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Rotary Drilling Exploration of the Ryan Lode Properties, Fairbanks Mining District, Alaska.
NTIS: PB 211 433 Available for Reference At Bureau Libraries :21 pages
A rotary-drilling exploration system was tested at the Ryan Lode, Fairbanks Mining District, Alaska, to determine its application for surface trenching and to evaluate the open-pit mining potential of a wide shear zone that contains gold-bearing gold-quartz veins. The drilling sampling system was verified as a practical substitute for surface trenching that minimized environmental damage; but where tested, the shear zone material does not contain sufficient values, together with individual vein values, for open-pit mining.
NTIS Accession No.
NTIS: PB 211 433; Available for Reference At Bureau Libraries
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division