Page 7 - Handbook of Gold Exploration and Evaluation

vi Contents

4.4 Entrainment, transport and sorting 225
4.5 Fluvial gold deposition 236

5 Gold exploration 267
5.1 Geological investigations 268
5.2 Exploration geochemistry 285
5.3 Remote sensing 305
5.4 Shallow land-based geophysics 314
5.5 Shallow offshore geophysics 330

6 Lateritic and alluvial gold sampling 339
6.1 Sampling criteria 340
6.2 Prospecting methods onshore 353
6.3 Prospecting methods offshore 371
6.4 Sample dressing 383
6.5 Ore resource estimation 395

7 Mine planning and practice 410

7.1 Planning 410
7.2 Operational concepts and schedules 421
7.3 Sluicing practice 439
7.4 Bucketline dredging 447
7.5 Hydraulic dredgers 474
7.6 Dry mining 477
7.7 Miscellaneous dredger types 484

8 Metallurgical process and design 488
8.1 Theory of gravity concentration 489
8.2 Flow sheet and materials balance 502
8.3 Feed preparation 505
8.4 Gravity processing 518
8.5 Lateritic gold metallurgy 546

9 Evaluation, risk and feasibility 553
9.1 Project management 554
9.2 Economic appraisal 559
9.3 Risk analysis and uncertainty 570
9.4 The feasibility study concept 593