes to local economy and culture due to mine employment
3 Closure Strategy• Pit: Re-sloping, clay or NPAG layer on pit floor, followed by pit flooding• Waste Rock Dump: Re-grading and capillary barrier cover• Heap Leach Facility: HLF rinse, re-grading and capillary barrier cover
2
• Storage: 60.65 Mm3 (Main) + 15.59 Mm3 (Aux)• Configuration: Side Hill Fill• Construction Method: Free Dumping• Footprint: 135 ha (Main) + 40 ha (Aux)• Slope Angle: 2.5H:1V• 86% Potentially Acid Generating
1
2
Key Economic Parameters
• NPV: $470 Million (After-tax, discount rate of 10%)• IRR: 32.5%• Total Capital Expenditure: $356 Million
Cash Flow Components
NPV Sensitivity3
• Enter into a tax stability agreement with the Peruvian government• Obtain local contractor estimates and quotes from suppliers• Conduct leach tests on samples of ore to determine recovery and optimal
cyanide solution concentration• Complete material characterization (PAG/NPAG, Geomechanical Data)
Results of PFS have shown the project is economically viable and operationally feasible, so we recommend advancing the project to the next stage of study.
Au Price
CapexOpex
$0
$100,000
$200,000
$300,000
$400,000
$500,000
$600,000
$700,000
$800,000
$900,000
70% 80% 90% 100% 110% 120% 130% 140%
NP
V($
1000)
Sensitivity - NPV
($200,000)
($100,000)
$0
$100,000
$200,000
$300,000
$400,000
-2 -1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
Cash
Flo
w (
$1
00
0)
Cash Flow Components
Tax Sust capex Initial Capex Closure Opex Revenue
