Commodities
PrimarySilver, Lead, Gold
Commodity typeM
Deposit
Deposit typeVein
Deposit sizeS
Ore controlPlug And Radiating Dikes From Precaldera Volcano
Materials
Ore mineralsPyrite
GangueLimonite
Geology
Host rockMonzonite,Rhyodacite,Andesite
Associated rockMonzonite,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)
Economic & production
Development statusPast Producer
Last production1931
Identification
Deposit ID10014691
MRDS IDD011576
Alternate namesPatented Claim: Silver Jack, MS 20073, Unpatented Claims: Silver Jack Nos. 2-10, 12-14, Silver Jack Extension
RegionNA
Data scoreB
Coordinates38.10167, -107.47146
References
LIPMAN, 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.COLORADO DIV. MINES INF. REPTS.BLM MINERAL SURVEY MS 20073STEVEN, T.A., AND OTHERS, 1977, MINERAL RESOURCES OF STUDY AREAS CONTIGUOUS TO THE UNCOMPAHGRE PRIMITIVE AREA, SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS BULL. 1391-E, P. 36-37, 85.