Page 238 - Introduction to Mineral Exploration
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10: EVALUATION TECHNIQUES 221
Drill rods: each 3 m long
Air/water
Cyclone
Water
Drill truck Support truck
Sample
Drill string
Flushing with
compressed
air/water
Drill bit
Sample
FIG. 10.9 Schematic diagram and photograph showing a reverse circulation drill. The drill was exploring for
mineral sands in Western Australia (White 1989).
