Mine detail: Incas Mine

Previously called 'Incas No. 1, MS 18511Oriental, MS 18511Incas No. 2, MS 18513Incas No. 3, MS 18513Van Emmett PropertyPatented Claims: Incas, MS 17117Northern Slope, MS 18513Unexpected No. 1, MS 18513Unexpected No. 2, MS 18513Unexpected No. 3, MS 18513Great Divide, MS 18513Great Divide No. 2, MS 18513Great Divide No. 3, MS 18513Northern Knight, MS 18513Moonlight, MS 18513Gold Coin, MS 18740Unexpected, MS 17118'

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Location

Lat / long: 37.3664, -108.06009

Resource(M)

Primary: Gold, Silver
Secondary: Copper, Lead
Tertiary: Zinc, Tellurium
Ore: Galena, Gold, Pyrite, Sphalerite
Gangue: Ankerite, Calcite, Quartz
Discovery year: 1904

Production

Operation type: Unknown
Production size: Small
Development status: Past Producer
First production started: 1909
Last production ended: 1922

Geology

Host rock:Pony Express Limestone Member Of Wanakah Formation;Entrada Sandstone
Host type:Sandstone,Limestone
Associated rock:Porphyritic Rocks--Diorite-Monzonite Porphyry
Associated type:Diorite
Structure:San Juan Uplift, Four Corners Platform, La Plata Dome
Tectonic:Central Cordillera (Southern Rocky Mtns)
Alteration processes:Sericitization, Kaolinitization

References

MRDSD010826
DEP10087915
Reference{Deposit:: ECKEL, E.B., AND OTHERS, 1949, GEOLOGY AND ORE DEPOSITS OF THE LA PLATA DISTRICT, COLORADO: USGS PROF. PAPER 219, P. 73-76, 125-129.}{Deposit:: COLORADO DIV. MINES INF. REPTS.}{Deposit:: BLM MINERAL SURVEYS MS 17117, 17118, 18511, 18513, 18740}{Production:: ECKEL AND OTHERS, 1949, P. 126 (AS COMPILED FROM USGS AND USBM RECORDS)}
ReporterSchwochow, Stephen D.