Mine detail: St. Jacob Mine

Previously called 'St. Jacob GroupPatented Claims: Hamilton, MS 2425Griggs, MS 2426St. Johns, MS 2427St. Jacobs, MS 2428'

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Location

Lat / long:

37.84473, -107.36396

Resource(M)

Primary:	Silver, Gold, Copper, Lead
Secondary:	Zinc
Ore:	Chalcopyrite, Enargite, Marcasite, Pyrite, Sphalerite
Gangue:	Barite, Quartz
Discovery year:	1886

Production

Operation type:	Unknown
Deposit type:	Vein
Production size:	Small
Development status:	Producer
First production started:	1895
Last production ended:	1940

Geology

Host type:	Rhyodacite,Quartz Latite,Andesite
Associated rock:	Early Intermediate-Composition Lavas And Related Rocks--Lava Flows
Associated type:	Rhyodacite,Quartz Latite,Andesite
Structure:	San Juan Volcanic Field, San Juan Depression, San Juan-Uncompahgre Calderas, Lake City Caldera, Carson Volcano
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Silicification

References

MRDS	D011582
DEP	10014695
Reference	USBM 1940 MINERAL YEARBOOK
Reporter	Schwochow, Stephen D.