Technical Report Tocantinzinho Project Brazil

Technical Report Tocantinzinho Project Brazil

Technical Report Tocantinzinho Project Brazil Centered on Latitude 06° 03' S and Longitude 56° 18' W Effective Date: June 21, 2019 Prepared by: Eldorado Gold Corporation 1188 Bentall 5 - 550 Burrard Street Vancouver, BC V6C 2B5 Qualified Person Company Mr. David Sutherland, P.Eng. Eldorado Gold Corporation Mr. Rafael Jaude Gradim, P.Geo. Eldorado Gold Corporation Mr. John Nilsson, P.Eng. Nilsson Mine Services Ltd. Mr. Persio Pellegrini Rosario, P.Eng. Hatch Ltd. Mr. William McKenzie, P.Eng. Global Project & Management Corporation Mr. Paulo Ricardo Behrens da Franca, AusIMM F&Z Consultoria e Projetos T OCANTINZINHO P ROJECT, B RAZIL T ECHNICAL R EPORT TABLE OF CONTENTS SECTION • 1 SUMMARY ..................................................................................................................... 1-1 1.1 Summary ........................................................................................................... 1-1 1.2 Property Description and Location .................................................................... 1-2 1.3 Accessibility, Climate, Local Resources, Infrastructure and Physiography ...... 1-3 1.4 History ............................................................................................................... 1-3 1.5 Geological Setting and Mineralization............................................................... 1-4 1.6 Exploration ........................................................................................................ 1-5 1.7 Drilling ............................................................................................................... 1-5 1.8 Sample Preparation, Analyses and Security .................................................... 1-6 1.9 Data Verification ................................................................................................ 1-6 1.10 Mineral Processing and Metallurgical Testing .................................................. 1-6 1.11 Mineral Resource Estimates ............................................................................. 1-7 1.12 Mineral Reserve Estimates ............................................................................... 1-8 1.13 Mining Methods ................................................................................................. 1-8 1.14 Recovery Methods ............................................................................................ 1-9 1.15 Project Infrastructure ....................................................................................... 1-10 1.16 Market Studies and Contracts ......................................................................... 1-11 1.17 Environmental Studies, Permitting and Social or Community Impact ............ 1-11 1.18 Capital and Operating Costs ........................................................................... 1-13 1.19 Economic Analysis .......................................................................................... 1-16 1.20 Adjacent Properties ......................................................................................... 1-17 1.21 Interpretation and Conclusions ....................................................................... 1-18 1.22 Recommendations .......................................................................................... 1-19 SECTION • 2 INTRODUCTION ............................................................................................................ 2-1 2.1 General ............................................................................................................. 2-1 2.2 Report Authors .................................................................................................. 2-1 SECTION • 3 RELIANCE ON OTHER EXPERTS ............................................................................... 3-1 SECTION • 4 PROPERTY DESCRIPTION AND LOCATION ............................................................. 4-1 4.1 Project Area and Location ................................................................................. 4-1 4.2 Land Tenure and Mining Rights in Brazil .......................................................... 4-2 4.3 Royalties ........................................................................................................... 4-4 4.4 Water Rights ..................................................................................................... 4-5 4.5 Environmental Liabilities ................................................................................... 4-5 4.6 Permitting .......................................................................................................... 4-5 SECTION • 5 ACCESSIBILITY, CLIMATE, LOCAL RESOURCES, INFRASTRUCTURE AND PHYSIOGRAPHY ......................................................................................................................... 5-1 5.1 Site Topography ................................................................................................ 5-1 5.2 Site Access ....................................................................................................... 5-1 5.3 Physiography and Climate ................................................................................ 5-2 5.4 Infrastructure ..................................................................................................... 5-8 SECTION • 6 HISTORY ....................................................................................................................... 6-1 2019 Final Report i T OCANTINZINHO P ROJECT, B RAZIL T ECHNICAL R EPORT SECTION • 7 GEOLOGICAL SETTING AND MINERALIZATION ...................................................... 7-1 7.1 Regional Geology.............................................................................................. 7-1 7.2 Local Geology ................................................................................................... 7-3 7.3 Mineralization .................................................................................................... 7-6 SECTION • 8 DEPOSIT TYPES ........................................................................................................... 8-1 8.1 Tocantinzinho Deposit ...................................................................................... 8-1 8.2 Santa Patricia .................................................................................................... 8-2 SECTION • 9 EXPLORATION ............................................................................................................. 9-1 9.1 Exploration History ............................................................................................ 9-1 9.2 Soil Geochemistry ............................................................................................. 9-2 9.3 Geophysics ....................................................................................................... 9-5 SECTION • 10 DRILLING .................................................................................................................... 10-1 10.1 Diamond Drilling .............................................................................................. 10-1 10.2 Reverse Circulation Drilling ............................................................................. 10-7 10.3 Power Auger Drilling ....................................................................................... 10-7 10.4 Diamond Drilling Logging and Sampling ......................................................... 10-8 SECTION • 11 SAMPLE PREPARATION, ANALYSES AND SECURITY ......................................... 11-1 11.1 Samples Supporting the Mineral Resource Estimate ..................................... 11-1 11.2 Samples Supporting the Exploration Results ................................................. 11-6 11.3 Adequacy Statement ....................................................................................... 11-6 SECTION • 12 DATA VERIFICATION ................................................................................................. 12-1 SECTION • 13 MINERAL PROCESSING AND METALLURGICAL TESTING .................................. 13-1 13.1 Introduction ..................................................................................................... 13-1 13.2 Metallurgical Test Work .................................................................................. 13-1 13.3 Composite and Sample Selection ................................................................... 13-2 13.4 Ore Composition ............................................................................................. 13-5 13.5 Mineralization .................................................................................................. 13-6 13.6 Comminution ................................................................................................... 13-7 13.7 Gravity Concentration ................................................................................... 13-10 13.8 Flotation ........................................................................................................ 13-12 13.9 Composition of Flotation Concentrate........................................................... 13-23 13.10 Cyanide Leaching ......................................................................................... 13-23 13.11 Cyanide Destruction ...................................................................................... 13-32 13.12 Environmental Test Work .............................................................................

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