Lithium Argentina AG

11/06/2026 | Press release | Distributed by Public on 11/06/2026 12:04

Cauchari-Olaroz S-K 1300 Technical Report, dated effective September 15, 2026 (Form 6-K)

Table of Contents

CERTIFICATES 1
FORWARD LOOKING STATEMENTS 13
1.0 EXECUTIVE SUMMARY 14
1.1 INTRODUCTION 14
1.2 PROPERTY DESCRIPTION, LOCATION, ACCESS AND HISTORY 14
1.3 GEOLOGICAL SETTING AND DEPOSIT TYPES 16
1.4 MINERALIZATION 17
1.5 EXPLORATION AND DRILLING 17
1.6 MINERAL PROCESSING AND METALLURGICAL TESTING 18
1.6.1 Continuing Work Plan for Supporting the Plant Operations 19
1.7 MINERAL RESOURCES AND MINERAL RESERVES 19
1.7.1 Discussion of Mineral Resource and Mineral Reserve Cut-off Grade 22
1.8 MINING METHODS 24
1.8.1 Brine Processing 24
1.8.2 Lithium Carbonate Plant Production 24
1.9 SITE INFRASTRUCTURE AND BUILDINGS 26
1.9.1 Wells 26
1.9.1.1 Well Production Equipment Selection 26
1.9.2 Evaporation Ponds 26
1.9.3 Salt Harvest Equipment 26
1.9.4 Site Infrastructure and Support Systems 27
1.9.4.1 Natural Gas Pipeline 27
1.9.4.2 Power Supply 27
1.9.4.3 Permanent Camp 27
1.9.4.4 Other Buildings 28
1.9.4.5 Security 28
1.9.4.6 Access and Site Roads 28
1.9.4.7 Fuel Storage 28
1.9.4.8 Water Supply 28
1.9.4.9 Pond Solid Wastes 29
1.9.4.10 Tailings Liquid Disposal 29
1.10 MARKET STUDIES AND CONTRACTS 29
1.11 PERMITTING, ENVIRONMENTAL STUDIES AND SOCIAL OR COMMUNITY IMPACT 29
1.11.1 Permits and Authorities 29
1.11.2 Social or Community Impact 30
1.11.3 Environmental Baseline Studies 30
1.12 CAPITAL AND OPERATING COST ESTIMATE 31
1.12.1 Capital Cost Estimate 31
1.12.2 Exclusions 32
1.12.3 Currency 32
1.12.4 Operating Cost Estimate 32
1.12.5 Sustaining Capital Expenditures (Sustaining CAPEX) 33
1.13 OTHER RELEVANT DATA AND INFORMATION 34
1.13.1 Geological Setting and Deposit Types 34
1.13.2 Mineralization 35
1.13.3 Mineral Processing and Metallurgical Testing 35
1.13.4 Mining Methods 36

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1.13.4.1 LCE Production Schedule 36
1.13.5 Recovery Methods 37
1.13.6 Site Infrastructure and Support Systems 39
1.13.7 Market Studies and Contracts 40
1.13.8 Permitting, Environmental Studies and Social or Community Impact 41
1.13.8.1 Permits and Authorities 41
1.13.8.2 Environmental Impact Assessment 42
1.13.8.3 Environmental Management Plan 42
1.13.8.4 Social Management for the Expansion 43
1.13.8.5 Closure and Reclamation Plans 43
1.13.9 Capital and Operating Cost Estimate 43
1.13.9.1 Capital Cost Estimate 43
1.13.9.2 Operating Cost Estimate 45
1.13.10 Economic Analysis 46
1.13.10.1 RIGI Economics 46
1.13.11 Sensitivity Analysis 48
1.14 CONCLUSIONS AND RECOMMENDATIONS 48
1.14.1 Conclusions 48
1.14.2 Recommendations 49
2.0 INTRODUCTION 51
2.1 TERMS OF REFERENCE 51
2.2 QUALIFIED PERSONS SITE VISITS 51
2.3 SOURCES OF INFORMATION 51
2.4 UNITS AND CURRENCY 52
3.0 PROPERTY DESCRIPTION 58
3.1 PROPERTY DESCRIPTION 58
3.2 PROPERTY AREA 60
3.3 SQM JOINT VENTURE 68
3.4 GANFENG JOINT VENTURE 68
3.4.1 Los Boros Option Agreement 68
3.4.2 Borax Argentina S.A. Agreement 69
3.4.3 JEMSE Arrangement 69
3.4.4 Corporate History of LAR 70
3.5 TYPE OF MINERAL TENURE 70
3.6 PROPERTY BOUNDARIES 70
3.7 ENVIRONMENTAL LIABILITIES 71
3.8 PERMITS 71
3.9 NEIGHBOURING COMMUNITIES 76
4.0 ACCESSIBILITY, CLIMATE, LOCAL RESOURCES, INFRASTRUCTURE, AND PHYSIOGRAPHY 77
4.1 TOPOGRAPHY 77
4.2 ACCESS 77
4.3 POPULATION 77
4.4 CLIMATE 79
4.5 PRECIPITATION 80
4.6 TEMPERATURE 82
4.7 RELATIVE HUMIDITY 85
4.8 ATMOSPHERIC PRESSURE 86
4.9 WINDS 87
4.10 SOLAR RADIATION 94

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4.11 AIR QUALITY 98
4.12 NOISE 103
5.0 HISTORY 107
6.0 GEOLOGICAL SETTING, MINERALIZATION AND DEPOSIT 110
6.1 REGIONAL STRUCTURAL AND VOLCANIC FEATURES 110
6.2 REGIONAL GEOLOGY 112
6.3 GEOLOGY OF THE OLAROZ AND CAUCHARI SALARS 113
6.3.1 Conceptual Geology 113
6.4 SALAR SURFACE SEDIMENTS AND MINERALIZATION 113
6.5 SALAR LITHOSTRATIGRAPHIC UNITS 115
6.5.1 Sedimentation Cycles 117
6.5.2 Sedimentary Facies Analysis and In-filling History 117
6.6 SURFACE WATER 125
6.7 MINERALIZATION 127
6.8 DEPOSIT TYPES 128
7.0 EXPLORATION 132
7.1 OVERVIEW 132
7.2 SURFACE BRINE PROGRAM 132
7.3 SEISMIC GEOPHYSICAL PROGRAM 133
7.4 GRAVITY SURVEY 136
7.5 TEM SURVEY 140
7.6 VERTICAL ELECTRICAL SOUNDING SURVEY (VES) 148
7.7 2019 VERTICAL ELECTRICAL SOUNDING SURVEY (VES) 155
7.8 2020 VERTICAL ELECTRICAL SOUNDING SURVEY (VES) 159
7.9 2021 VERTICAL ELECTRICAL SOUNDING SURVEY (VES) 162
7.10 2024 VERTICAL ELECTRICAL SOUNDING SURVEY (VES) 164
7.11 BOUNDARY INVESTIGATION 166
7.12 SURFACE WATER MONITORING PROGRAM 169
7.13 BRINE LEVEL MONITORING PROGRAM 180
7.14 PUMPING TEST PROGRAM 186
7.14.1 Overview 186
7.15 CHEMISTRY OF SAMPLES COLLECTED DURING PUMP TESTS 188
7.16 DRILLING 190
7.16.1 Reverse Circulation (RC) Borehole Program 2009-2010 190
7.16.2 Diamond Drilling (DDH) Borehole Program 2009-2010 195
7.16.3 Diamond Drilling (DDH) Borehole Program 2017-2019 196
7.16.4 Production Well Drilling 205
7.16.5 Exploration Diamond Drilling (DDH) Borehole and Production Well Drilling Program 2022-2024 213
7.16.6 Conclusion 213
8.0 SAMPLE PREPARATION, ANALYSES AND SECURITY 220
8.1 SAMPLING METHOD AND APPROACH 220
8.2 ROTARY DRILLING SAMPLING METHODS 220
8.3 DIAMOND DRILLING BOREHOLE SOLIDS SAMPLING METHODS 221
8.4 DIAMOND DRILLING BOREHOLE BRINE SAMPLING METHODS 223
8.5 SAMPLING PREPARATION, ANALYSIS AND SECURITY 223
8.5.1 Brine Samples from the Piezometers 223
8.5.2 Brine Samples from the Pumping Test Program 223
8.6 BRINE ANALYSIS 225
8.6.1 Analytical Methods 225
8.6.2 Sample Security 226

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8.7 SAMPLE PREPARATION ANALYSIS AND SECURITY CONCLUSIONS AND RECOMMENDATIONS 226
8.8 GEOTECHNICAL ANALYSIS 226
8.8.1 Overview 226
8.9 ANALYTICAL METHODS 227
8.9.1 Specific Gravity 227
8.9.2 Relative Brine Release Capacity (RBRC) 227
8.9.3 Particle Size Analysis 228
8.9.4 Exar Porosity Test Lab 228
9.0 DATA VERIFICATION 229
9.1 OVERVIEW 229
9.2 SITE VISITS 229
9.3 FEBRUARY 2019 SITE VISIT AND DUE DILIGENCE SAMPLING 230
9.4 JUNE 2019 SITE VISIT AND DUE DILIGENCE SAMPLING 232
9.5 QUALITY ASSURANCE/QUALITY CONTROL PROGRAM 233
9.6 PERFORMANCE OF BLANK SAMPLES 234
9.7 CERTIFIED REFERENCE MATERIALS 235
9.8 DUPLICATES 240
9.9 CHECK ASSAYS EXAR VERSUS ALEX STEWART 240
9.10 2024 QA/QC PROCEDURES 242
9.11 CONCLUSIONS AND RECOMMENDATIONS 243
10.0 MINERAL PROCESSING AND METALLURGICAL TESTING 245
10.1 POND TESTS - UNIVERSIDAD DE ANTOFAGASTA, CHILE 246
10.2 TESTS - EXAR, CAUCHARI SALAR 248
10.2.1 Salar de Cauchari Evaporation Pan and Pilot Pond Testing 248
10.2.1.1 Pond Pilot Testing 248
10.2.2 2017 Evaporation Tests 249
10.2.3 Liming Tests - Exar, Cauchari Salar 251
10.3 SOLVENT EXTRACTION TESTS - SGS MINERALS AND IIT, UNIVERSIDAD DE CONCEPCIÓN 252
10.4 CARBONATION TESTS - SGS MINERALS (CANADA) 254
10.5 PILOT PURIFICATION TESTING - SGS MINERALS 254
10.5.1 Lithium Carbonate Precipitation 257
10.6 RECENT TESTING WORK PERFORMED IN THE PILOT PLANT 258
10.6.1 Monitoring the Consumption of Lime Reagent in the Liming Plant 258
10.6.2 Lithium Losses in the Secondary Purification Filter Cake 261
10.6.3 SO₄²⁻ Adsorption During Li₂CO₃ Precipitation 262
10.6.4 Effect of Salinity on Organic Adsorption 262
10.7 RECENT WORK PERFORMED IN EXTERNAL LABORATORIES 263
10.8 CONTINUING WORK PLAN FOR SUPPORTING THE PLANT OPERATIONS 263
11.0 MINERAL RESOURCE ESTIMATES 265
11.1 OVERVIEW 265
11.1.1 Statement for Brine Mineral Prospects and Related Terms 268
11.2 MINERAL RESOURCE ESTIMATE METHODOLOGY 270
11.2.1 Most Recent Previous Mineral Resource Estimate (Burga et al., 2025) 270
11.2.2 Background of the Current Hydrostratigraphic Model 271
11.2.3 Hydrostratigraphic Units 273
11.2.4 Specific Yield 275
11.2.5 Lithium Grade 277

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11.2.6 Mineral Resource Block Model Variography, Methods, and Validation 280
11.2.7 Resource Classification 285
11.3 2026 MINERAL RESOURCE STATEMENT 288
11.4 REASONS FOR DIFFERENCES FROM PREVIOUS ESTIMATE (BURGA, 2025) 289
11.5 CONFIDENCE IN THE MINERAL RESOURCE ESTIMATE 292
12.0 MINERAL RESERVE ESTIMATE 293
12.1 BACKGROUND 293
12.2 OVERVIEW 293
12.3 CONCEPTUAL MODEL 295
12.4 NUMERICAL MODEL CONSTRUCTION 296
12.5 NUMERICAL MODEL MESH 297
12.6 NUMERICAL MODEL BOUNDARY CONDITIONS 299
12.6.1 Overview 299
12.6.2 Zero flow 300
12.6.3 Recharge 300
12.6.4 Evaporation 303
12.6.5 Archibarca Zone 305
12.7 HYDRAULIC PROPERTIES 307
12.8 PRE-DEVELOPMENT MODEL CONDITIONS 310
12.9 TRANSIENT MODEL CALIBRATION 314
12.10 2026 MINERAL RESERVE ESTIMATE MODEL RESULTS 319
12.11 STATEMENT FOR LITHIUM MINERAL RESERVE ESTIMATE 324
12.12 REASONS FOR DIFFERENCES FROM PREVIOUS ESTIMATE (BURGA, 2025) 326
12.13 RELATIVE ACCURACY IN MINERAL RESERVE ESTIMATE 327
13.0 MINING METHODS 329
13.1 PRODUCTION WELLFIELD 329
13.2 BRINE PRODUCTION UNCERTAINTIES, LIMITATIONS, AND RISK ASSESSMENT 329
13.3 WELL UTILIZATION 331
13.3.1 Well Utilization 2018 to 2025 331
14.0 PROCESSING AND RECOVERY METHODS (BRINE) 337
14.1 GENERAL 337
14.2 PROCESS DESCRIPTION 337
14.2.1 Process Block Diagram 337
14.3 BRINE CONCENTRATION PROCESS DESCRIPTION 338
14.3.1 Pond Surface Area 338
14.3.2 Pond Design 339
14.3.3 Pond Layout 342
14.3.4 Pond Transfer System 342
14.3.5 Salt Harvesting 343
14.3.6 Impurity Reduction-Liming 343
14.4 LITHIUM PLANT PROCESS DESCRIPTION 344
14.4.1 Solvent Extraction for Boron Removal 346
14.4.2 Purification Process 348
14.4.2.1 Primary Purification - Magnesium and Sulphate Reduction 348
14.4.2.2 Secondary Purification - Calcium and Sulphates Removal 349
14.4.2.3 Primary IX 350

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14.4.2.4 Carbonate Removal 351
14.4.3 Evaporation and KCl Crystallization Stage 352
14.4.3.1 Secondary IX Polishing 353
14.4.4 Lithium Carbonate Crystallization and Recovery 354
14.4.4.1 Mother Liquor Handling 356
14.4.5 Lithium Carbonate Drying, Micronization and Packaging 356
14.5 REAGENTS 358
14.6 PLANT DESIGN BASIS 359
14.7 PROCESS CONFIGURATION UPDATE 360
15.0 INFRASTRUCTURE 361
15.1 MAIN FACILITIES LOCATION 361
15.2 BRINE EXTRACTION 361
15.2.1 Brine Extraction Wells 361
15.2.2 Well Pumps 361
15.2.3 Additional Equipment in the Wellfield 362
15.2.4 Wellfield Electric Power Distribution 362
15.3 EVAPORATION PONDS 362
15.4 SALT HARVEST EQUIPMENT 364
15.5 LIMING STAGE 364
15.5.1 Quick Lime Reception 364
15.5.2 Liming System 365
15.6 LITHIUM CARBONATE PLANT 365
15.6.1 Process Facilities 365
15.6.1.1 Boron Removal - Solvent Extraction 366
15.6.1.2 Brine Purification 367
15.6.1.3 Primary Treatment 367
15.6.1.4 Secondary Treatment 367
15.6.1.5 Primary IX 367
15.6.1.6 Brine Concentration and Na/K Reduction 368
15.6.1.7 Feed Preheat 368
15.6.1.8 Multiple-Effect Evaporation and Crystallization 368
15.6.1.9 Flash-Cooled Crystallization 368
15.6.1.10 Process Condensate Collection 368
15.6.1.11 Mg/Ca Polishing IX 368
15.6.2 Lithium Carbonate Production 368
15.6.2.1 Carbonation 368
15.6.2.2 Final Product 369
15.6.3 Plant Wide Instrumentation 369
15.7 SUPPORTING SERVICES 369
15.7.1 Fresh Water 369
15.7.2 Sanitary Services 370
15.7.3 Diesel Fuel 370
15.8 PERMANENT CAMP 370
15.8.1 Other Buildings 372
15.8.2 Security 372
15.9 OFF-SITE INFRASTRUCTURE AND SUPPORT SYSTEMS 372
15.9.1 Natural Gas Pipeline 372
15.9.2 Electrical Power Supply 373
15.9.3 Water Pipeline 373
15.9.4 Control Systems and Instrumentation 373
15.9.4.1 Control and Data Building 373

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15.9.4.2 Telecommunications System 374
15.9.4.3 Control System 374
15.9.4.4 Other Systems 375
16.0 MARKET STUDIES 376
16.1 LITHIUM DEMAND 376
16.2 LITHIUM SUPPLY 378
16.3 PRICE FORECAST 381
16.4 OFFTAKE CONTRACTS 382
17.0 ENVIRONMENTAL STUDIES, PERMITTING AND PLANS, NEGOTIATIONS OR AGREEMENTS WITH LOCAL INDIVIDUALS OR GROUPS 383
17.1 EXECUTIVE SUMMARY 383
17.2 INTRODUCTION 383
17.3 ENVIRONMENTAL STUDIES 384
17.3.1 Executive Summary 384
17.3.2 Objective 384
17.3.3 Baseline Studies 385
17.3.3.1 Sources of Baseline Data 385
17.3.3.2 Methods Used for Data Collection 385
17.3.4 Environmental Impacts 387
17.3.4.1 Potential Sources of Impacts 387
17.3.4.2 Impact Evaluation Framework 387
17.3.4.3 Overview of Observed Impacts 388
17.3.4.4 Air Quality Impacts 388
17.3.4.5 Noise Impacts 388
17.3.4.6 Surface Water Quality Impacts 388
17.3.4.7 Groundwater Quality Impacts 388
17.3.4.8 Soil Quality Impacts 388
17.3.4.9 Biological Environment - Impact Overview 388
17.3.4.10 Conclusions 388
17.3.5 Monitoring Programs 388
17.3.6 Environmental Management Plan 389
17.3.6.1 Purpose of the EMP 389
17.3.6.2 Key Components of the EMP 389
17.3.6.3 Compliance with Regulations and Standards 390
17.3.6.4 Monitoring and Reporting 391
17.3.6.5 Adaptive Management and Continuous Improvement 391
17.3.6.6 Conclusions 391
17.3.6.7 Recommendations 392
17.4 PERMITTING 392
17.4.1 Executive Summary 392
17.4.2 Legal Framework 393
17.4.2.1 Permits for Exploration 393
17.4.2.2 Permits for Exploitation 393
17.4.2.3 Recent Legislation Updates 393
17.4.3 Framework Legal Study 394
17.4.4 Exploration Phase Permits for Project 395
17.4.5 Exploitation Phase Permits for Project 396
17.4.6 Water Permits 398
17.4.7 Provincial Regulations 398
17.4.8 Compliance Documentation 399
17.4.9 Permit Risks 399

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17.5 SOCIAL OR COMMUNITY IMPACT 400
17.5.1 Executive Summary 400
17.5.2 Social Baseline Context and Re-characterization - Operations Phase 400
17.5.3 Evaluation of Social Impacts - Operations Phase 400
17.5.3.1 Employment and Workforce Integration 401
17.5.3.2 Local Procurement and Economic Inclusion 401
17.5.3.3 Community Relations and Participation 401
17.5.3.4 Grievances and Social Risk Management 402
17.5.3.5 Cultural and Social Cohesion 402
17.5.4 Social Impact Management and Transition to Operations 402
17.5.5 Integration of Community Co-Creation Principles and Social Closure 403
17.5.6 Conclusions 403
17.6 CLOSURE AND RECLAMATION PLANS 403
17.6.1 Key Closure Requirements and Commitments (Pre-2023) 404
17.6.1.1 Closure Objectives 404
17.6.1.2 Financial Assurance 404
17.6.1.3 Post-Closure Monitoring 405
17.6.2 New Requirements (Decree No. 7751-DEyP-2023) 405
17.6.2.1 Closure Objectives 405
17.6.2.2 Financial Assurance 405
17.6.2.3 Post-Closure Monitoring 406
18.0 CAPITAL AND OPERATING COSTS 407
18.1 CAPITAL COSTS (CAPEX) ESTIMATE 407
18.1.1 Capital Expenditures CAPEX Definition 407
18.1.2 Evaporation Ponds 408
18.1.3 Lithium Carbonate Plant 409
18.1.4 Reagents Costs 409
18.1.5 Offsite Infrastructure Costs 409
18.1.5.1 Natural Gas Supply to Plant 410
18.1.5.2 Power Supply to Plant 410
18.1.5.3 Onsite Infrastructure and General Cost Summary 410
18.2 INDIRECT COSTS 410
18.2.1 Final CAPEX for Exar 40,000 tpa Plant 411
18.2.2 Exclusions 411
18.2.3 Currency 411
18.2.4 Sustaining Capital 411
18.3 OPERATING COSTS ESTIMATE 412
18.3.1 Operating Cost Summary 412
18.3.2 Pond and Plant Reagents Costs Definition 413
18.3.3 Pond Salt Harvesting 414
18.3.4 Solid Waste Management (Rises) 414
18.3.5 Energy Cost 414
18.3.6 Maintenance Cost 414
18.3.7 Labour Cost 414
18.3.8 Catering, Camp Services Cost, Security and Third-Party Services 414
18.3.9 General and Administrative Costs 414
18.4 COMPANY OPERATIONAL ORGANIZATION 415
19.0 ECONOMIC ANALYSIS 417
20.0 ADJACENT PROPERTIES 418

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20.1 OLAROZ PROJECT - ARCADIUM LITHIUM 418
20.2 CAUCHARI PROJECT - RIO TINTO 422
21.0 OTHER RELEVANT DATA AND INFORMATION 424
21.1 GEOLOGICAL SETTING AND MINERALIZATION 425
21.1.1 Regional Structural and Volcanic Features 425
21.1.2 Regional Geology 428
21.1.3 Geology of the Olaroz and Cauchari Salars 429
21.1.3.1 Conceptual Geology 429
21.1.4 Salar Surface Sediments and Mineralization 429
21.1.5 Salar Lithostratigraphic Units 431
21.1.5.1 Sedimentation Cycles 432
21.1.5.2 Sedimentary Facies Analysis and In-filling History 433
21.1.6 Surface Water 437
21.1.7 Mineralization 440
21.2 DEPOSIT TYPES 440
21.3 MINERAL PROCESSING AND METALLURGICAL TESTING 441
21.3.1 Introduction 441
21.3.2 Process Overview 441
21.3.2.1 Brine Evaporation 441
21.3.2.2 Purification of Brine 441
21.3.3 Solvent Extraction Test Work 441
21.3.3.1 Experimental Principle 442
21.3.3.2 Experimental Steps 442
21.3.3.3 Experimental Summary and Data 442
21.3.4 Operation Experiment of Mixed Clarification Tank 443
21.3.4.1 Experimental Results and Discussion 444
21.3.4.2 Conclusion 451
21.3.5 Lithium Carbonate 451
21.3.6 Closing Statement 452
21.4 MINING METHODS (BRINE WELLFIELD) 452
21.4.1 LCE Production Schedule 452
21.4.2 Production Well Field 453
21.4.2.1 Drilling Method 454
21.4.2.2 Well Design 455
21.4.3 Uncertainty Assessment 457
21.4.4 Well Utilization Philosophy 457
21.5 RECOVERY METHODS 459
21.5.1 General 459
21.5.2 Process Description 459
21.5.3 Pre-concentration Ponds 461
21.5.3.1 Salt Harvesting 466
21.5.3.2 Waste Salts Quantities and Areas 466
21.5.3.3 Analyses of Brine 467
21.5.4 Brine Processing Description 467
21.5.4.1 General 467
21.5.4.2 Solvent Extraction Criteria 467
21.5.5 Primary Purification 470
21.5.5.1 Boron Removal 470
21.5.5.2 Calcium Removal 471
21.5.6 Secondary Purification 473
21.5.6.1 Process Description 473

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21.5.7 Lithium Carbonate Plant 475
21.6 PROJECT INFRASTRUCTURE 476
21.6.1 General 476
21.6.2 Utilities 479
21.6.2.1 Power Supply 479
21.6.2.2 Natural Gas Supply 481
21.6.2.3 Aqueduct and Industrial Water System 482
21.6.2.4 Water Supply 484
21.6.2.5 Steam 487
21.6.2.6 Fuel Storage System 488
21.6.2.7 Sewage Treatment System 488
21.6.2.8 Reagents 488
21.6.3 Ancillary Facilities 489
21.6.3.1 Truck shops 489
21.6.3.2 Warehouses 489
21.6.3.3 Offices 489
21.6.3.4 Camp 490
21.7 MARKET STUDIES AND CONTRACTS 490
21.7.1 Lithium Demand 491
21.7.2 Lithium Supply 493
21.7.3 Price Forecast 495
21.7.4 Offtake Contracts 496
21.8 ENVIRONMENTAL STUDIES, PERMITTING AND SOCIAL COMMUNITY IMPACT 497
21.8.1 Environmental Studies and Permitting 497
21.8.1.1 Introduction 497
21.8.1.2 Legal Framework 497
21.8.1.3 Exploration Phase Permits for the Expansion 498
21.8.1.4 Exploitation Phase Permits for the Expansion 498
21.8.1.5 Water Permits 499
21.8.2 Environmental Impact Assessment 499
21.8.2.1 Introduction 499
21.8.2.2 Sources of Potential Impacts 500
21.8.2.3 Impact Evaluation Framework 500
21.8.2.4 Overview of Environmental Impacts 500
21.8.2.5 Environmental Management Plan ("EMP") 502
21.8.2.6 Monitoring and Reporting 502
21.8.3 Social or Community Relations 503
21.8.3.1 Introduction 503
21.8.3.2 Social Baseline Context and Re-characterization - Operations Phase 504
21.8.3.3 Evaluation of Social Outreach - the Expansion 504
21.8.3.4 Social Management for the Expansion 505
21.8.3.5 Community Co-Creation and Long-Term Social Sustainability 506
21.8.4 Closure and Reclamation Plans 506
21.8.4.1 Introduction 506
21.8.4.2 Closure Objectives 507
21.8.5 Effluent Generation 508
21.8.5.1 Cleaning Effluents and Sewage Liquids 508
21.8.5.2 Laboratory Effluents 508

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21.8.5.3 Effluents from Resin Regeneration for Organics Removal 508
21.8.5.4 Effluents from Truck Shop Washing Vehicles and Equipment 509
21.8.5.5 E-Liquid Industrial Waste/Residual Brines 509
21.8.6 Waste Management 510
21.8.6.1 Generation of Solid and Semi-solid Waste 510
21.9 CAPITAL AND OPERATING COSTS 510
21.9.1 Capital Cost Estimate 511
21.9.1.1 Basis of Estimate 512
21.9.1.2 Exclusions and Assumptions 512
21.9.1.3 Sustaining Capital Costs 513
21.9.1.4 Brine Well Field 513
21.9.1.5 Evaporation Ponds 513
21.9.1.6 Process Plants 514
21.9.1.7 Infrastructure and Energy 516
21.9.1.8 Salts Stockpile Area 516
21.9.1.9 Sustaining Capital 517
21.9.1.10 Owner's and Indirect Costs 518
21.9.1.11 Engineering, Procurement and Construction Services 518
21.9.1.12 Contingency 518
21.9.1.13 CAPEX Summary 518
21.9.2 Operating Costs Estimate 520
21.9.2.1 Basis of Estimate 520
21.9.2.2 Manpower 521
21.9.2.3 General and Admin Costs 521
21.9.2.4 Electric Power 522
21.9.2.5 Reagents, Fuel and Consumables 522
21.9.2.6 Ponds Harvesting and Salts Stockpile Area 523
21.9.2.7 Water 523
21.9.2.8 Camp 523
21.9.2.9 Product Transportation 524
21.9.2.10 Other Costs (General and Maintenance Supplies) 524
21.9.2.11 OPEX Summary 524
21.10 ECONOMIC ANALYSIS 525
21.10.1 Main Assumptions 526
21.10.2 Evaluation Criteria 526
21.10.3 Tax 527
21.10.3.1 Provincial Royalty 527
21.10.3.2 Export Refund 527
21.10.3.3 Tax on Debits and Credits Accounts 527
21.10.3.4 Aboriginal Programs 528
21.10.3.5 Capital Allowance 528
21.10.3.6 Corporate Taxes and VAT 528
21.10.4 Capital Expenditures 528
21.10.5 Operating Costs 529
21.10.6 Production Revenues 529
21.10.7 Cash Flow Projection 529
21.10.8 Economic Evaluation Results 531
21.10.9 Payback Analysis 531
21.10.10 Sensitivity Analysis 531
21.10.11 Discussion and Conclusions 534

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21.11 OTHER RELEVANT INFORMATION 534
21.11.1 Project Schedule 534
21.12 CONCLUSION AND RECOMMENDATIONS 537
21.12.1 Mining (Well field) 537
21.12.2 Process Information and Design 537
21.12.3 Economic Analysis 537
22.0 INTERPRETATION AND CONCLUSIONS 540
22.1 GEOLOGY AND RESOURCES 540
22.2 BRINE PRODUCTION 542
22.3 PROCESS INFORMATION AND DESIGN 542
22.4 ENVIRONMENTAL STUDIES, PERMITTING AND SOCIAL OR COMMUNITY IMPACT 543
22.5 ECONOMIC ANALYSIS 543
22.6 OTHER RELEVANT DATA AND INFORMATION 543
22.6.1 Mining (Well Field) 543
22.6.2 Process Information and Design 544
22.6.3 Economic Analysis 544
22.7 PROJECT RISKS 544
23.0 RECOMMENDATIONS 546
23.1 RECOMMENDATIONS 546
24.0 REFERENCES 547
25.0 RELIANCE ON INFORMATION PROVIDED BY THE REGISTRANT 555
APPENDIX 1. SUMMARY TABLES OF PUMPING TEST RESULTS FOR EXPLORATION AND PRODUCTION WELLS 556

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List of Tables

Table 1.1 Summary of 2026 Lithium Mineral Resource Estimate - Exclusive of Mineral Reserves (1-12) 20
Table 1.2 Summary of 2026 Mineral Reserve Estimate (1-12) 21
Table 1.3 Lithium Carbonate Plant Design Criteria 26
Table 1.4 Capital Costs Summary 32
Table 1.5 Operating Costs Summary 33
Table 1.6 Sustaining CAPEX Expenditure Schedule 34
Table 1.7 LCE Production Schedule for Both Stages 37
Table 1.8 Operating Criteria 38
Table 1.9 Five-Year Average Spot Price of Battery Grade LCE 41
Table 1.10 Capital Costs Summar 45
Table 1.11 Operating Costs Summary 46
Table 1.12 The Key Inputs to Economic Analysis 47
Table 1.13 Recommendations Budget 50
Table 2.1 Abbreviations Table 52
Table 3.1 Exar Mineral Claims 62
Table 3.2 Annual Royalties and Payments 70
Table 3.3 Exploration Permits for Cauchari-Olaroz Exploration Work 72
Table 3.4 Exploitation Permits for Cauchari-Olaroz 74
Table 4.1 Location Coordinates of the Meteorological Stations of Cauchari-Olaroz 79
Table 4.2 Distribution of Wind Frequencies by Direction and Speed from 2023 to 2025 - Davis Weather Station 87
Table 4.3 Average Monthly and Average Annual Wind Speed (km/h) from 2023 to 2025 - Davis Weather Station 90
Table 4.4 Distribution of Wind Frequencies by Direction and Speed from 2024 to 2025 - Campbell North Weather Station 91
Table 4.5 Average Monthly and Average Annual Wind Speed (km/h) Period 2024 to 2025, EM Campbell Norte 93
Table 4.6 Air Quality Guideline Levels 98
Table 4.7 Air Quality Sampling Points 99
Table 4.8 Historical Air Quality Results 101
Table 4.9 Comparison Standards for Noise Quality 103
Table 4.10 Location of Noise Quality Sampling Points 105
Table 4.11 Historical Noise Quality Results and the Thresholds Established by International Standards 105
Table 5.1 Summary of 2012 Lithium Mineral Resource for Lithium (1-4) 107
Table 5.2 Summary of 2019 Mineral Resource Estimate for Lithium (1-5) 108
Table 5.3 Summary of 2019 Estimated Proven and Probable Mineral Reserves (Without Processing Efficiency) (1-9) 108
Table 6.1 Comparative Chemical Composition of Andean Salt Pans 130
Table 7.1 Test Pit Transect Results for TDS and Lithium 168
Table 7.2 Test Pit Transect Results for TDS and Lithium with Depths 169
Table 7.3 Average Surface Water Flow Rates 172
Table 7.4 Static Water Level Measurements for the Period from January 2010 to February 2019 180
Table 7.5 Borehole Drilling Summary for the RC Borehole Program Conducted in 2009 and 2010 191
Table 7.6 Summary of Brine Samples Collected and Submitted for Laboratory Analysis from the RC and DDH Borehole Programs 192

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Table 7.7 Brine Concentrations (mg/L) and Ratios Averaged Across Selected Depth Intervals for RC Program Boreholes 193
Table 7.8 Borehole Drilling Summary for the DDH Program Conducted in 2009 and 2010 195
Table 7.9 Brine Concentrations (mg/L) Averaged Across Selected Depth Intervals for DDH Program Boreholes 196
Table 7.10 Borehole Drilling Summary for the DDH Program Conducted in 2017 and 2019 198
Table 7.11 Brine Concentrations (mg/L) Averaged Across Selected Depth Intervals for DDH Program Boreholes 2017-2019 202
Table 7.12 Production Well Drilling and Construction Details 206
Table 7.13 Borehole Drilling Summary for the DDH and Production Well Drilling Program Conducted in 2022 and 2024 214
Table 8.1 Summary Pumping Test Measurement Frequency 224
Table 8.2 Summary of Geotechnical Property Analyses 227
Table 9.1 Results of Due Diligence Sampling - February 2019 230
Table 9.2 Results of Due Diligence Sampling - June 2019 232
Table 9.3 QA/QC Sampling 233
Table 9.4 Results of Due Diligence Sampling 235
Table 9.5 Check Assay Sampling 242
Table 10.1 Monthly Evaporation Ratio 251
Table 10.2 Composition of the Brine Used for Testing SX 253
Table 10.3 Reagent Optimization in Primary Purification 260
Table 11.1 Hydrostratigraphic Units Assigned in Previous and Current Studies 273
Table 11.2 Specific Yield values assigned to the Hydrogeological Units (Mean) 275
Table 11.3 ID Interpolation Parameters 282
Table 11.4 Key Statics of Datasets Used 282
Table 11.5 Drill Platform Density and Preliminary Classification by Elevation Interval 286
Table 11.6 Summary of 2026 Lithium Mineral Resource Estimate - Exclusive of Mineral Reserves (1-12) 288
Table 11.7 Comparison Between the Current and Previous (Burga et al., 2025) Mineral Resource Estimates 290
Table 12.1 Summary of Mountain Front Recharge 301
Table 12.2 Definition Points for the Numerical Model Segments 303
Table 12.3 Summary of Assigned Aquifer Parameter Estimates 307
Table 12.4 Summary of Model Boundary Fluxes 313
Table 12.5 Projected Annual Results from 2026 Mineral Reserve Estimate Model 322
Table 12.6 Summary of 2026 Mineral Reserve Estimate (1-13) 324
Table 12.7 Comparison of Mineral Reserve Estimates - Current and Previous (Burga et al. 2025) 327
Table 13.1 Borehole Drilling Summary for Infill Producing Wells Program Conducted in 2024 332
Table 13.2 Volume Pumped per Production Well per Year and Average Flow per Year - Cauchari-Olaroz 333
Table 15.1 Production Wells Estimate 361
Table 16.1 Average Pricing Scenarios Adopted for the Economic Analysis of the Project 382
Table 17.1 Compliance with Regulations and Standards 390
Table 17.2 Summary of Key Permitting Milestones 392
Table 17.3 Key Aspects of Decree No. 7751-DEyP-2023 394
Table 17.4 Exploration Permits 395
Table 17.5 Exploitation Permits 397
Table 17.6 Industrial Water Permits and Concessions for Cauchari-Olaroz 398
Table 18.1 Lithium Carbonate Plant Capital Costs Summary 408

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Table 18.2 Production Wells Capital Cost 408
Table 18.3 Evaporation and Concentration Ponds Capital Cost 408
Table 18.4 Lithium Carbonate Plant Capital Cost Summary 409
Table 18.5 Reagent Costs 409
Table 18.6 Offsite Infrastructure Costs 410
Table 18.7 Onsite Infrastructure and General Capital Cost Summary 410
Table 18.8 Project Indirect Costs 411
Table 18.9 Operating Costs Summary 412
Table 20.1 Production From Rio Tinto's Olaroz Project - 2021 - 2023* 419
Table 20.2 Mineral Resource Estimate for Arcadium's Olaroz JV Project In Tonnes of Lithium Metal (1-10) 419
Table 20.3 Mineral Resource Estimate for Arcadium's Cauchari JV Project in Tonnes of Lithium Metal (1-7) 422
Table 20.4 Mineral Reserve Estimate for Arcadium's Cauchari JV Project in Tonnes of Lithium Metal (1-7) 423
Table 21.1 Analysis of Five-Stage Simulated Extraction Experiment 443
Table 21.2 Analysis of Five-Stage Simulated Extraction Experiment Data 443
Table 21.3 Experimental Data of PPG Li-Rich Brine Tank Extraction Operation 445
Table 21.4 Summary of Experimental Data 448
Table 21.5 Analysis of PPG Brine Feed for Extraction Batch Operation Data 449
Table 21.6 Analysis of Raffinate from Extraction Batch Operation 449
Table 21.7 Analysis Data of Stripping Solution 450
Table 21.8 LCE Production Schedule for Both Stages 452
Table 21.9 Cauchari Wells Location 456
Table 21.10 Summary of Well Management Risks and Remedies 457
Table 21.11 Operating Criteria 459
Table 21.12 Brine Chemistry Example 461
Table 21.13 Salt Quantity for the 45,000 tpa Production 466
Table 21.14 Preconcentrated Brine 467
Table 21.15 Basic Parameters of Solvent Extraction 467
Table 21.16 Material Name Basic Parameters of Solvent Extraction 469
Table 21.17 Analyses of Main Solvent Extraction Streams 469
Table 21.18 Material Balance of the Raffinate Resin Organic Removal Process 470
Table 21.19 Boron Removal Mass Balance 471
Table 21.20 Mass Balance for Ca Removal 472
Table 21.21 Material Balance of Removal CO32- 473
Table 21.22 Neutralization Process Material Balance 474
Table 21.23 Secondary Purification TOC Removal Mass Balance 474
Table 21.24 Brine Specification and Mass Balance for Ca Ion Exchange 475
Table 21.25 Secondary Purification - Boron Ion Exchange 475
Table 21.26 Lithium Carbonate Plant Mass Balance 476
Table 21.27 Power Consumption for 45,000 tpa Production 481
Table 21.28 Heat and Steam Consumption 482
Table 21.29 Raw Water Consumption for 45,000 tpa of Production 487
Table 21.30 Annual Consumptions of Reagents 488
Table 21.31 Average Pricing Scenarios Adopted for the Economic Analysis of the Project Pricing Scenarios 496
Table 21.32 5-year Average Spot Price of Battery Grade LCE 496
Table 21.33 Exploitation Permits for the Expansion 498
Table 21.34 Exploitation Permits for the Expansion 499
Table 21.35 Industrial Water Permits and Concessions for Cauchari-Olaroz Expansion 499

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Table 21.37 Capital Estimate for Evaporation Ponds and Wells 514
Table 21.38 Cost Summary of Process Plants 514
Table 21.39 Other Capital Investments 516
Table 21.40 CAPEX for The Salts Stockpile Area and Process Waste 517
Table 21.41 Sustaining CAPEX 45,000 tpa LCE 517
Table 21.42 Capital Cost Summary 519
Table 21.43 Personnel and Cost 521
Table 21.44 Electricity Consumption 522
Table 21.45 Reagents Cost Summary 523
Table 21.46 Water Use 523
Table 21.47 Annual Operating Cost Summary 524
Table 21.48 The Key Inputs to Economic Analysis 527
Table 21.49 Capital Expenditures Spend Schedule 528
Table 21.50 Discounted Cash Flow Summary 530
Table 21.51 Economic Evaluation - Case 1 (Base Case Summary) 531
Table 21.52 Sensitivity Analysis 532
Table 21.53 Discount Rate Variation 533
Table 23.1 Recommendations Budget 546

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List of Figures

Figure 1.1 Ownership Structure 16
Figure 1.2 Overall Process Block Diagram 25
Figure 1.3 Simplified Overall Process Flowsheet 38
Figure 3.1 Location of Cauchari-Olaroz 59
Figure 3.2 Exar Property Claims at Cauchari-Olaroz 61
Figure 4.1 Regional Topography and Population Centres Near Cauchari-Olaroz 78
Figure 4.2 Location of Local Meteorological Stations 80
Figure 4.3 Record of Average Monthly Rainfall for the Study Area 81
Figure 4.4 Monthly Evapotranspiration 82
Figure 4.5 Record of Average Monthly Temperatures - Davis Station 83
Figure 4.6 Record of Average Monthly Temperatures - Campbell North Station 83
Figure 4.7 Annual Maximum and Minimum Temperatures - Davis Weather Station 84
Figure 4.8 Annual Maximum and Minimum Temperatures - Campbell North Weather Station 85
Figure 4.9 Average Monthly Relative Humidity for the Study Area 86
Figure 4.10 Average Monthly Atmospheric Pressure for the Study Area 86
Figure 4.11 Wind Rose Plot - Davis Weather Station 89
Figure 4.12 Wind Speeds (km/h) 2023-2025 - Davis Weather Station 90
Figure 4.13 Average Wind Speed Records (km/h) - Davis Weather Station 91
Figure 4.14 Wind Rose Plot - Campbell North Weather Station 92
Figure 4.15 Wind Speeds (km/h) Period 2024 to 2025 - Campbell North Weather Station 93
Figure 4.16 Average Wind Speed Records (km/h) - Campbell North Weather Station 94
Figure 4.17 Monthly Solar Irradiance (MJ/m²) for the Study Area 94
Figure 4.18 Average Annual Daily Solar Irradiance (W/m2) - 2023 - 2025 - Davis Weather Station 95
Figure 4.19 Maximum Solar Radiation Recorded (W/m2) - Period 2023 - 2025 - Davis Weather Station 96
Figure 4.20 Average Annual Daily Solar Irradiance (W/m2) - Period 2024 to 2025 - Campbell North Weather Station 97
Figure 4.21 Maximum Solar Radiation Recorded (W/m²) - 2024 to 2025 - Campbell North Weather Station 98
Figure 4.22 Air Quality Sampling Points 100
Figure 4.23 Ambient Noise Sampling Points 104
Figure 4.24 Historical Noise Quality Results and the Threshold Values Established by International Regulations 106
Figure 6.1 Regional Geology in the Vicinity of the Exar Project 111
Figure 6.2 Structural Features in the Central Area of the Cauchari Basin 112
Figure 6.3 Surficial Geology in the Central Area of the Cauchari Basin 115
Figure 6.4 Facies Map of the Lower Salt Cycle Showing Line 1 Crossing a Thick Salt Succession 118
Figure 6.5 Isopleth Curves of Salt Percent in the Facies Triangle 119
Figure 6.6 Main Salt Sources of the Lower Cycle 120
Figure 6.7 Facies Map of the Upper Cycle 122
Figure 6.8 Salt Percent Isopleths of the Upper Cycle 123
Figure 6.9 Isopleth Map of Sand Percents of the Upper Cycle Sedimentation Stage 124
Figure 6.10 Caucharri-Olaroz Watershed 126
Figure 6.11 Janecke Classification of Brines 128
Figure 7.1 Seismic Tomography Lines - 2009 and 2010 134
Figure 7.2 Seismic Tomography Results for the 12 Survey Lines in Figure 7.1 135

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Figure 7.3 Location of Gravity Survey Lines at the Cauchari Salar 137
Figure 7.4 Modeling Results for the Northeast Oriented Gravity Line (Grav 1) Over the Mineral Resource Estimate 138
Figure 7.5 Modeling Results for the North-South Gravity Line (Grav 2) Across the Southwest Portion of the Mineral Resource Estimate 139
Figure 7.6 Location of TEM Sounding Profiles Conducted at the Cauchari Salar 141
Figure 7.7 2010 Survey Results for Line TEM 1 142
Figure 7.8 2010 Survey Results for Line TEM 2 143
Figure 7.9 2010 Survey Results for Line TEM 3 144
Figure 7.10 2010 Survey Results for Line TEM 4 145
Figure 7.11 2010 Survey Results for Line TEM 5 146
Figure 7.12 2017 Survey Results for Line TEM 1 147
Figure 7.13 2017 Survey Results for Line TEM 2 147
Figure 7.14 2017 Survey Results for Line TEM 3 148
Figure 7.15 2010-2011 Map of VES Survey Area 149
Figure 7.16 2010-2011 VES Survey Interpretation on the Archibarca Fan, Along Line VI 151
Figure 7.17 2010-2011 VES Survey Interpretation Along Line 2 152
Figure 7.18 2010-2011 VES Survey Interpretation Along Line 8 153
Figure 7.19 2010-2011 VES Survey Interpretation Along Line 20 154
Figure 7.20 2019 VES Survey Area 155
Figure 7.21 2019 VES Survey Interpretation Along Line A 156
Figure 7.22 2019 VES Survey Interpretation Along Line B 156
Figure 7.23 2019 VES Survey Interpretation Along Line C 156
Figure 7.24 2019 VES Survey Interpretation Along Line D 157
Figure 7.25 2019 VES Survey Interpretation Along Line E 157
Figure 7.26 2019 VES Survey Interpretation Along Line F 157
Figure 7.27 2019 VES Survey Interpretation Along Line G 158
Figure 7.28 2019 VES Survey Interpretation Along Line H 158
Figure 7.29 2019 VES Survey Interpretation Along Line I 158
Figure 7.30 2019 VES Survey Interpretation Along Line J 159
Figure 7.31 2019 VES Survey Interpretation Along Line K 159
Figure 7.32 2020 VES Survey Area 160
Figure 7.33 2020 VES Survey Interpretation Along Line A-A' 160
Figure 7.34 2020 VES Survey Interpretation Along Line B-B' 160
Figure 7.35 2020 VES Survey Interpretation Along Line C-C' 161
Figure 7.36 2020 VES Survey Interpretation Along Line D-D' 161
Figure 7.37 2020 VES Survey Interpretation Along Line E-E' 161
Figure 7.38 2020 VES Survey Interpretation Along Line F-F' 162
Figure 7.39 2020 VES Survey Interpretation Along Line G-G' 162
Figure 7.40 2021 VES Survey Area 163
Figure 7.41 2021 VES Survey Interpretation Along Line A 163
Figure 7.42 2021 VES Survey Interpretation Along Line B 164
Figure 7.43 2024 VES Survey Area 165
Figure 7.44 2024 VES Survey Interpretation 166
Figure 7.45 Boundary Investigation Map Showing Test Pit Transects and Multi-level Monitoring Well Nests 167
Figure 7.46 Surface Water Flow Monitoring Sites 171
Figure 7.47 Average Depth to Static Water Levels in Shallow Wells (50 m) 183
Figure 7.48 Average Depth to Static Water Levels in Intermediate Depth Wells (250 - 300 m) 184
Figure 7.49 Average Depth to Static Water Levels in Deep Wells (450 - 600 m) 185

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Figure 7.50 Production Wells 187
Figure 7.51 Lithium Concentrations in Samples Collected During Pump Tests 188
Figure 7.52 Lithium Concentrations in Pump Test Samples - Cauchari 189
Figure 7.53 Lithium Concentrations in Pump Test Samples - Olaroz 190
Figure 7.54 Black Sand in DD19D-001 200
Figure 7.55 Borehole Locations and Associated Drilling Platforms 201
Figure 7.56 Pumping Well W18-05 205
Figure 7.57 Pumping Well Locations 212
Figure 7.58 DD19D-05 Lithological Profile 215
Figure 7.59 DD19D-06 Lithological Profile 215
Figure 7.60 DD19D-07 Lithological Profile 216
Figure 7.61 DD19D-08 Lithological Profile 216
Figure 7.62 DD19D-11 Lithological Profile 217
Figure 7.63 DD19D-13 Lithological Profile 217
Figure 7.64 DD19D-15 Lithological Profile 218
Figure 7.65 DD19D-26 BIS Lithological Profile 218
Figure 7.66 2022-2024 Drill Hole Locations 219
Figure 8.1 Rock Chip Tray with Dry and Wet Samples 221
Figure 8.2 Collecting an Undisturbed Sample 222
Figure 8.3 Collecting an Undisturbed Sample from Core 222
Figure 8.4 Measuring Sediment in an Imhoff Cone 224
Figure 9.1 Due Diligence Sample Results for Lithium: February 2019 231
Figure 9.2 Due Diligence Sample Results for Lithium: June 2019 233
Figure 9.3 Performance of Lithium Blank Samples 234
Figure 9.4 Performance of Patron A 236
Figure 9.5 Performance of Patron B 236
Figure 9.6 Performance of Patron C 237
Figure 9.7 Performance of Standard A 237
Figure 9.8 Performance of Patron AA 238
Figure 9.9 Performance of Patron BB 238
Figure 9.10 Performance of Patron CC 239
Figure 9.11 Performance of Standard AA 239
Figure 9.12 Duplicate Samples - Exar Laboratory 240
Figure 9.13 Check Assays - Exar Laboratory Versus ASA Laboratories 241
Figure 9.14 Check Assays - Exar Laboratory Versus ASA Laboratories - November 2023 242
Figure 9.15 Lithium Values in Well PB-4 2020-2025 243
Figure 10.1 Evaporation Pans and Lamps 246
Figure 10.2 Dry Air Evaporation Tests 247
Figure 10.3 Li Concentration Changes in the Brine During the Evaporation Process 247
Figure 10.4 Pilot Ponds 249
Figure 10.5 Brine Evaporation 250
Figure 10.6 Water Evaporation 250
Figure 10.7 Sedimentation Rate of Limed Pulps with Different Amounts of Excess Lime 252
Figure 10.8 Extraction Isotherm at 20ºC Using Mixed Extractants 253
Figure 10.9 Re-extraction Isotherm at 20ºC Using Mixed Extractants 254
Figure 10.10 Pilot Plant (SX-Purification-Carbonation-Filtration-Washing Pulp) 255
Figure 10.11 SX Process Boron Extraction Efficiency 256
Figure 10.12 Ca and Mg Precipitation Efficiency 257
Figure 10.13 Li Precipitation Efficiency 258
Figure 10.14 Sulphate-Calcium Equilibrium Curve 259

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Figure 10.15 Example of Economic Optimization Curve 261
Figure 10.16 Equilibrium Curve of Li2CO3 Versus Ca and CO3 262
Figure 10.17 Graph of Total Organic Carbon Versus Salinity 263
Figure 11.1 Location Map for Mineral Resource Estimate 267
Figure 11.2 Methodology for Evaluating Brine Mineral Resources and Mineral Reserves 269
Figure 11.3 Representative Plan and Section Views of the 2019 Measured, Indicated, and Inferred Mineral Resource Estimate 271
Figure 11.4 Vertical Cross Sections and Aerial View Showing the Distribution of the Hydrogeostratigraphic Units 274
Figure 11.5 Drill Hole Locations Where Porosity Analyses Were Conducted 276
Figure 11.6 Lithium Grade Interpolation for the Current Mineral Resource Estimate 279
Figure 11.7 Modelled Variogram for Li and 2-D Variogram and Directional Variograms for the Li-Domain 280
Figure 11.8 Swath Plot in X for Li Domain 283
Figure 11.9 Swath Plot in Y for Li Domain 284
Figure 11.10 Swath Plot in Z for Li Domain 285
Figure 11.11 Representative Cross Sections and Aerial View of the 2026 Measured, Indicated, and Inferred Mineral Resource Estimate 287
Figure 11.12 Comparison Between the Extension of the Current and Previous (Burga, 2025) Mineral Resource Estimates 291
Figure 12.1 Conceptual Model and Model Boundary Conditions 296
Figure 12.2 Numerical Model Grid with Inactive Cells 298
Figure 12.3 Vertical Discretization of the Geological Model in Leapfrog (top) Versus the Numerical Flow Model in GWV (bottom) 299
Figure 12.4 Direct and Lateral Precipitation Recharge Zone in the Numerical Model 302
Figure 12.5 Distribution of Evaporation Zones in the Numerical Model 304
Figure 12.6 Cells Defined with a Drain Boundary Condition to Represent the Saline Interface and Lagoon Outcrop Zone 306
Figure 12.7 Hydraulic Conductivity (m/d) for Each Model Layer 309
Figure 12.8 Piezometric Surface of the Pre-Development Model 311
Figure 12.9 Distribution of the Residuals 312
Figure 12.10 Observed Versus Calculated Residuals with Calibration Statistics for the Pre-development Model 313
Figure 12.11 Head Residuals Histogram 314
Figure 12.12 Hydraulic Conductivity Comparison Between the Pumping Test Analysis and the Model Calibrated Parameters 315
Figure 12.13 Observed Versus Calculated Piezometric Levels for the Transient Model at October 2023 316
Figure 12.14 Distribution of the Residuals for October 2023 317
Figure 12.15 Head Residuals Histogram 318
Figure 12.16 Average Lithium Grades from Production Wells Production Wells (2018-2025) 319
Figure 12.17 Maximum Drawdown Predicted at the Upper Part of the Aquifer for Year 2060 321
Figure 12.18 Temporal Evolution of the Averaged Lithium Concentration Extracted from the Wellfield 323
Figure 12.19 Annual Total LCE Production from the Wellfield 323
Figure 13.1 Production Wells - Pumped Volumes per Well per Year 334
Figure 13.2 Location of Production Wells 335
Figure 13.3 Location of Production Wells Showing 2019 Mineral Resource Area 336
Figure 14.1 Process Block Diagram 338

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Figure 14.2 Evaporation Ponds at Cauchari Salar 340
Figure 14.3 Testing of Berm Material 341
Figure 14.4 Evaporation Ponds - Close Up 341
Figure 14.5 Evaporation Ponds 342
Figure 14.6 Evaporation Ponds - Transfer Pump Station 343
Figure 14.7 Lithium Plant Block Diagram 345
Figure 14.8 Boron Solvent Extraction 347
Figure 14.9 Brine Purification Processing Circuit Diagram 348
Figure 14.10 Primary Purification Processing Circuit Diagram 349
Figure 14.11 Secondary Purification Processing Circuit Diagram 350
Figure 14.12 Primary IX Circuit Diagram 351
Figure 14.13 Carbonate Removal Circuit Diagram 352
Figure 14.14 Evaporation and KCl Crystallization Diagram 353
Figure 14.15 Secondary IX Polishing Diagram 354
Figure 14.16 Lithium Carbonate Crystallization Diagram 355
Figure 14.17 Lithium Carbonation Reactor Diagram 356
Figure 14.18 Mother Liquor Diagram 356
Figure 14.19 Lithium Carbonate Drying, Micronization and Packaging Diagram 358
Figure 15.1 Aerial View - Main Facilities 363
Figure 15.2 Aerial View of Evaporation Ponds 364
Figure 15.3 Process Facility Flow Diagram 366
Figure 15.4 Project Infrastructure Camp General Layout 371
Figure 16.1 Lithium Demand in Batteries (2024) 376
Figure 16.2 EV Penetration Rate Forecast 377
Figure 16.3 BESS Global Demand Growth 378
Figure 16.4 Lithium Production (2024) by Country 379
Figure 16.5 Lithium Supply Forecast per Resource Type 380
Figure 16.6 Lithium Supply Forecast per Country 380
Figure 16.7 Projected Pricing for Battery-Quality Lithium Carbonate Used in Economic Model 381
Figure 18.1 Project Organization 416
Figure 20.1 Olaroz Project Production - 2016-2021 418
Figure 20.2 Olaroz Project - Evaporation Ponds and Facilities 420
Figure 20.3 Adjacent Properties Showing Boundary with the Exar Property 421
Figure 21.1 Structural Features in the Central Area of the Cauchari Basin 427
Figure 21.2 Regional Geology in the Vicinity of the Exar Project 428
Figure 21.3 Surficial Geology in the Central Area of the Cauchari Basin 431
Figure 21.4 Facies Map of the Lower Salt Cycle Showing Line 1 Crossing a Thick Salt Succession 434
Figure 21.5 Isopleth Curves of Salt Percent in the Facies Triangle 435
Figure 21.6 Main Salt Sources of the Lower Cycle 436
Figure 21.7 Caucharri-Olaroz Watershed 439
Figure 21.8 Lithium Yield of PPG Li-Rich Brine 446
Figure 21.9 Lithium Content in Raffinate and Organic Phase 446
Figure 21.10 Continuous Extraction Device Diagram 451
Figure 21.11 General Wells Layout 454
Figure 21.12 Well Design 455
Figure 21.13 Simplified Overall Process Flowsheet 460
Figure 21.14 Evaporation Ponds Process 461
Figure 21.15 Accumulation Ponds Schematics 462
Figure 21.16 Layout of Evaporation Ponds and Salt Stockpiles 464

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Figure 21.17 Evaporation Ponds Schematic and Detailed Designs 465
Figure 21.18 Location of the Expansion Solid Waste Deposit 472
Figure 21.19 Locations of Infrastructure for the Pre-existing Project and the Expansion Project 478
Figure 21.20 Location of Water System for Stage II Expansion 483
Figure 21.21 Reverse Osmosis Plant Scheme 485
Figure 21.22 Lithium Demand in Batteries 491
Figure 21.23 EV Penetration Rate Forecast 492
Figure 21.24 BESS Global Demand Growth 492
Figure 21.25 Lithium Supply Forecast per Resource Type 494
Figure 21.26 Lithium Supply Forecast per Country Type 494
Figure 21.27 Projected Pricing for Battery-Quality Lithium Carbonate Used in Economic Model 495
Figure 21.28 Capital Cost Distribution for Stage II Expansion 519
Figure 21.29 OPEX Distribution for Stage II Expansion 525
Figure 21.30 After-Tax NPV Sensitivity to CAPEX, OPEX and Price Variation 532
Figure 21.31 After-Tax IRR Sensitivity to CAPEX, OPEX and Price Variation 533
Figure 21.32 Project Schedule 536

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CERTIFICATES

CERTIFICATE OF QUALIFIED PERSON

MARK KING, PHD, P.GEO., FGC

I, Mark King, P. Geo., do hereby certify that:

1. I am an independent geological consultant contracted by Lithium Argentina AG. I am President and Senior Hydrogeologist with Groundwater Insight Inc., 3 Melvin Road, Halifax, Nova Scotia, B3P 2H5, telephone 902 223 6743, email [email protected].

2. This certificate applies to the technical report titled "2026 Cauchari-Olaroz S-K 1300 Technical Report, Jujuy Province, Argentina," (the "Technical Report") with an effective date of September 15, 2026.

3. I have the following academic and professional qualifications and experience:

a. Academic

i. B.Sc. (Geology), Dalhousie University, Halifax, Nova Scotia, 1982

ii. M.A.Sc. (Civil Eng.), Technical University of Nova Scotia, 1987

iii. Ph.D. (Earth Science), University of Waterloo, Waterloo, Ontario, 1997

b. Professional

i. Registered Professional Geoscientist (PGeo) of Nova Scotia (membership #84); Serving on Admissions Board of the Association for 15+ years

ii. Member of Association of Groundwater Scientists and Engineers (membership #3002241)

iii. Member of Canadian Institute of Mining (CIM) (membership 758876)

c. Experience and Areas of Specialization Relevant to this Technical Report

i. Technical involvement in lithium brine projects for the past 15 years, ranging from NI43-101 Reporting to Due Diligence, 40+ brine projects in Chile, Argentina, Nevada, Utah, California, Mongolia, and Germany

ii. Co-author - CIM Leading Practice Guidelines for Salar-Hosted Lithium Brine MRMR Estimation (Draft, 2025)

iii. Numerical modelling of groundwater flow and solutes in groundwater

iv. Field delineation and monitoring of solutes in groundwater

v. 35 years of experience in groundwater quality and quantity projects.

I have read the definition of "qualified person set out in S-K 1300 and certify that, by reason of my education, affiliation with a professional association and past relevant work experience, I fulfill the requirements to be a "qualified person" for the purposes of S-K 1300.

4. I visited the Property that is the subject of this Technical Report on several occasions, the most recent being in 2012.

5. I am responsible for Sections 11 and 12, along with those sections of the Summary pertaining thereto.

6. I have had prior involvement with the Property that is the subject of this Technical Report. That involvement was as an author on the Technical Reports titled "Feasibility Study Reserve Estimation and Lithium Carbonate and Potash Production at the Cauchari-Olaroz Salars, Jujuy Province, Argentina," with an effective date of July 11, 2012; "Updated Feasibility Study and Reserve Estimation and Lithium Carbonate Production at the Cauchari-Olaroz Salars, Jujuy Province, Argentina", with an effective of March 29th, 2017; "2026 Cauchari-Olaroz S-K 1300 Technical Report, Jujuy Province, Argentina" and "2026 Cauchari-Olaroz NI 43-101 Technical Report, Jujuy Province, Argentina", both reports with an effective date of February 27, 2026.

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7. As of the Effective Date of this technical report, to the best of my knowledge, information and belief, the Technical Report contains all scientific and technical information that is required to be disclosed to make the Technical Report not misleading.

Effective Date: September 15, 2026

Signing Date: November 6, 2026

{SIGNED AND SEALED} [Mark King]

_______________________________

Mark King, P.Geo.

Lithium Argentina AG., 2026 Cauchari-Olaroz S-K 1300 Technical Report
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CERTIFICATE OF QUALIFIED PERSON

DAVID BURGA, P.GEO.

I, David Burga, P. Geo., residing at 3884 Freeman Terrace, Mississauga, Ontario, do hereby certify that:

1. I am an independent geological consultant contracted by Lithium Argentina AG.

2. This certificate applies to the technical report titled "2026 Cauchari-Olaroz S-K 1300 Technical Report, Jujuy Province, Argentina," (the "Technical Report") with an effective date of September 15, 2026.

3. I am a graduate of the University of Toronto with a Bachelor of Science degree in Geological Sciences (1997). I have worked as a geologist for a total of 22 years since obtaining my B.Sc. degree. I am a geological consultant currently licensed by Professional Geoscientists Ontario (License No 1836). I have read the definition of "qualified person" set out in S-K 1300 and certify that, by reason of my education, affiliation with a professional association and past relevant work experience, I fulfill the requirements to be a "qualified person" for the purposes of S-K 1300. My relevant experience for the purpose of the Technical Report is:

Exploration Geologist, Cameco Gold 1997-1998
Field Geophysicist, Quantec Geoscience 1998-1999
Geological Consultant, Andeburg Consulting Ltd. 1999-2003
Geologist, Aeon Egmond Ltd. 2003-2005
Project Manager, Jacques Whitford 2005-2008
Exploration Manager - Chile, Red Metal Resources 2008-2009
Consulting Geologist 2009-Present

4. I have visited the Property that is the subject of this Technical Report on January 24, 2017, February 19-21, 2019, June 10-12, 2019, and November 19-21, 2024.

5. I am responsible for Sections 2 to 9, 20, 22, 27, and co-author for Sections 1, and 21 to 24 of the Technical Report along with those sections of the Summary pertaining thereto.

6. I have had prior involvement with the Property that is the subject of this Technical Report. That involvement was as an author on the technical report titled "2026 Cauchari-Olaroz S-K 1300 Technical Report, Jujuy Province, Argentina" and "2026 Cauchari-Olaroz NI 43-101 Technical Report, Jujuy Province, Argentina", both reports with an effective date of February 27, 2026; "Operational Technical Report at the Cauchari-Olaroz Salars, Jujuy Province, Argentina," with an effective date of December 31, 2024; "Updated Feasibility Study and Mineral Reserve Estimation to Support 40,000 tpa Lithium Carbonate Production at the Cauchari-Olaroz Salars, Jujuy Province, Argentina", (the "Technical Report") with an effective of September 30th, 2020; "Updated Mineral Resource Estimate for Cauchari-Olaroz, Jujuy Province, Argentina" (the "Technical Report") with an effective of March 1st, 2019; and the technical report titled "Updated Feasibility Study and Reserve Estimation and Lithium Carbonate Production at the Cauchari-Olaroz Salars, Jujuy Province, Argentina", (the "Technical Report") with an effective of March 29th, 2017.

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7. As of the effective date of this technical report, to the best of my knowledge, information and belief, the Technical Report contains all scientific and technical information that is required to be disclosed to make the Technical Report not misleading.

Effective Date: September 15, 2026

Signing Date: November 6, 2026

{SIGNED AND SEALED} [David Burga]

_______________________________

David Burga, P.Geo.

Lithium Argentina AG., 2026 Cauchari-Olaroz S-K 1300 Technical Report
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CERTIFICATE OF QUALIFIED PERSON

MAREK DWORZANOWSKI, EUR ING CENG

I, Marek Dworzanowski, EUR ING, CEng, BSc(Hons), FIMMM, HonFSAIMM residing at 25 Rue Paul Doumer, 22950, Tregueux, France, do hereby certify that:

1. I am an independent process consultant contracted by Lithium Argentina AG.

2. This certificate applies to the technical report titled "2026 Cauchari-Olaroz S-K 1300 Technical Report, Jujuy Province, Argentina," (the "Technical Report") with an effective date of September 15, 2026.

3. I graduated from the University of Leeds, United Kingdom, with a BSc (Honours) in Mineral Processing in July 1980. In March 2016, I was appointed as a Visiting Adjunct Professor in Metallurgical Engineering, University of Witwatersrand, South Africa.

4. I became a Fellow of the Southern African Institute of Mining and Metallurgy (SAIMM) in 2006 and my membership number is 19594. I became a Fellow of the Institute of Materials, Minerals and Mining (IMMM) in 2020 and my membership number is 485805. I became a Chartered Engineer (CEng) with the Engineering Council of the United Kingdom in 2020, and my registration number is 357983. I became a European Engineer (EUR ING) in 2022, and my registration number is 34956.

5. I have read the definition of "qualified person" (QP) set out in S-K 1300 and by reason of my education, affiliation with a professional association and past relevant work experience, I fulfill the requirements to be a QP for the Technical Report.

6. I have over 40 years of experience in the mining industry during which time I gained a considerable amount of diverse experience in various senior roles within the areas of mineral processing and hydrometallurgy, production, project execution, project studies, technical consulting and research and development. My relevant experience in lithium brine projects for the purpose of the Technical Report includes operational reviews of producing lithium plants, process consulting support and acting as QP for a number of lithium brine projects including: Minera Salar Blanco Maricunga Project PEA and DFS (Chile), Millennial Lithium Pastos Grandes Project PEA and DFS (Argentina), Advantage Lithium Cauchari Project PEA and PFS (Argentina), NeoLithium 3Q Project DFS (Argentina), Standard Lithium Lanxess Smackover Project PEA (USA) and Standard Lithium SWA Project PFS (USA).

7. I have had prior involvement with the Property that is the subject of this Technical Report. That involvement was as an author on the technical report titled "2026 Cauchari-Olaroz S-K 1300 Technical Report, Jujuy Province, Argentina" and "2026 Cauchari-Olaroz NI 43-101 Technical Report, Jujuy Province, Argentina", both reports with an effective date of February 27, 2026; "Operational Technical Report at the Cauchari-Olaroz Salars, Jujuy Province, Argentina," with an effective date of December 31, 2024; and "Updated Feasibility Study and Mineral Reserve Estimation to Support 40,000 tpa Lithium Carbonate Production at the Cauchari-Olaroz Salars, Jujuy Province, Argentina", (the "Technical Report") with an effective date of September 30th, 2020.

8. I visited the property that is the subject of the Technical Report on 10 September 2025.

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9. I am responsible for Section 10 and Section 14 of the Technical Report along with those sections of the Summary pertaining thereto.

10. As of the effective date of this technical report, to the best of my knowledge, information and belief, the Technical Report contains all scientific and technical information that is required to be disclosed to make the Technical Report not misleading.

Effective Date: September 15, 2026

Signing Date: November 6, 2026

{SIGNED AND SEALED} [Marek Dwarzanowski]

_______________________________

Marek Dwarzanowski, EUR ING CEng

Lithium Argentina AG., 2026 Cauchari-Olaroz S-K 1300 Technical Report
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CERTIFICATE OF QUALIFIED PERSON

JONATHAN GIBSON P.ENG. - MINING ENGINEER/QP

I, Jonathan Gibson P.Eng., residing at 1343 Queenston Road, Cambridge, Ontario, do hereby certify that:

1. I am an mining and mineral processing engineering consultant contracted by Lithium Argentina AG.

2. This certificate applies to the technical report titled "2026 Cauchari-Olaroz S-K 1300 Technical Report, Jujuy Province, Argentina," (the "Technical Report") with an effective date of September 15, 2026.

3. I am a graduate of Dalhousie University with a Bachelor of Engineering degree in Mining, Mineral Processing and Oil & Gas (2007). I have worked as a Mining and Mineral Processing Engineer for a total of 18 years since obtaining my B.Eng. degree. I am a professional mining engineer currently licensed by the Professional Engineers of Ontario as well as the Association of Professional Engineers of Nova Scotia (License No 100126726 and 20230175 respectively). I have read the definition of "qualified person set out in S-K 1300 and certify that, by reason of my education, affiliation with a professional association and past relevant work experience, I fulfill the requirements to be a "qualified person" for the purposes of S-K 1300. My relevant experience for the purpose of the Technical Report is:

Mining and Mineral Processing Engineer, Vale 2007-2012
Independent Professional Mining and Mineral Processing Engineer, Optimineral 2012-present
Consulting Mining and Mineral Processing Engineer, BBA 2020-2021
Consulting Mining and Mineral Processing Engineer, CSU Projects 2023-present

I have participated in well over 2 dozen various technical reports (from prefeasibility to FEL 0-4, Multi-Discipline Engineering Reports, Trade-off studies, mineral processing flowsheet adaptations (including the supporting laboratory R&D), Backfill and mine ventilation capital projects to start-up/commissioning of material handling circuits and several mine closure plans) as well as being the QP of record and/or author of over half a dozen SEC reported technical reports (Vale, CSU Projects & BBA).

4. I have not visited the Property that is the subject of this Technical Report.

5. I am responsible for Sections 12, 13, 15, and 16, and co-author for Section 19 and of the Technical Report along with those sections of the Summary pertaining thereto.

I have had prior involvement with the Property that is the subject of this Technical Report. That involvement was as an author on the technical report titled "2026 Cauchari-Olaroz S-K 1300 Technical Report, Jujuy Province, Argentina" and "2026 Cauchari-Olaroz NI 43-101 Technical Report, Jujuy Province, Argentina", both reports with an effective date of February 27, 2026.

6. As of the effective date of this technical report, to the best of my knowledge, information and belief, the Technical Report contains all scientific and technical information that is required to be disclosed to make the Technical Report not misleading.

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Effective Date: September 15, 2026

Signing Date: November 6, 2026

{SIGNED AND SEALED} [Jonathan Gibson]

_______________________________
Jonathan Gibson, P.Eng.

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CERTIFICATE OF QUALIFIED PERSON

ALEXANDER M. L. CUSHING, P.ENG.

I, Alexander Cushing, P. Eng., residing at 243 Albright Road, Hamilton, Ontario, do hereby certify that:

1. I am an independent mineral processing, metallurgical and mineral economics consultant contracted by Lithium Americas (Argentina) Corp.

2. This certificate applies to the technical report titled "2026 Cauchari-Olaroz S-K 1300 Technical Report, Jujuy Province, Argentina," (the "Technical Report") with an effective date of September 15, 2026.

3. I am a graduate of McMaster University with a Bachelor of Engineering degree in Chemical Engineering (2011), Queen's University, Kingston with a Master of Applied Science (2014) and Doctorate of Philosophy (2018) in Mining Engineering, and the University of Toronto with a Master of Finance. I have worked as an engineer for over 10 years since obtaining my B.Eng degree. I am an engineering consultant currently licensed by Professional Engineers Ontario (License No 100555075). I have read the definition of "qualified person" set out in S-K 1300 and certify that, by reason of my education, affiliation with a professional association and past relevant work experience, I fulfill the requirements to be a "qualified person" for the purposes of S-K 1300. My relevant experience for the purpose of the Technical Report is:

Metallurgist, SGS Lakefield 2018 - 2020
Consulting Engineer, Ioniq (formerly CSU Projects) 2020 - 2021
Senior Analyst, Vale Canada 2021 - 2022
Consulting Engineer, Ioniq (formerly CSU Projects) 2022 - Present

4. I have not visited the Property that is the subject of this Technical Report.

5. I am responsible for Sections 16 and 18, and co-author for Sections 1, 21 to 24 of the Technical Report along with those sections of the Summary pertaining thereto.

6. I have had prior involvement with the Property that is the subject of this Technical Report. That involvement was as an author on the technical report titled "2026 Cauchari-Olaroz S-K 1300 Technical Report, Jujuy Province, Argentina" and "2026 Cauchari-Olaroz NI 43-101 Technical Report, Jujuy Province, Argentina", both reports with an effective date of February 27, 2026.

7. As of the effective date of this technical report, to the best of my knowledge, information and belief, the Technical Report contains all scientific and technical information that is required to be disclosed to make the Technical Report not misleading.

Effective Date: September 15, 2026

Signing Date: November 6, 2026

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{SIGNED AND SEALED} [Alexander Cushing]

_______________________________

Alexander Cushing, P.Eng.

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CERTIFICATE OF QUALIFIED PERSON

JAMES WANG, P.E.

As the co-author of the report titled "2026 Cauchari-Olaroz S-K 1300 Technical Report, Jujuy Province, Argentina," (the "Technical Report") with an effective date of September 15, 2026, I, James Wang, P.E., do hereby certify that:

1. I am a director and executive consultant with Golder Associates, a wholly owned division of WSP Global Inc. (local office address: 1111 Azia Center, Beijing, China; head office address: 1600 Rene Levesque Blvd. West, Montreal, QC H3H 1P9, Canada). My listed home address is 891 Miami Ridge Drive, Loveland, Ohio, U.S.A.

2. Since graduating with a Bachelor's degree in civil engineering in China in 1992 and a Master's degree in geotechnical engineering in the U.S. in 1994, I have practiced my profession continuously for 30 years. I have held positions with D'Appolonia Consultants, Terracon Consultants, Golder Associates, and WSP Golder in the U.S. and China. I have been a registered Professional Engineer (P.E.) with the State of Ohio (Registration #63824) since 1999 and a registered Professional Engineer (P.E.) with the State of West Virginia (Registration #15545) since 2002.

3. Over the past 31 years, I have completed over 90 projects in the mining sector in the Americas, Asia, and Africa. My areas of expertise include geotechnical/mining engineering, hydrogeology, process engineering, mining technical economics and valuation, and mine waste disposal. Over the past 12 years, I have served as the project director and Qualified Person for over 10 large size lithium brine projects in Argentina and Chile. I have also managed technical due diligence reviews on over 12 lithium projects (both brine projects and hard rock projects) in the Americas over the past 15 years for mining companies and investment funds.

4. I have read the definition of "qualified person" set out in S-K 1300 and certify that and by reason of my education, past relevant experience, professional registrations, and affiliation with professional associations I fulfill the requirements to be a "Qualified Person" for the purposes of S-K 1300.

4. I have not visited the Property that is the subject of this Technical Report.

5. As a qualified person (QP) for this project, I have been responsible for authoring or co-authoring Sections 17 and 21 of this Technical Report along with those sections of the Executive Summary pertaining thereto.

6. As for the effective date of this technical report, to the best of my knowledge, information and belief, the Technical Report contains all scientific and technical information that is required to be disclosed to make the Technical Report not misleading.

Effective Date: September 15, 2026

Signing Date: November 6, 2026

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{SIGNED AND SEALED} [James Wang]

__________________________________

Signature of James Wang, P.E.

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Lithium Argentina AG published this content on November 06, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on November 06, 2026 at 18:04 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]