Mine detail: Easy Junior Mine

Previously called 'Nighthawk Ridge Mine'

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Location

Lat / long:

39.18104, -115.67422

Resource(B)

Primary:	Gold
Secondary:	Silver
Tertiary:	Mercury, Thallium, Antimony, Barium-Barite
Ore:	Gold
Gangue:	Hematite, Limonite, Opal, Barite, Scorodite
Discovery year:	1986

Production

Operation type:	Surface
Deposit type:	Sediment-hosted disseminated gold
Production size:	Small
Development status:	Producer
First production started:	1989

Geology

Host rock:	Chainman Shale, Joana Limestone
Host type:	Shale,Limestone
Structure:	Nighthawk Fault, Rocks in the mine area have been affected by low amplitude, open folds with axes that strike between N-S and N15E.
Alteration processes:	Silicification is the most common alteration within the orebody. Jasperization, argillization, and decarbonization have also affected the rocks. Chainman Shale and Pilot Shale are argillized and silicified adjacent to the Nighthawk Fault.

References

DEP	10310554
Reference	{Deposit:: Carden, J.R., 1991, The Discovery and Geology of the Nighthawk Ridge Deposit at Easy Junior, White Pine County, Nevada, in Geology and Ore Deposits of the Great Basin, Raines, G.L., et al., eds., The Geological Society of Nevada, Reno, p. 665-676.}{Deposit:: NBMG, 1991, The Nevada Mineral Industry 1990, NBMG Special Publication MI-1990, p.25.}{Deposit:: Long, K.R., DeYoung, J.H., Jr., and Ludington, S.D., 1998, Database of significant deposits of gold, silver, copper, lead, and zinc in the United States; Part A, Database description and analysis; part B, Digital database: U.S. Geological Survey Open-File Report 98-206, 33 p., one 3.5 inch diskette.}
Reporter	LaPointe, D.D. , Schruben, Paul G.