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Placer Gold Deposits of the Eagle Trough, Upper Yukon River Region, Alaska.

PB87189700

Publication Date	1986
Personal Author	Barker, J. C.
Page Count	28
Abstract	Gold placer deposits along the upper Yukon River, in the region between the river villages of Circle and Eagle, were investigated by the Bureau of Mines. The investigation was conducted intermittently between 1976 and 1985 as part of an evaluation of mineral resources on lands proposed for inclusion in the National Park System. At least 230,000 troy ounces (tr oz) of gold has been produced in the region, principally from Woodchopper, Coal, and Fourth of July Creeks. Placer concentrates contain several different textural forms of gold, suggesting multiple origins. Geological studies and a survey of 162 panned concentrates throughout the region indicated previously unreported sites of placer gold, and potential exists for the discovery of additional placer and lode gold. Because of nearly continuous soil and vegetation cover, further evaluation of the region will require subsurface sampling.
Keywords	Gold Mineral deposits Distribution(Property) Placer mining Land use Mineralogy Upper Yukon River Region(Alaska)
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Bureau of Mines, Fairbanks, AK. Alaska Field Operations Center.
Supplemental Notes	Library of Congress catalog card no. 86-600295.
Document Type	Technical Report
Title Note	Information circular/1986.
NTIS Issue Number	198716

Placer Gold Deposits of the Eagle Trough, Upper Yukon River Region, Alaska.

Placer Gold Deposits of the Eagle Trough, Upper Yukon River Region, Alaska.
PB87189700

Publication Date	1986
Personal Author	Barker, J. C.
Page Count	28
Abstract	Gold placer deposits along the upper Yukon River, in the region between the river villages of Circle and Eagle, were investigated by the Bureau of Mines. The investigation was conducted intermittently between 1976 and 1985 as part of an evaluation of mineral resources on lands proposed for inclusion in the National Park System. At least 230,000 troy ounces (tr oz) of gold has been produced in the region, principally from Woodchopper, Coal, and Fourth of July Creeks. Placer concentrates contain several different textural forms of gold, suggesting multiple origins. Geological studies and a survey of 162 panned concentrates throughout the region indicated previously unreported sites of placer gold, and potential exists for the discovery of additional placer and lode gold. Because of nearly continuous soil and vegetation cover, further evaluation of the region will require subsurface sampling.
Keywords	Gold Mineral deposits Distribution(Property) Placer mining Land use Mineralogy Upper Yukon River Region(Alaska)
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Bureau of Mines, Fairbanks, AK. Alaska Field Operations Center.
Supplemental Notes	Library of Congress catalog card no. 86-600295.
Document Type	Technical Report
Title Note	Information circular/1986.
NTIS Issue Number	198716