Mine detail: Daisy Gold Mine

Previously called 'Sunday Night Zone (Joshua)West ZoneCrowell MineDaisy Fluorspar MineBeatty Fluorspar MineLige Harris-Enif AreaYellow SparBullmoose North PitBullmoose South PitGold AceGood Hope PitMother LodeRewardSecret Pass ZoneSouth Zone'

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Location

Lat / long:

36.87664, -116.69728

Resource(B)

Primary:	Gold, Silver, Fluorine-Fluorite
Tertiary:	Uranium, Mercury, Clay, Arsenic, Copper, Molybdenum, Thallium
Ore:	Gold, Fluorite, Cinnabar, Clay, Calcite, Dolomite, Quartz, Montmorillonite, Sericite, Kaolinite
Gangue:	Silica
Orebody form:	Gold is disseminated in tabular to irregular bodies. Fluorite occurs as lenticular irregular masses, irregular veins, small masses, disseminated grains, pipe-like.
Discovery year:	1918

Production

Operation type:	Surface-Underground
Deposit type:	sediment-hosted gold; volcanic-hosted veins; hydrothermal replacement
Production size:	Large
Development status:	Producer
Production years:	gold, 1997- 2001 fluorspar, 1916-1988
First production started:	1919
Last production ended:	2001

Geology

Host rock:	Halfpint member of the Nopah Formation, Carrara Formation, Bonanza King Formation
Host type:	Limestone,Siltstone,Dolomite,Welded Tuff,Rhyolite
Associated type:	Tuff,Rhyolite,Basalt,Latite
Structure:	Significant local structures are the Bullfrog Hills Caldera, Fluorspar Canyon detachment fault, northeast-trending, steep dipping, right lateral tear faults and gently northwest dipping thrust faults. The principal structural ore control for all three gold mineralized zones is normal faulting. The highest grade ore zones are associated with intersections of high-angle and low-angle faults. A low-angle fault forms the footwall of the gold mineralization in the favorble host rocks at the West Zone. In the South Zone, disseminated gold mineralization occurs in favorable host rocks in the footwall of a low-angle fault., A low-angle structure called the Fluorspar Canyon Detachment separates mineralized volcanic rocks in the hanging wall from unmineralized Paleozoic sedimentary rocks in the footwall of the fault and is thought to be part of a large-scale fault bounding the base of a regional allochthonous terrane.
Tectonic:	back-arc extensional cratonic basin
Alteration processes:	The highest gold values in the West Zone are associated with intense silicification and fluorite occurrence. Gold mineralization in the Halfpint member is accompanied by anomalous concentrations of arsenic, antimony, mercury, and thallium. Alteration in the Carrara Formation occurs as subtle decalcification, accompanied by anomalously high arsenic and silver, copper, molybdenum and thallium values correlating with gold. In the Secret Pass Zone, disseminated gold mineralization occurs in strongly propylitized, argillized, and silicified Miocene rhyolitic ash-flow tuffs.

References

MRDS	W006927
DEP	10310491
Reference	{Deposit:: Greybeck, J. D., and Wallace, A. B., 1991, Gold mineralization at Fluorspar Canyon near Beatty, Nye County, Nevada, in Raines, G. L., et al, eds., Geology and Ore Deposits of the Great Basin, the Geological Society of Nevada, Reno, p. 935-946.}{Deposit:: Ahern, R. and Corn, R. M., 1981, Mineralization Related to the Volcanic Center at Beatty, Nevada: Arizona Geological Society Digest XIV, p. 283-286.}{Deposit:: Mapa, M.R., 1990, Geology and mineralization of the Mother Lode Mine, Nye County, Nevada, in Schafer, R., et al, eds., The Geology and Ore Deposits of the Great Basin, Field Trip Guidebook #9, the Geological Society of Nevada, Reno.}{Deposit:: NBMG, 1991, The Nevada Mineral Industry 1990, NBMG Special Publication MI-1990, p. 24.}{Deposit:: NBMG, 1994, MI-1993.}{Deposit:: Cornwall, H. R. and Kleinhampl, F. J., 1964, Geology of Bullfrog Quadrangle and Ore Deposits related to Bullfrog Hills Caldera, Nye County, Nevada and Inyo County, California: USGS Prof. Paper 454-J.}{Deposit:: Cornwall, H. R. and Kleinhampl, F. J., 1961, Geology of Bare Mountain Quadrangle, Nevada: USGS Geologic Quadrangle Map GQ-157}{Deposit:: Geehan, R. W., 1946, Exploration of the Crowell Fluorspar Mine, Nye County, Nevada: U.S. Bur. Mines Rept Inv. 3954, 9 p.}{Deposit:: Garside, L.J., 1973, Radioactive Mineral Occurrences in Nevada: NBMG, Bull. 81, p. 92.}{Deposit:: Papke, K.G., 1979, Fluorspar in Nevada: NBMG Bull. 93, p.40-43.}{Deposit:: Cornwall, H.R., 1972, Geology and Mineral Deposits of Southern Nye Co.: NBMG Bull, 77, p. 35.}{Deposit:: Kral, V.E., 1951, Mineral Resources of Nye Co.: NBMG Bull. 50, p. 61-62.}{Deposit:: Thurston, W.R., et. al., 1949, Daisy Fluorspar Deposit: USGS Strat. Min. Inv. Prelim. Rept. 3-209.}{Deposit:: Quade/Smith, 1982, Field Examination, NBMG, 4/21/82}{Deposit:: Papke, K.G., 1983, Directory of Nev. Mine Operations Active in 1982; NBMG Report}{Deposit:: Avon, 1974, Daisy Mine Report, NBMG File 228, Item 1}{Deposit:: Union Pacific RR. Co., 1952, Fluorspar Resources of CA., NV, OR, ID., CO.}{Deposit:: USGS, 1949, Strategic Minerals Investigations Preliminary Rept 3-209}{Deposit:: Smith, A.M., 1931, Inspection Trip Notes, NBMG, File 228, Item 8}{Deposit:: Lincoln, F.C., 1923, Mining Dist and Mineral Resources of Nev; Nev. Newsletter Pub. Co., Reno, NV.}{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:: Glamis Gold Ltd., company press release, 2/28/2000.}{Deposit:: Yahoo Mining/Metals News, 11/8/1999.}{Deposit:: Glamis Gold website, 1998.}
Reporter	LaPointe, D.D. , Schruben, Paul G.