Mine detail: Little Annie Placers

Location:	Rio Grande County, Colorado, United States, North America
Lat / long:	37.43141, -106.60282
dep_id:	10014039
mrds_id:	D010655
Commodity type:	metallic
Major mineral:	Gold
Operation type:	Unknown
Deposit type:	Placer
Production size:	Small ammount of material produced
Development status:	Past Producer
ore:	Gold
conc_proc:	Gravity Concentration And Streamflow Processes
Reporter:	Schwochow, Stephen D.
hrock_unit:	Alluvium;Colluvium
hrock_type:	Sand and Gravel
arock_unit:	Quartz Latite Of South Mountain
arock_type:	Quartz Latite
Structure:	San Juan Volcanic Field, Platoro Caldera, Summitville Caldera, Summitville Fault, South Mountain Dome
tectonic:	Central Cordillera (Southern Rocky Mtns)
Year first produced:	1875
disc_yr:	1870
discr:	James L. Wightman, E. Baker, J. Cary French, Sylvester Reese, William Boran
References:	Deposit:: PARKER, B.H., JR., 1974, GOLD PLACERS OF COLORADO: COLORADO SCHOOL OF MINES QUART., V. 69, NO. 4, P. 208-210. Deposit:: PATTON, H.B., 1917, GEOLOGY AND ORE DEPOSITS OF THE PLATORO-SUMMITVILLE MINING DISTRICT, COLORADO: CGS BULL. 13. Deposit:: STEVEN, T.A., AND RATTE, J.C., 1960, GEOLOGY AND ORE DEPOSITS OF THE SUMMITVILLE DISTRICT, SAN JUAN MOUNTAINS, COLORADO: USGS PROF. PAPER 343. Deposit:: LIPMAN, P.W., 1974, GEOLOGIC MAP OF THE PLATORO CALDERA AREA, SOUTHEASTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-828. Deposit:: BLM MINERAL SURVEYS MS 74, 75