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Little Nona Mine

Past Producer in La Plata county in Colorado, United States with commodities Gold, Silver, Copper, Lead, Manganese
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10014175
MRDS ID D010834
Record type Site
Current site name Little Nona Mine
Alternate or previous names Unpatented Claim: Little Nona
Related records 10214981

Geographic coordinates

Geographic coordinates: -108.08065, 37.35612 (WGS84)
Elevation 2761
Relative position 12.25 MILES N 66 W FROM DURANGO

Site location context

Political divisions (FIPS codes)

La Plata(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Hesperus(quadrangle 1:24,000 scale)

Cortez(quadrangle 1:100,000 scale)

Cortez(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle San Juan(hydrologic unit)

Upper San Juan(hydrologic accounting unit)

San Juan(hydrologic subregion)

Upper Colorado(hydrologic region)

Federal lands

San Juan National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Colorado La Plata

Public Land Survey System information

Meridian Township Range Section Fraction State
New Mexico 036N 011W 21 SW Colorado

Comments on the location information

  • (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

Commodities

Commodity Importance
Gold Primary
Silver Primary
Copper Secondary
Lead Secondary
Manganese Critical Tertiary

Materials information

Materials Type of material
Cerargyrite Ore
Barite Gangue
Quartz Gangue

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Porphyritic Rocks--Diorite-Monzonite Porphyry
    Rock description Porphyritic Rocks--Diorite-Monzonite Porphyry
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Paleocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Entrada Sandstone;Pony Express Limestone Member Of Wanakah Formation
    Rock description Entrada Sandstone;Pony Express Limestone Member Of Wanakah Formation

Nearby scientific data

(1) -108.08065, 37.35612
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description San Juan Uplift, Four Corners Platform
Type of structure Local
Structure description La Plata Dome

Ore body information

  • Thickness 1.37M

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name California (La Plata) District

Land status

Ownership category National Forest
Area name San Juan N. F.

Comments on the production information

  • APPARENT COMPLETE PRODUCTION RECORD, ALTHOUGH FIGURES FOR 1931 MAY BE IN ERROR.

Comments on the workings information

  • 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.

Reference information

Bibliographic references

  • 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

  • Production

    ECKEL AND OTHERS, 1949, P.138 (AS COMPILED FROM USGS AND USBM RECORDS)

General comments

Subject category Comment text
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.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1983 Schwochow, Stephen D. Colorado Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

Maps centered on this site

Authoritative Colorado resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.