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Little Mattie-Newton Group

Past Producer in Clear Creek county in Colorado, United States with commodities Gold, Silver, Lead, Zinc, Copper
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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. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. Reporter information

Geologic information

Identification information

Deposit ID 10108392
MRDS ID DC05291
Record type Site
Current site name Little Mattie-Newton Group
Alternate or previous names General Thomas, Decator, Silver Glance, Little Mattie, Great Republican, Newton, Wild Rose
Related records 10287375

Geographic coordinates

Point of reference Geographic coordinates: Elevation UTM Precision Relative position Point location
-105.55726, 39.73305 (WGS84)
(click for info)
-105.56253, 39.72943 (WGS84) 10

Site location context

Political divisions (FIPS codes)

Clear Creek(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Idaho Springs(quadrangle 1:24,000 scale)

Denver West(quadrangle 1:100,000 scale)

Denver(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Clear(hydrologic unit)

South Platte(hydrologic accounting unit)

South Platte(hydrologic subregion)

Missouri(hydrologic region)

Geographic areas

Country State County
United States Colorado Clear Creek

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 04S 73W 04 Colorado

Comments on the location information

  • Little Mattie shaft is in SE/4 sec. 4, T 4 S, R 73 W, about 2-1/2 miles WSW of Idaho Springs.

Commodities

Commodity Importance
Gold Primary
Silver Primary
Lead Primary
Zinc Critical Primary
Copper Secondary

Comments on the commodity information

  • Gold values predominate other metals.
  • Gangue contains carbonate minerals.

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Gold Ore
Sphalerite Ore
Tennantite Ore
Pyrite 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 Host
    Rock type Metamorphic Rock > Gneiss
    Rock unit name Idaho Springs Formation
    Stratigraphic age (youngest) Proterozoic
  • Host or associated Host
    Rock type Plutonic Rock > Pegmatite
    Stratigraphic age (youngest) Proterozoic
  • Host or associated Host
    Rock type Plutonic Rock > Porphyry
    Stratigraphic age (youngest) Tertiary

Nearby scientific data

(1) -105.55726, 39.73305
ListMap
(2) -105.56253, 39.72943
ListMap

Economic information

Comments on the geologic information

  • The Little Mattie sulfide vein occupies a strong NE-trending fissure along bostonite porphyry dikes.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Chicago Creek area

Comments on the production information

  • Gold and silver was produced from 1887 to 1892. From 1902 to 1951, gold production was 47,141.43 oz, silver was 361,996 oz, copper was 13,924 lb, lead was 264,725 lb, and zinc was 288,906 lb, from 188,652 tons of ore.
  • Ore was produced from 17 levels over a range of 1700 feet elevation.

Comments on the reserve resource information

  • Report dated 1981, potentially 660,000 tons of ore at 0.31 opt Au and 2.4 opt Ag.

Comments on the workings information

  • The workings of the Little Mattie-Newton group include several shafts and 5 miles of drifts on 17 levels.

Reference information

Bibliographic references

  • Deposit

    Spurr, J. E., Garrey, G. H., and Ball, S. H., 1908, Economic geology of the Georgetown quadrangle, Colorado: U.S. Geological Survey Professional Paper 63, 422 p.

  • Deposit

    BLM CONNECTING SHEETS

  • Deposit

    USGS BULL. 1208, 1966

  • Deposit

    USGS OPEN-FILE REPT. 835, 1966

  • Deposit

    Harrison, J. E., and Wells, J. D., 1959, Geology and ore deposits of the Chicago Creek area, Clear Creek County, Colorado: U.S. Geological Survey Professional Paper 319, 92 p.

  • Deposit

    Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1973 Conservation Division Files U.S. Geological Survey
Updater 29-DEC-2005 Beach, Richard A. Colorado Geological Survey
Updater 18-JUL-0007 Melton, Greg U.S. 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.