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Newman Tunnel

Past Producer in Pitkin county in Colorado, United States with commodities Silver, Lead, Zinc
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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. Host and associated rocks
  8. Nearby scientific data
  9. Geologic structures
  10. Controls for ore emplacement
  11. Economic information about the deposit and operations
  12. Mining district
  13. Land status
  14. Ownership information
  15. Production statistics
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10013383
MRDS ID D009644
Record type Site
Current site name Newman Tunnel
Alternate or previous names Claims: La Salle, Denver, Harrisburg, Bijou, Keystone, St. Paul
Related records 10264696

Geographic coordinates

Geographic coordinates: -106.8384, 39.17693 (WGS84)
Elevation 2487
Relative position 1.3 MILES S 55 W FROM ASPEN

Site location context

Political divisions (FIPS codes)

Pitkin(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Aspen(quadrangle 1:24,000 scale)

Leadville(quadrangle 1:100,000 scale)

Leadville(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Roaring Fork(hydrologic unit)

Colorado Headwaters(hydrologic accounting unit)

Colorado Headwaters(hydrologic subregion)

Upper Colorado(hydrologic region)

Federal lands

White River 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 Pitkin

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 010S 085W 13 SW Colorado

Comments on the location information

  • IN UPPER ASPEN MTN AREA, NEAR MOUTH OF KENO GULCH AT WEST BASE OF WEST ASPEN MTN. ELEV AND LAT-LONG FROM BRYANT (1972) ; INFO FROM LAND.ST :(1980)

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Critical Primary

Analytical data

Result ORE GRADES RAN 6 TO 23.6 OZ/TON AG AND 4 TO 7.5% PB

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Aplite Porphyry
    Rock description Aplite Porphyry
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Mississippian
    Stratigraphic age (youngest) Paleocene
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite
    Rock unit name Leadville Limestone;Belden Formation
    Rock description Leadville Limestone;Belden Formation

Nearby scientific data

(1) -106.8384, 39.17693
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Sawatch Uplift, Central Colorado Trough, Piceance Basin, White River Uplift, Elk Uplift
Type of structure Local
Structure description Silver Fault, Contact Fault, Aspen Mountain Syncline, Tourtellotte Park Uplift

Controls for ore emplacement

  • Bedding Plane Faults; Paleokarst

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1881
Discoverer Charles Markell And Others (Claimants)
Year of last production 1926

Mining district

District name Aspen (Roaring Fork) District

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Fred Leaver And Associates
    Home office Aspen, Co.
    First year 1926

Production statistics

  • Year 1917
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^6 Oz/Ton Ag, 4% Pb (Dump Ore)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major dump ore Lead Lead 4wt-pct
    Major Ore Silver Silver 169g/mt
  • Year 1919
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^(Crude Ore) 23.6 Oz/Ton Ag, 7.5% Pb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Silver Silver 666g/mt
    Major Ore Lead Lead 8wt-pct
  • Year 1921
    Accuracy Accurate
    Description Ap_Grade: ^20 Oz/Ton Ag, 6% Pb, 6% Fe, 1% S
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Lead Lead 6wt-pct
    Major Ore Silver Silver 565g/mt
    Ore Sulfur Sulfur 1wt-pct
    Ore Iron Iron 6wt-pct
  • Year 1922
    Accuracy Accurate
    Description Ap_Grade: ^12 Oz/Ton Ag, 7% Pb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Silver Silver 339g/mt
    Major Ore Lead Lead 7wt-pct
  • Year 1923
    Accuracy Accurate
    Description Ap_Grade: ^12 Oz/Ton Ag, 5% Pb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Lead Lead 5wt-pct
    Major Ore Silver Silver 339g/mt
  • Year 1924
    Accuracy Accurate
    Description Ap_Grade: ^15 Oz/Ton Ag, 5% Pb, 8% Fe, 1% S
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Iron Iron 8wt-pct
    Major Ore Lead Lead 5wt-pct
    Major Ore Silver Silver 424g/mt
    Ore Sulfur Sulfur 1wt-pct
  • Year 1926
    Accuracy Accurate
    Description Ap_Grade: ^10 Oz/Ton Ag, 6% Pb, 4% Fe
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Iron Iron 4wt-pct
    Major Ore Lead Lead 6wt-pct
    Major Ore Silver Silver 282g/mt

Comments on the production information

  • PARTIAL PRODUCTION RECORD. FIGURES FOR 1920 AND 1925 NOT REPORTED. TONNAGES FOR 1921-26 REPORTED AS CRUDE ORE

Comments on the workings information

  • ONE TUNNEL DRIVEN GENERALLY EASTWARD APPROX ONE MILE. FIRST INCLINE IS 900 FT HIGH AT 62 DEG; SECOND INCLINE IS 300 FT HIGH AT 60 DEG; THIRD INCLINE IS 1150 FT HIGH AT 53 DEG.

Reference information

Bibliographic references

  • Deposit

    SPURR, J. E., 1898, GEOLOGY OF THE ASPEN DISTRICT, COLORADO: USGS MON. 31

  • Deposit

    BRYANT, BRUCE, 1971, GEOLOGIC MAP OF THE ASPEN QUADRANGLE, PITKIN COUNTY, COLORADO: USGS MAP GQ-933.

  • Deposit

    BRYANT, BRUCE, 1972, MAP SHOWING MINES, PROSPECTS, AND AREAS OF SIGNIFICANT SILVER, LEAD, AND ZINC PRODUCTION IN THE ASPEN QUADRANGLE, PITKIN COUNTY, COLORADO: USGS MAP I-785-D

  • Deposit

    BLM MINERAL SURVEYS MS 1601, 1602, 2047, 4279

  • Production

    COLO, DIV. MINES ANN. OPERATOR REPTS.

General comments

Subject category Comment text
Deposit EXACT HEADING AND LENGTH OF TUNNEL UNKNOWN, BUT IF DRIVEN SE, MINE PROBABLY DEVELOPED OXIDIZED ORE NEAR AXIS OF ASPEN MTN SYNCLINE PROBABLY ON CONTACT AND SILVER FAULTS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1982 Schwochow, Stephen D. Colorado Geological Survey

Beyond USGS

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

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.