Moonlight Mine

Past Producer in Lewis and Clark county in Montana, United States with commodities Silver, Lead, Copper
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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10015851
MRDS ID DB02111
Record type Site
Current site name Moonlight Mine

Geographic coordinates

Geographic coordinates: -112.06394, 46.66907 (WGS84)
Location accuracy 250(meters)
Relative position EAST SIDE OF THE SCRATCHGRAVEL HILLS AT THE MOUTH OF A GULCH DECENDING EASTWARD FROM THE HIGHEST SUMMIT. NORTH SIDE OF GULCH

Site location context

Political divisions (FIPS codes)

Lewis and Clark(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Scratchgravel Hills(quadrangle 1:24,000 scale)

Elliston(quadrangle 1:100,000 scale)

Butte(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Missouri(hydrologic unit)

Upper Missouri(hydrologic accounting unit)

Missouri-Marias(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management MT)

Bureau of Land Management MT BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Montana Lewis and Clark

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 011N 004W 35 Montana

Comments on the location information

  • ABOUT 8 KM NW OF HELENA.

Commodities

Commodity Importance
Silver Primary
Lead Secondary
Copper Tertiary

Materials information

Materials Type of material
Galena Ore
Lead Ore
Pyrite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Scratchgravel Quartz Monzonite Stock
    Rock description Scratchgravel Quartz Monzonite Stock
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite

Nearby scientific data

(1) Granitic rock

Economic information

Geologic structures

Type of structure Regional
Structure description Boulder Batholith
Type of structure Local
Structure description Fault Dipping 45e, Cuts South Vein Scratchgravel Quartz Monzonite Stock

Ore body information

  • General form IRREGULAR, PINCH AND SWELL
    Strike NORTH
    Dip 20W
    Width 3.05M

Controls for ore emplacement

  • Near Intrusive Contact Along Faults.

Economic information about the deposit and operations

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

Mining district

District name Scratchgravel Hills District

Ownership information

  • Type Owner
    Owner Otto Anderson

Comments on the production information

  • $10000 CHIEFLY IN AG

Workings at the site

  • Type of workings Underground
    Length 121.92M

Comments on the workings information

  • SHORT ADITS AND INCLINED SHAFTS

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit 2 VEINS, SMALLER SOUTH VEIN TRENDS WEST, DIPS 20 S AND IS 2.5 FT. WIDE IT IS CUT OFF BY A TRANSVERSE FAULT THAT DIPS 45 E. NORTH VEIN STRIKES NORTH AND DIPES 20 W, NEXT TO HAGING WALL IS 6-24 IN LAYER OF IRON OXIDES AND QUARTZ.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-80 Elliott, James E. U.S. Geological Survey
Updater 01-NOV-81 Wise, Kristine K. (Elliott, James E.) U.S. Geological Survey

Beyond USGS

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