Mine detail: Crater District

Previously called 'Claims: Shackman Mill Site, MS 9735Robert Burns, MS 9932East Boston, MS 10261aShackman, MS 10261aGoodie Queen, MS 10261aWest Field, MS 10261aNantucket, MS 10261aTopeka, MS 10261aElwood Mill Site, MS 10261bChicago Placer, MS 14147Emma May, MS 14164Riverside No. 1, MS 20517June Bug Nos. 1-2, MS 20517'

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Location

Lat / long:

37.38891, -106.69505

Resource(M)

Primary:	Silver, Lead, Zinc
Secondary:	Gold, Copper, Molybdenum
Tertiary:	Cadmium, Bismuth
Ore:	Chalcopyrite, Molybdenite, Pyrite, Pyrrhotite, Sphalerite
Gangue:	Barite, Calcite, Hematite, Limonite, Magnetite, Quartz
Discovery year:	1895

Production

Operation type:	Unknown
Production size:	None
Development status:	Occurrence

Geology

Host rock:	Conejos Formation--Volcaniclastic Facies;Conejos Formation--Vent Facies
Host type:	Monzonite,Conglomerate,Volcanic Rock (Aphanitic),Volcanic Breccia (Agglomerate),Rhyodacite,Andesite
Associated rock:	Intrusive Rocks--Monzonite;Intrusive Rocks--Quartz Latite, Andesite, And Rhyodacite Porphyries
Associated type:	Monzonite,Rhyodacite,Quartz Latite,Andesite
Structure:	San Juan Volcanic Field, Platoro Caldera, Elwood Creek Fault Zone, Crater Creek Stock, Quartz Creek Anticline
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Zoned Alteration Observed Includes 1) Outer Chloritic Zone Of Hydrothermal Alteration With Chlorites, Carbonates, Celadonite, Montmorillonite Clays, Silica Minerals, And Zeolites Enveloping 2) Propylitic Zone Of Albite, Calcite, Chlorite, And Epidote (Derived From Plagioclase And Ferromagnesian Minerals), Enveloping 3) Silicic Zone Of Quartz Veining And Replacement; 4) Phyllic Zone Of Pyritic Quartz-Sericite Rock. Inner Potassic And Pyrogenic Zones, If Present, Not Exposed.

References

MRDS	D010620
DEP	10094659
Reference	{Deposit:: LINDQUIST, A.E., 1977, METALLIC AND COAL RESOURCES, IN MINERAL RESOURCES OF THE CHAMA-SOUTHERN SAN JUAN MOUNTAINS WILDERNESS STUDY AREA, MINERAL, RIO GRANDE, ARCHULETA, AND CONEJOS COUNTIES, COLORADO: USGS OPEN-FILE REPT. 77-309.}{Deposit:: LIPMAN, P.W., 1974, GEOLOGIC MAP OF THE PLATORO CALDERA AREA, SOUTHEASTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-828.}{Deposit:: COLORADO DIV. MINES INF. REPTS. (LADY BUG MINE)}{Deposit:: BLM MINERAL SURVEYS MS 9735, 9932, 10261A&B, 14164, 21517}{Deposit:: LARSEN, E.S., JR., AND CROSS, WHITMAN, 1956, THE GRANODIORITES IN THE CENTRAL PART OF THE SUMMITVILLE QUADRANGLE, IN GEOLOGY AND PETROLOGY OF THE SAN JUAN REGION, SOUTHWESTERN COLORADO: USGS PROF. PAPER 258, P. 106-108.}{Deposit:: LIPMAN, P.W., 1975, EVOLUTION OF THE PLATORO CALDERA COMPLEX AND RELATED VOLCANIC ROCKS, SOUTHESATERN SAN JUAN MOUNTAINS, COLORADO: USGS PROF. PAPER 852.}
Reporter	Schwochow, Stephen D.