The Little Nona Mine is a gold and silver mine located in La Plata county, Colorado at an elevation of 9,058 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 9,058 Feet (2,761 Meters)
Commodity: Gold, Silver
Lat, Long: 37.35611, -108.08000
Map: View on Google Maps
Satelite View
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Little Nona Mine MRDS details
Site Name
Primary: Little Nona Mine
Secondary: Unpatented Claim: Little Nona
Commodity
Primary: Gold
Primary: Silver
Secondary: Copper
Secondary: Lead
Tertiary: Manganese
Location
State: Colorado
County: La Plata
District: California (La Plata) District
Land Status
Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Administrative Organization: San Juan N. F.
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Colorado Plateaus
Physiographic Section: Navajo Section
Mineral Deposit Model
Model Name: Polymetallic veins
Orebody
Not available
Structure
Type: R
Description: San Juan Uplift, Four Corners Platform
Type: L
Description: La Plata Dome
Alterations
Not available
Rocks
Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Paleocene
Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Jurassic
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Paleocene
Analytical Data
Not available
Materials
Ore: Cerargyrite
Gangue: Barite
Gangue: Quartz
Comments
Comment (Workings): LOWER TUNNEL DRIVEN GENERALLY S 47 W FOR 140 FT WITH 40-FT BRANCH DRIFT DRIVEN MORE WESTERLY AT 30 FT FROM PORTAL AND 25-FT RAISE WITH 40-FT INCLINED DRIFT AT FACE OF MAIN TUNNEL. UPPER TUNNEL LOCATED 130 FT SW OF LOWER TUNNEL, DRIVEN GENERALLY S 47 W FOR 400 FT TO FACE, AT WHICH WINZE SUNK TO CONNECT WITH DRIFT IN JUMBO-MOROVORATZ TUNNEL.
Comment (Deposit): COUNTRY ROCKS CONSIST OF TRIASSIC-JURASSIC SEDIMENTARY ROCKS DIPPING SW AND INTRUDED BY DIORITE-MONZONITE PORPHYRY SILLS AND EAST-WEST-TRENDING DIKES. LOWER LEVEL WORKINGS CUT ENTRADA SANDSTONE ALONG 2- TO 4.5-FT-WIDE FRACTURE ZONE CONTAINING 0.25- TO 6-INCH-WIDE VEIN OF EARTHY MATERIAL, QUARTZ, BARITE, LIMONITE, AND RESIDUAL PYRITE. MUCH OF ORE PRODUCED REPORTEDLY CAME FROM PONY EXPRESS LIMESTONE CUT NEAR PORTAL OF UPPER ADIT.
Comment (Location): (LAND STATUS AND ADMINISTRATIVE AREA LOCATIONS CALCULATED USING GIS OVERLAY ANALYSIS FOR SAN JUAN N. F.). ON WEST SIDE OF LA PLATA RIVER SOUTH OF BAY CITY GULCH AND 700 FT NORTH OF MOROVORATZ TUNNEL, 3.15 MILES SSW OF LA PLATA TOWNSITE (UNSURVEYED SECTION). ; INFO FROM LAND.ST :1974
Comment (Production): APPARENT COMPLETE PRODUCTION RECORD, ALTHOUGH FIGURES FOR 1931 MAY BE IN ERROR.
References
Reference (Deposit): ECKEL, E.B., AND OTHERS, 1949, GEOLOGY AND ORE DEPOSITS OF THE LA PLATA DISTRICT, COLORADO: USGS PROF. PAPER 219, P. 69-70, 138, PL. 23
Reference (Production): ECKEL AND OTHERS, 1949, P.138 (AS COMPILED FROM USGS AND USBM RECORDS)
Colorado Mining Photos
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