OceanaGold : Haile Gold Mine 43-101 Technical Report

NI 43-101 Technical Report Haile Gold Mine

Lancaster County, South Carolina

Effective Date: December 31, 2023

Report Date: March 28, 2024

Report Prepared for

OceanaGold Haile Gold Mine

Report Prepared by

SRK Consulting (U.S.), Inc.

999 Seventeenth Street, Suite 400 Denver, CO 80202

SRK Project Number: USPR001819

Signed by Qualified Persons:

David Carr, BEng Metallurgical (Hons), MAusIMM (CP) (OceanaGold Group Manager Metallurgy)

David Londono, BSC, MEng, MSc Earth and Systems Engineering, MBA, RM-SME (OceanaGold Executive Vice President, Chief Operating Officer Americas)

Jonathan Moore, BSc Geology (Hons), Mausam (CP) (OceanaGold Group Manager Resource Development) Brianna Drury, BEng Mining, RM-SME (OceanaGold Underground Engineering Superintendent)

Larry Standridge, PE, MSE Geotechnical (Call & Nicholas Principal Engineer, Geotechnical Engineer) Robert Cook, PE, RM-SME (Call & Nicholas Principal I Geological Engineer)

Jay Newton Janney-Moore, PE, RM-SME (NewFields Senior Project Manager I)

William Lucas Kingston, MSc, P.G., RM-SME, Hydrogeology and Groundwater Management (NewFields Senior Hydrogeologist)

Matt Sullivan, BEng, RM-SME (SRK Principal Consultant, Mineral Economics) Brooke Miller Clarkson, MSc., CPG (SRK Principal Consultant, Geology)

Reviewed by:

Joanna Poeck, BEng Mining, SME-RM, MMSAQP (SRK Principal Consultant, Mining Engineer)

SRK Consulting (U.S.), Inc.

NI 43-101 Technical Report - Haile Gold Mine Open Pit and Underground Update

Cautionary Note Regarding Forward-Looking Statements

This report contains certain "forward-looking statements" and "forward-looking information" (collectively, "forward-looking statements") within the meaning of applicable Canadian securities laws. All statements, other than statements of historical fact regarding OceanaGold Corporation ("OceanaGold") or the Haile Gold Mine, are forward-looking statements. The words "believe", "expect", "anticipate", "contemplate", "target", "plan", "intend", "project", "continue", "budget", "estimate", "potential", "may", "will", "can", "could" and similar expressions identify forward-looking statements. In particular, this report contains forward-looking statements with respect to cash flow forecasts, projected capital, operating and exploration expenditures, targeted cost reductions, mine life and production rates, potential mineralization and metal or mineral recoveries, and information pertaining to potential improvements to financial and operating performance and mine life at the Haile Gold Mine. All forward-looking statements in this report are necessarily based on opinions and estimates made as of the date such statements are made and are subject to important risk factors and uncertainties, many of which cannot be controlled or predicted. Material assumptions regarding forward-looking statements are discussed in this report, where applicable. In addition to such assumptions, the forward-looking statements are inherently subject to significant business, economic and competitive uncertainties and contingencies. Known and unknown factors could cause actual results to differ materially from those projected in the forward-looking statements. Such factors include, but are not limited to: fluctuations in the spot and forward price of metals and commodities (including gold, diesel fuel, natural gas and electricity); the speculative nature of mineral exploration and development; changes in mineral production performance, exploitation and exploration successes; diminishing quantities or grades of reserves; increased costs, delays, suspensions, and technical challenges associated with the construction of capital projects; operating or technical difficulties in connection with mining or development activities, including disruptions in the maintenance or provision of required infrastructure and information technology systems; damage to OceanaGold's or the Haile Gold Mine's reputation due to the actual or perceived occurrence of any number of events, including: negative publicity with respect to the handling of environmental matters or dealings with community groups, whether true or not; risk of loss due to acts of war, terrorism, sabotage and civil disturbances; uncertainty whether the Haile Gold Mine will meet OceanaGold's capital allocation objectives; the impact of global liquidity and credit availability on the timing of cash flows and the values of assets and liabilities based on projected future cash flows; the impact of inflation; fluctuations in the currency markets; changes in interest rates; changes in national and local government legislation, taxation, controls or regulations and/or changes in the administration of laws, policies and practices; expropriation or nationalization of property and political or economic developments; failure to comply with environmental and health and safety laws and regulations; timing of receipt of, or failure to comply with, necessary permits and approvals; litigation; contests over title to properties or over access to water, power and other required infrastructure; increased costs and physical risks including extreme weather events and resource shortages, related to climate change; and availability and increased costs associated with mining inputs and labor. In addition, there are risks and hazards associated with the business of mineral exploration, development, and mining, including environmental hazards, industrial accidents, unusual or unexpected formations, pressures, cave-ins, flooding and gold bullion, copper cathode or gold or copper concentrate losses (and the risk of inadequate insurance, or inability to obtain insurance, to cover these risks).

Many of these uncertainties and contingencies can affect OceanaGold's actual results and could cause actual results to differ materially from those expressed or implied in any forward-looking statements made by, or on behalf of, OceanaGold. All of the forward-looking statements made in this report are qualified by these cautionary statements and OceanaGold and the qualified persons who authored this report undertake no obligation to update publicly or otherwise revise any forward‐looking statements whether as a result of new information or future events or otherwise, except as may be required by law.

JP

Haile_NI43-101_UG_OpenPit_2023_Update_Report_USPR001819_Rev08.docx

SRK Consulting (U.S.), Inc.

NI 43-101 Technical Report - Haile Gold Mine Open Pit and Underground Update

Table of Contents

1 Summary ..................................................................................................................... 17

• 1.1 Property Description and Ownership ................................................................................................ 17

• 1.2 Geology and Mineralization .............................................................................................................. 17

• 1.3 Status of Exploration; Development and Operations ........................................................................ 17

• 1.4 Mineral Processing and Metallurgical Testing .................................................................................. 18

• 1.5 Mineral Resource Estimate ............................................................................................................... 18

  Open Pit Mineral Resource Estimate .................................................................................... 19

  Underground Mineral Resource Estimate ............................................................................. 19

  Combined Open Pit and Underground Resource Estimate .................................................. 22

• 1.6 Mineral Reserve Estimate ................................................................................................................. 22

  Open Pit Mineral Reserves Estimate .................................................................................... 22

  Underground Mineral Reserves Estimate ............................................................................. 23

  Combined Open Pit and Underground Reserves Estimate .................................................. 24

• 1.7 Mining Methods ................................................................................................................................. 25

  Open Pit Mining Methods ...................................................................................................... 25

  Underground Mining Methods ............................................................................................... 28

  Combined OP and UG Production Schedule ........................................................................ 30

• 1.8 Recovery Methods ............................................................................................................................ 32

• 1.9 Project Infrastructure ......................................................................................................................... 32

• 1.10 Environmental Studies and Permitting .............................................................................................. 32

• 1.11 Capital and Operating Costs ............................................................................................................. 33

• 1.12 Economic Analysis ............................................................................................................................ 34

• 1.13 Conclusions and Recommendations ................................................................................................ 35

  Geology and Mineral Resources ........................................................................................... 36

  Status of Exploration; Development and Operations ............................................................ 36

  Mining and Reserves ............................................................................................................. 37

  Mineral Processing and Metallurgical Testing ....................................................................... 38

  Recovery Methods ................................................................................................................ 38

  Project Infrastructure ............................................................................................................. 38

  Environmental Studies and Permitting .................................................................................. 38

  Economic Analysis ................................................................................................................ 39

2 Introduction ................................................................................................................ 40

• 2.1 Terms of Reference and Purpose of the Report ............................................................................... 40

• 2.2 Qualifications of Consultants ............................................................................................................ 40

• 2.3 Details of Inspection .......................................................................................................................... 42

JP

Haile_NI43-101_UG_OpenPit_2023_Update_Report_USPR001819_Rev08.docx

SRK Consulting (U.S.), Inc.

NI 43-101 Technical Report - Haile Gold Mine Open Pit and Underground Update

• 2.4 Sources of Information ...................................................................................................................... 42

• 2.5 Effective Date .................................................................................................................................... 42

• 2.6 Units of Measure ............................................................................................................................... 43

3 Reliance on Other Experts ........................................................................................ 44

• 4 Property Description and Location .......................................................................... 45

  • 4.1 Property Location .............................................................................................................................. 45

  • 4.2 Ownership ......................................................................................................................................... 47

• 5 Accessibility, Climate, Local Resources, Infrastructure and Physiography ........ 49

  • 5.1 Accessibility ....................................................................................................................................... 49

  • 5.2 Climate .............................................................................................................................................. 49

  • 5.3 Local Resources and Infrastructure .................................................................................................. 49

  • 5.4 Physiography .................................................................................................................................... 49

  • 5.5 Infrastructure Availability and Sources .............................................................................................. 49

• 6 History ......................................................................................................................... 50

• 7 Geological Setting and Mineralization ..................................................................... 52

  • 7.1 Regional Geology .............................................................................................................................. 52

  • 7.2 Local Geology ................................................................................................................................... 55

  Lithology ................................................................................................................................ 56

  Structure ................................................................................................................................ 62

• Mineralization and Alteration ................................................................................................. 64

• 8 Deposit Type .............................................................................................................. 66

  • 8.1 Haile Genetic Model .......................................................................................................................... 66

  • 8.2 Haile Geological Model ..................................................................................................................... 67

• 9 Exploration ................................................................................................................. 68

  • 9.1 Pre-Romarco ..................................................................................................................................... 68

  • 9.2 Romarco ............................................................................................................................................ 68

  • 9.3 OceanaGold ...................................................................................................................................... 68

  Geologic Mapping and Surface Sampling ............................................................................. 68

  Geophysics ............................................................................................................................ 69

• 10 Drilling ......................................................................................................................... 71

  10.1 Type and Extent ................................................................................................................................ 71

  10.2 Sample Collection ............................................................................................................................. 72

  10.3 Collar Locations and Downhole Surveys .......................................................................................... 73

  10.4 Significant Results and Interpretation ............................................................................................... 74

• 11 Sample Preparation, Analysis and Security ............................................................ 75

  11.1 Sample Preparation for Analysis ....................................................................................................... 75

JP

Haile_NI43-101_UG_OpenPit_2023_Update_Report_USPR001819_Rev08.docx

SRK Consulting (U.S.), Inc.

NI 43-101 Technical Report - Haile Gold Mine Open Pit and Underground Update

Off-Site Sample Preparation ................................................................................................. 76

11.2 Sample Analysis ................................................................................................................................ 77

11.3 Check Assays ................................................................................................................................... 79

11.4 Quality Assurance/Quality Control Procedures ................................................................................ 79

Standards .............................................................................................................................. 79

Blanks .................................................................................................................................... 79

Duplicates .............................................................................................................................. 79

Actions and Results ............................................................................................................... 79

11.5 Opinion on Adequacy (Security, Sample Preparation, Analysis) ...................................................... 80

12 Data Verification ......................................................................................................... 81

12.1 Data Validation of Pre-Romarco Holes ............................................................................................. 81

12.2 Verification of Romarco and OceanaGold Data ................................................................................ 81

12.3 Romarco Data Verification ................................................................................................................ 82

12.4 Horseshoe Data Verification 2016 .................................................................................................... 83

12.5 Haile QA/QC ALS July 2017-January 2022 ...................................................................................... 85

July 2017- January 2022 CRM Performance ........................................................................ 85

Contamination Monitoring ..................................................................................................... 90

Statement of Data Adequacy ................................................................................................ 90

13 Mineral Processing and Metallurgical Testing ........................................................ 91

13.1 Testing and Procedures .................................................................................................................... 92

Comminution ......................................................................................................................... 92

Throughput Estimate Assumptions ....................................................................................... 97

Flotation and Cyanidation ...................................................................................................... 98

Sample Representativeness ............................................................................................... 107

13.2 Palomino Deposit ............................................................................................................................ 107

13.3 Recovery Estimate Assumptions .................................................................................................... 112

14 Mineral Resource Estimate ..................................................................................... 116

14.1 Open Pit Mineral Resources Estimate ............................................................................................ 116

Drillhole Database ............................................................................................................... 117

Geologic Model Concepts ................................................................................................... 118

Lithology .............................................................................................................................. 118

Silicification .......................................................................................................................... 118

Pyrite ................................................................................................................................... 119

Grade Domain Construction ................................................................................................ 119

Compositing ......................................................................................................................... 120

Assay Cap Values ............................................................................................................... 120

Multiple Indicator Gold Class Thresholds and Means ......................................................... 121

JP

Haile_NI43-101_UG_OpenPit_2023_Update_Report_USPR001819_Rev08.docx

March 2024

SRK Consulting (U.S.), Inc.

NI 43-101 Technical Report - Haile Gold Mine Open Pit and Underground Update

Variogram Analysis and Modeling .................................................................................. 122

Block Model .................................................................................................................... 125

Estimation Methodology Gold, Sulfur and Carbon ......................................................... 125

Estimation Methodology Silver ....................................................................................... 126

Bulk Density .................................................................................................................... 128

Resource Classification .................................................................................................. 128

Model Validation Prior and Post Estimation ................................................................... 130

Resource Model Reconciliation ...................................................................................... 134

Mineral Resource Statement .......................................................................................... 134

14.2 Underground Mineral Resource Estimate ....................................................................................... 135

Horseshoe Mineral Resource Estimate ............................................................................... 135

Palomino Mineral Resource Estimate ................................................................................. 153

14.3 Open Pit, Stockpile and Underground Combined Mineral Resource Statement ............................ 171

14.4 Relevant Factors ............................................................................................................................. 172

15 Mineral Reserve Estimate ........................................................................................ 173

15.1 Open Pit Mineral Reserve Estimate ................................................................................................ 173

Introduction .......................................................................................................................... 173

Conversion Assumptions, Parameters and Methods .......................................................... 174

Reserve Estimate ................................................................................................................ 176

15.2 Underground Mineral Reserve Estimate ......................................................................................... 177

Introduction .......................................................................................................................... 177

Conversion Assumptions, Parameters and Methods .......................................................... 177

Reserve Estimate ................................................................................................................ 179

15.3 Open Pit and Underground Combined Reserves Statement .......................................................... 180

16 Mining Methods ........................................................................................................ 181

16.1 Open Pit Mining Methods ................................................................................................................ 181

Current or Proposed Mining Methods ................................................................................. 181

Parameters Relevant to Mine or Pit Designs and Plans ..................................................... 182

Optimization ......................................................................................................................... 188

Mine Design ......................................................................................................................... 192

Overburden/Geochemical ................................................................................................... 193

Mine Production Schedule .................................................................................................. 198

Mining Fleet and Requirements .......................................................................................... 204

Labor ................................................................................................................................... 205

Mine Dewatering ................................................................................................................. 206

16.2 Underground Mining Methods ......................................................................................................... 208

Cut-off Grade Calculations .................................................................................................. 209

JP

Haile_NI43-101_UG_OpenPit_2023_Update_Report_USPR001819_Rev08.docx

SRK Consulting (U.S.), Inc.

NI 43-101 Technical Report - Haile Gold Mine Open Pit and Underground Update

Underground Geotechnical ................................................................................................. 211

Hydrogeology and Mine Dewatering ................................................................................... 238

Geochemical ........................................................................................................................ 239

Stope Optimization .............................................................................................................. 239

Mine Design ......................................................................................................................... 240

Productivities ....................................................................................................................... 248

Mine Production Schedule .................................................................................................. 249

Mining Operations ............................................................................................................... 258

Ventilation ....................................................................................................................... 267

Mine Services ................................................................................................................. 273

16.3 Combined Open Pit and Underground Production Schedule ......................................................... 274

17 Recovery Methods ................................................................................................... 277

17.1 Processing Methods ........................................................................................................................ 277

17.2 Processing Flowsheet ..................................................................................................................... 279

17.3 Operational Results ......................................................................................................................... 281

17.4 Process Unit Costs .......................................................................................................................... 284

17.5 Water Treatment Plant .................................................................................................................... 286

• 18 Project Infrastructure ............................................................................................... 288

• 18.1 Tailing Storage Facility .................................................................................................................... 288

  • 18.2 Overburden Storage ........................................................................................................................ 292

  • 18.3 Potential Acid Generating (PAG) Overburden Storage Areas ........................................................ 294

  • 18.4 Site Wide Water Management ........................................................................................................ 297

  • 18.5 Site Wide Water Balance ................................................................................................................ 299

  • 18.6 Water Supply ................................................................................................................................... 300

  • 18.7 Surface Roads and Bridges ............................................................................................................ 300

  • 18.8 Underground Access ....................................................................................................................... 300

  • 18.9 Ancillary Facilities ............................................................................................................................ 301

  18.10Power Supply .................................................................................................................................. 302

• 19 Market Studies and Contracts ................................................................................ 304

• 20 Environmental Studies, Permitting and Social or Community Impact ................ 306

  20.1 Required Permits and Status .......................................................................................................... 308

  20.2 Environmental Studies .................................................................................................................... 308

  20.3 Environmental Issues ...................................................................................................................... 308

• 21 Capital and Operating Costs ................................................................................... 309

  21.1 Capital Expenditure Estimates ........................................................................................................ 309

Basis for Capital Expenditure Estimates ............................................................................. 309

21.2 Operating Cost Estimates ............................................................................................................... 311

JP

Haile_NI43-101_UG_OpenPit_2023_Update_Report_USPR001819_Rev08.docx

March 2024

SRK Consulting (U.S.), Inc.

NI 43-101 Technical Report - Haile Gold Mine Open Pit and Underground Update

Basis for Operating Cost Estimates .................................................................................... 312

22 Economic Analysis .................................................................................................. 316

22.1 Principal Assumptions and Input Parameters ................................................................................. 316

22.2 Cashflow Forecasts and Annual Production Forecasts .................................................................. 316

Mine Production .................................................................................................................. 316

Mill Production ..................................................................................................................... 318

Revenue .............................................................................................................................. 319

Operating and Capital Costs ............................................................................................... 320

Economic Results ................................................................................................................ 321

22.3 Taxes, Royalties and Other Interests .............................................................................................. 325

22.4 Sensitivity Analysis .......................................................................................................................... 325

Operational Sensitivity ......................................................................................................... 325

Gold Price Sensitivity .......................................................................................................... 326

Discount Rate Sensitivity ..................................................................................................... 327

22.5 OceanaGold Pricing Model Result .................................................................................................. 328

• 23 Adjacent Properties ................................................................................................. 330

• 23.1 Ridgeway Mine ................................................................................................................................ 330

  • 23.2 Brewer Mine .................................................................................................................................... 330

  • 23.3 Barite Hill Mine ................................................................................................................................ 331

• 24 Other Relevant Data and Information ..................................................................... 332

• 25 Interpretation and Conclusions .............................................................................. 333

  • 25.1 Geology and Mineralization ............................................................................................................ 333

  • 25.2 Resource Estimation ....................................................................................................................... 333

    Open Pit ............................................................................................................................... 334

    Underground ........................................................................................................................ 334

  • 25.3 Status of Exploration, Development and Operations ...................................................................... 334

  • 25.4 Mining and Reserves ...................................................................................................................... 335

    Open Pit ............................................................................................................................... 335

    Underground ........................................................................................................................ 335

  • 25.5 Mineral Processing and Metallurgical Testing ................................................................................ 336

  • 25.6 Recovery Methods .......................................................................................................................... 336

  • 25.7 Project Infrastructure ....................................................................................................................... 336

    Underground Support Infrastructure ................................................................................... 336

  • 25.8 Environmental Studies and Permitting ............................................................................................ 337

  • 25.9 Economic Analysis .......................................................................................................................... 337

• 26 Recommendations ................................................................................................... 338

  26.1 Recommended Work Programs ...................................................................................................... 338

JP

Haile_NI43-101_UG_OpenPit_2023_Update_Report_USPR001819_Rev08.docx

SRK Consulting (U.S.), Inc.

NI 43-101 Technical Report - Haile Gold Mine Open Pit and Underground Update

Exploration ........................................................................................................................... 338

Resource Estimation ........................................................................................................... 338

Status of Exploration; Development and Operations .......................................................... 339

Mining and Reserves ........................................................................................................... 339

Mineral Processing and Metallurgical Testing ..................................................................... 340

Project Infrastructure ........................................................................................................... 340

Environmental Study Results .............................................................................................. 341

Economic Analysis .............................................................................................................. 342

26.2 Recommended Work Programs Costs ........................................................................................... 342

27 References ................................................................................................................ 344

28

Glossary .................................................................................................................... 347

28.1 Mineral Resources .......................................................................................................................... 347

28.2 Mineral Reserves ............................................................................................................................ 347

28.3 Definition of Terms .......................................................................................................................... 348

28.4 Abbreviations .................................................................................................................................. 349

List of Tables

Table 1-1: Open Pit Mineral Resources as of December 31, 2023 .................................................................. 19

Table 1-2: Horseshoe Underground Mineral Resource Statement as of December 31, 2023 ........................ 20

Table 1-3: Palomino Underground Mineral Resource Statement as of December 31, 2023 ........................... 21

Table 1-4: Haile Combined Open Pit and Underground Resource Statement as of December 31, 2023 ....... 22

Table 1-5: Haile Open Pit Mineral Reserves Estimate as of December 31, 2023 ........................................... 23

Table 1-6: Haile Underground Reserves Estimate as of December 31, 2023 ................................................. 24

Table 1-7: Combined OP and UG Reserve Statement for OceanaGold's Haile Gold Mine as of December 31,

2023 ..................................................................................................................................................... 24

Table 1-8: Major Equipment Required to Achieve the Mine Schedule ............................................................. 28

Table 1-9: Haile Underground Annual Production ............................................................................................ 29

Table 1-10: Combined OP and UG Production Schedule (1) ............................................................................ 31

Table 1-11: Total Capital Expenditure Summary (US$000's) .......................................................................... 33

Table 1-12: RoM Operating Cost Summary ..................................................................................................... 34

Table 1-13: RoM Indirect Costs Summary ....................................................................................................... 34

Table 1-14: Indicative Economic Results ......................................................................................................... 35

Table 2-1: Site Visit Participants ....................................................................................................................... 42

Table 7-1: Geological Summary of Major Gold Deposits of SE USA ............................................................... 55

Table 10-1: Haile Drilling Campaigns by Year, Owner and Lab ....................................................................... 71

Table 12-1: Number of Standards Inserted by Year ......................................................................................... 82

Table 13-1: Bond Ball Mill Work Indices (Wi) for Haile Samples ...................................................................... 92

JP

Haile_NI43-101_UG_OpenPit_2023_Update_Report_USPR001819_Rev08.docx

SRK Consulting (U.S.), Inc.

NI 43-101 Technical Report - Haile Gold Mine Open Pit and Underground Update

Table 13-2: Bond Rod and Ball Mill Work Indices for Haile Composite ........................................................... 92

Table 13-3: Rod and Ball Mill Work Indices for Ledbetter Extension Samples ................................................ 93

Table 13-4: Rod and Ball Mill Work and Abrasion Indices for Horseshoe Samples ........................................ 93

Table 13-5: ALS Comminution Tests on Horseshoe Samples ......................................................................... 93

Table 13-6: ALS Comminution Tests on Mill Zone Pit Samples ....................................................................... 93

Table 13-7: ALS Comminution Test Results for 2018 Infill Sample Program .................................................. 95

Table 13-8 SGS Comminution Test Results for 2022 Variability Program ....................................................... 96

Table 13-9: RDi Whole-Ore Leach Test Results .............................................................................................. 99

Table 13-10: Flotation Test Results - Averages by Grind ................................................................................ 99

Table 13-11: Flotation Test Results Average by Grade and Grind ................................................................ 100

Table 13-12: Flotation Tailing Leach Test Results Average by Grade and Grind .......................................... 100

Table 13-13: Test Results for Flotation and Leaching .................................................................................... 102

Table 13-14: Gold Recovery by Ore Zone and Ore Grade ............................................................................ 103

Table 13-15: CIL Test Results for Fine Ground Flotation Concentrate .......................................................... 103

Table 13-16: Tests Results for Composites from Mill Zone and Snake areas ............................................... 104

Table 13-17: Test Results for Horseshoe Samples ........................................................................................ 105

Table 13-18: Test Results for Horseshoe Samples ........................................................................................ 105

Table 13-19 Palomino Competency Testing Results ..................................................................................... 109

Table 13-20: Palomino Flotation Test Results ................................................................................................ 111

Table 13-21: Palomino Leach Test Results .................................................................................................... 111

Table 14-1: Sample Numbers for Gold, Silver, Sulfur and Carbon ................................................................ 118

Table 14-2: HA0922OLM_V6 Block Model Dimensions ................................................................................. 125

Table 14-3: HA0922OLM_V6 BD Assignment ............................................................................................... 128

Table 14-4: Resource Classification Parameters ........................................................................................... 129

Table 14-5: Resource Model Reconciliation ................................................................................................... 134

Table 14-6: Open Pit Total Mineral Resources as of 31 December 2023 ...................................................... 135

Table 14-7: Densities Assigned in the Block Model ....................................................................................... 141

Table 14-8: Statistics Comparison .................................................................................................................. 141

Table 14-9: D Variogram Model, with Standardized Variogram Sill ............................................................... 142

Table 14-10: Block Model Dimensions and Origin ......................................................................................... 144

Table 14-11: Estimation Parameters for Au and Ag ....................................................................................... 145

Table 14-12: Statistics Comparison between Composite vs. Block Model .................................................... 146

Table 14-13: Horseshoe Underground Mineral Resource Statement as of December 31, 2023 .................. 151

Table 14-14: Densities Assigned in the Block Model via Lithology ................................................................ 156

Table 14-15 Basic Statistics for 3 m Composites by Domain ......................................................................... 157

Table 14-16: Palomino Block Model Dimensions and Origin ......................................................................... 158

Table 14-17: Statistics of Top-Cut 3 m Composite Data within 0.8 g/t Au Threshold - High / Low Indicator

Domains ............................................................................................................................................. 159

JP

Haile_NI43-101_UG_OpenPit_2023_Update_Report_USPR001819_Rev08.docx