Mine detail: Keystone Group 1880

Previously called 'Claims Patented In 1902KeystoneGreat South West'

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Location: Sierra County, New Mexico, United States, North America
Lat / long: 33.46566, -107.74339
dep_id: 10011911
mrds_id: D007102
Commodity type: metallic
Major mineral: Silver, Copper, Gold
Operation type: Unknown
Production size: Small ammount of material produced
Development status: Producer
ore: Argentite, Chalcopyrite, Chlorargyrite, Gold, Malachite, Silver
work_type: Surface/Underground
conc_proc: Oxidation Enrichment
ore_ctrl: Mineralized Solutions Rose Along Faults And Localized As Fissure Fillings.
Reporter: Menzie, David
hrock_type: Andesite
arock_type: Andesite
Structure: Deposit Occurs Along A Major North-Striking Fault Zone Which Separates The Black Range To The West From A Well-Defined Graben Valley To The East.
Year first produced: 1880
yr_lst_prd: 1948
disc_yr: 1880
References:
  • Deposit:: LINDGREN, W., GRATON, L.C., AND GORDON, C.H., 1910 USGS PP 68, P. 260-263
  • Deposit:: HARLEY, G.T., 1934 NMBMMR BULL 10, P. 72-80
  • Deposit:: KELLEY, V.C., 1955 NMGS SIXTH FIELD CONFERENCE, GEOLOGIC MAP OF SIERRA COUNTY REGION, N.M.
  • Deposit:: NMBMMR GENERAL FILE DATA
  • Production:: G.T. HARLEY, 1934 P. 78
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