Mine detail: Last Chance Mine

Previously called 'Peifer QuarryUnpatented Claim: Peifer'

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Location: Gunnison County, Colorado, United States, North America
Lat / long: 38.44556, -107.38731
dep_id: 10014560
mrds_id: D011385
Commodity type: nonmetallic
Major mineral: Feldspar
Minor mineral: Mica
Operation type: Unknown
Production size: Small ammount of material produced
Development status: Past Producer
ore: Microcline, Muscovite
gangue: Biotite, Garnet
orebody_fm: TABULAR
work_type: Surface
Reporter: Schwochow, Stephen D.
hrock_unit: Migmatitic Gneiss
hrock_type: Gneiss
arock_unit: Pegmatite
arock_type: Pegmatite
Structure: Gunnison Uplift, Gunnison Uplift, Cimarron Fault
tectonic: Central Cordillera (Southern Rocky Mtns)
Year first produced: 1937
yr_lst_prd: 1957
disc_yr: 1936
discr: C. Peifer
References:
  • Deposit:: HANLEY, J.B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH 1942-1944: USGS PROF. PAPER 227, P. 80-81.
  • Deposit:: HANSEN, W.R., 1971, GEOLOGIC MAP OF THE BLACK CANYON OF THE GUNNISON RIVER AND VICINITY, WESTERN COLORADO: USGS MAP I-584.
  • Deposit:: ARGALL, G.O., JR., 1949, INDUSTRIAL MINERALS OF COLORADO: COLORADO SCHOOL OF MINES QUART., V. 44, NO. 2, P. 165.
  • Deposit:: COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.
  • Production:: COLORADO DIV. MINES ANNUAL OPERATOR REPTS. AND INF. REPTS.; ARGALL, 1949, P. 165
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