Mine detail: Surprise, Labrador, Bailey Day Mine Area

Previously called 'Bailey Day Claim GroupAngela claim group'

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Location

Lat / long:

40.63129, -117.02872

Resource(M)

Primary:	Gold
Secondary:	Silver, Copper, Lead
Tertiary:	Iron
Ore:	Gold, Pyrite, Chalcopyrite, Chrysocolla, Malachite, Azurite, Tenorite, Limonite, Hematite
Gangue:	Chlorite, Quartz, Calcite, Epidote, Garnet, Diopside, Clay, Goethite
Orebody form:	tabular
Discovery year:	1934

Production

Operation type:	Surface-Underground
Deposit type:	vein associated with a fault zone
Production size:	Small
Development status:	Past Producer
Production years:	1937, 1938, 1941, 1945, 1947, 1954, 1987-1993
First production started:	1934
Last production ended:	2004

Geology

Host rock:	Harmony Formation, Battle Formation, Antler Peak Limestone
Host type:	Sandstone,Shale,Skarn (Tactite),Conglomerate,Hornfels
Associated rock:	Battle Formation, Antler Peak Limestone
Associated type:	Conglomerate,Limestone,Porphyry,Granodiorite
Structure:	Numerous regional scale thrust faults are present in the mine area, in particular along the contact between the Harmony and Battle Formations, The NNE-striking Copper King fault zone and the WNW-striking Surprise fault.
Alteration processes:	Alteration that has affected all rocks in the mine area are strong silicification, prograde garnet+diopside skarn that has been partially replaced by a retrograde assemblage of chlorite, quartz, calcite, and minor epidote.

References

MRDS	M231296
DEP	10310304
Reference	{Deposit:: Stewart, J. H., Mc Kee, E. H., and Stager, H. K., 1977, Geology and Mineral Deposits of Lander County, Nevada; NBMG Bull. 88}{Deposit:: Roberts, R. J. and Arnold, D. C., 1965, Ore Deposits of the Antler Peak Quadrangle, Humboldt and Lander Counties, Nevada: U.S.G.S. Prof. Paper 459-B.}{Deposit:: Schmidt, K. W., Wotruba, P. R., and Johnson, S. D., 1988, Gold-Copper Skarn and Related Mineralization at Copper Basin, Nevada, in Gold Deposits of North Central Nevada, Special Publication #8, the Geological Society of Nevada, Reno.}{Deposit:: Battle Mountain Gold Company, 1988, Annual Report for 1987.}{Deposit:: NBMG Mining District File 147, numerous press clippings.}{Deposit:: Bulk-Mineable Precious Metal Deposits and Prospects in Nevada, NBMG Map 91.}{Deposit:: NBMG, 1988, The Nevada Mineral Industry - 1987, NBMG Special Publication MI-1986-MI-1993.}{Deposit:: Buffa, R. and Schafer, R., eds., 1988, Fall Field Trip Guidebook, the Geological Society of Nevada, Reno, p. 271-276.}{Deposit:: USGS PP 459B}{Deposit:: Doebrich and Theodore, 1996}{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.}{Deposit:: Geological Society of Nevada, 1999, Geology and Gold Mineralization of the Buffalo Valley Area, Northwestern Battle Mountain Trend; GSN Special Publication No. 31, 1999 Fall field trip Guidebook.}{Deposit:: Wendt, Clancy, 2004, Technical Report on the? ICBM/COPPER BASIN Property, Lander and Humboldt Counties, Nevada, Staccato Gold website, : http://www.staccatogold.com/i/pdf/icbm-43-101.pdf}
Reporter	LaPointe, D.D., Schruben, Paul G.