Nevada · Lyon County
Past Producer

Como Gold-Silver Property

Lyon County, Nevada, United States
GoldSilverCopperZincLead
⌖ Show on mapUSGS source ↗
Commodities
PrimaryGold, Silver
TertiaryCopper, Zinc, Lead
Commodity typeM
Deposit
Deposit typevein
Model150: Epithermal vein, Comstock
Deposit sizeM
Orebody formtabular
Ore controlShear zones
Materials
Ore mineralsGold, Pyrite, Chlorargyrite, Tetrahedrite
GangueQuartz, Pyrite, Sericite, Clay, Alunite
Geology
Host rockAndesite
StructureWalker Lane structural zone
AlterationVikre and McKee have identified five distinct hydrothermal mineral alteration assemblages affecting the host andesite in the Como District. Some of these are spatially restricted to vein selvages and others are more widespread. Mixed clay alteration assemblages indicate periodic changes from acid leaching to neutral conditions during gold-silver deposition. Alteration minerals proesent are: quartz, diaspore, sericite, kaolinite,dickite, halloysite, pyrophyllite, pyrite, montmorillonite, and alunite.
Economic & production
Development statusPast Producer
First production1860
Last production1930
Identification
Deposit ID10310425
Alternate namesBoyle, Pony Meadows, Hulley-Logan Mine Areas
RegionNA
Data scoreB
Coordinates39.15268, -119.47932
References
Cutler, H.C., "Como Nevada," Mining & Scientific Press, April 13, 1912, pp 539-540.Sirdevan, W.H, Report On Nevada Deep Mines Co, Unpublished Report, Item 6, File 181, NBMGCarlisle, H.C., Report on Como Mines Co, Unpublished Report, Item 3 File 181, NBMG.Stoddard, C, Carpenter, J.A., Mineral Resources of Storey and Lyon Counties, Nev (1950) NBMG Bull 49.Jerry Baughman, oral communication, 1999NBMG Bull 75Royal Standard Minerals Inc., website and press releases, 4/3/02, 2/1004NBMG MI-2002.VIkre, Peter and McKee, Edwin, 1994, Geology, alteration, and geochronology of the Como District, Lyon County, Nevada; Bulletin of the Society of Economic Geologists, vol.89, no.3, pp.639-646.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.Royal Standard Minerals website 2006, http://www.royalstandardminerals.com