Mine detail: Emma Mine

Previously called 'Patented Claims: Great Bear, MS 12930Modern Mines Mil SiteLion, MS 12930Sirius, MS 12931Little Emma, MS 12951aOrion, MS 12953aBrooklyn, MS 18498May Flower, MS 18499Unpatented Claims: EmmaretteBarbaraPatriciaCynthiaQueenmaryModern GoldNormandicModern Gold Mill SiteEmmarette Mill Site'

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Location

Lat / long:

37.76723, -108.09843

Resource(M)

Primary:	Gold, Silver, Lead
Secondary:	Coal
Tertiary:	Copper, Zinc
Ore:	Argentite, Chalcopyrite, Coal, Galena, Polybasite, Pyrargyrite, Pyrite, Sphalerite
Gangue:	Barite, Epsomite, Gypsum, Melanterite, Quartz
Discovery year:	1880

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1885
Last production ended:	1980

Geology

Host rock:	Dolores Formation;Dakota Sandstone
Host type:	Shale,Sandstone
Associated rock:	Microgabbro;Lamprophyre
Associated type:	Gabbro,Lamprophyre
Structure:	San Juan Uplift, Paradox Basin, Rico Dome, Dunton Syncline, Emma Fault
Tectonic:	Central Cordillera (Southern Rocky Mtns)

References

MRDS	D010905
DEP	10014230
Reference	{Deposit:: BUSH, A.L., AND BROMFIELD, C.S., 1966, GEOLOGIC MAP OF THE DOLORES PEAK QUADRANGLE, DOLORES AND SAN MIGUEL COUNTIES, COLORADO: USGS MAP GQ-536.}{Deposit:: BASTIN, E.S., 1922, SILVER ENRICHMENT IN THE SAN JUAN MOUNTAINS, COLORADO: USGS BULL. 735-D, P. 116-120.}{Deposit:: COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.}{Deposit:: BLM MINERAL SURVEYS MS 12930, 12931, 12951A, 12953A, 18498, 18499}{Deposit:: KRANTZ, P.R., AND FREEMAN, W.H., 1923, A STUDY OF THE ORES OF DUNTON, DOLORES COUNTY, COLORADO: COLORADO SCHOOL OF MINES THESIS T-503.}{Production:: BASTIN, 1922, P. 120 (1913 FIGURES); COLORADO DIV. MINES ANNUAL OPERATOR REPTS. (1920-1980 FIGURES)}
Reporter	Schwochow, Stephen D.