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Thawing and dredging gold at Fairbanks, Alaska
Prospect drilling with Keystone drills; greatest concentration in gold is at or near bedrock; gravel is cemented by ice and is overlain by frozen muck with ice content 20 to 80%; frozen muck stripped by hydraulic giants, sluicing muck off after thawing; thawing gravel by driving 3/4 in. pipe points at apexes of 16 ft equilateral triangles; 5 dredges handling ground up to 92 ft in depth; dredging season Apr 15 to Dec 15; steam-electric power plant.
Thawing and dredging gold at Fairbanks, Alaska
Prospect drilling with Keystone drills; greatest concentration in gold is at or near bedrock; gravel is cemented by ice and is overlain by frozen muck with ice content 20 to 80%; frozen muck stripped by hydraulic giants, sluicing muck off after thawing; thawing gravel by driving 3/4 in. pipe points at apexes of 16 ft equilateral triangles; 5 dredges handling ground up to 92 ft in depth; dredging season Apr 15 to Dec 15; steam-electric power plant.
Thawing and dredging gold at Fairbanks, Alaska
Min Met
Ogburn, R.H. (author)
1933
3 pages
Article (Journal)
English
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