Commodities
PrimarySilver, Lead, Gold
Commodity typeM
Deposit
Deposit sizeS
Ore controlPlugs And Radiating Dikes From Precaldera Volcano
Materials
Ore mineralsPyrite
GangueLimonite
Geology
Host rockMonzonite,Rhyodacite,Andesite
Associated rockMonzonite,Rhyolite,Rhyodacite,Quartz Latite,Andesite · Early Intermediate-Composition Lavas And Related Rocks--Intrusive Rocks (Monzonite And Monzonite Porphyry);Early Intermediate-Composition Lavas And Related Rocks--Intrusive Rocks (Andesite And Rhyodacite Porphyries);Early Intermediate-Composition Lavas And Related Rocks--Lava Flows;Early Intermediate-Composition Lavas And Related Rocks--Cone Breccias
StructureSan Juan Volcanic Field, San Juan Depression, San Juan-Uncompahgre Calderas, Lake City Caldera, Cimarron Volcano
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationPropylitization, Argillization, Silicification, Pyritization
Economic & production
Development statusPast Producer
Last production1931
Identification
Deposit ID10014690
MRDS IDD011575
Alternate namesSilver Jack, MS 20073, Roscoe Conkling, MS 1697, Good Enough Extension, MS 13896, Government Stamp Lode, MS 2353, Pay Day Placer, MS 9779, Phil Sheridan, MS 9780, Good Enough, MS 13896, Patented Claims, Golden Eagle, MS 9781
RegionNA
Data scoreB
Coordinates38.11472, -107.47953
References
LIPMANM P.W., 1976, GEOLOGIC MAP OF THE LAKE CITY CALDERA AREA, WESTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-962.LIPMAN, P.W., AND OTHERS, 1973, REVISED VOLCANIC HISTORY OF THE SAN JUAN, UNCOMPAHGRE, SILVERTON, AND LAKE CITY CALDERAS IN THE WESTERN SAN JUAN MOUNTAINS, COLORADO: USGS JOUR. RESEARCH, V. 1, NO. 6, P. 627-642.STEVEN, T.A., AND LIPMAN, P.W., 1976, CALDERAS OF THE SAN JUAN VOLCANIC FIELD, SOUTHWESTERN COLORADO: USGS PROF. PAPER 958, P. 10-16.COLORADO DIV. MINES INF. REPTS.BLM MINERAL SURVEYS MS 1697, 2353, 9779, 9780, 9781, 13896, 20073LIPMAN, P.W., AND OTHERS, 1976, MULTIPLE AGES MID-TERTIARY MINERALIZATION AND ALTERATION IN THE WESTERN SAN JUAN MOUNTAINS, COLORADO: ECON. GEOLOGY, V. 71, NO. 3, P. 571-588.HON, KEN, AND MEHNERT, H.H., 1983, COMPILATION OF REVISED AGES OF VOLCANIC UNITS IN THE SAN JUAN MOUNTAINS, COLORADO--RECALCULATED K-AR AGE DETERMINATIONS USING IUGS CONSTANTS: USGS OPEN-FILE REPT. OFR-83-668.STEVEN, T.A., AND OTHERS, 1977, MINERAL RESOYRCES OF STIDY AREAS CONTIGUOUS TO THE UNCOMPAHGRE PRIMITIVE AREA, SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS BULL. 1391-E, P. 36-37, 85-86, PLS. 1, 3.