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  3. Mineral Resource Data System (MRDS)

Twilight Mine

Past Producer in Deer Lodge county in Montana, United States with commodities Gold, Iron
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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. Alteration
  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. Ownership information
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10102002
MRDS ID DC10952
Record type Site
Current site name Twilight Mine

Geographic coordinates

Geographic coordinates: -113.24619, 46.21739 (WGS84)
Elevation 2195
Location accuracy 500(meters)
Relative position 0.62 METERS WEST OF CABLE TOWER LOOKOUT.

Site location context

Political divisions (FIPS codes)

Deer Lodge(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Silver Lake(quadrangle 1:24,000 scale)

Philipsburg(quadrangle 1:100,000 scale)

Butte(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Flint-Rock(hydrologic unit)

Pend Oreille(hydrologic accounting unit)

Kootenai-Pend Oreille-Spokane(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Beaverhead-Deerlodge 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 Montana Deer Lodge

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 005N 013W 04 Montana

Comments on the location information

  • WEST SLOPE OF CABLE MT, 3500 FT N 35 E OF SOUTHERN CROSS MINE. ; INFO FROM LAND.ST :(1971)

Commodities

Commodity Importance
Gold Primary
Iron Secondary

Materials information

Materials Type of material
Gold Ore
Hematite Ore
Iron Ore
Limonite Ore
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Pyritization, Oxidation

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Cable Stock
    Rock description Cable Stock
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cambrian
    Stratigraphic age (youngest) Late Cambrian
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Hasmark Formation
    Rock description Hasmark Formation

Nearby scientific data

(1) -113.24619, 46.21739
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Philipsburg Batholith
Type of structure Local
Structure description Cable Stock

Ore body information

  • General form IRREGULAR

Comments on the geologic information

  • NODULAR MASSES OF LIMONITE WITH PYRITE AT CENTER

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years PRE-1906

Mining district

District name Georgetown (Southern Cross, Cable) District

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner Paul A. Fusz And John R. Lucas
    Home office Philipsburg, Mt.

Comments on the production information

  • SEVERAL $1000 IN AU FROM A THOUSAND TONS OF ORE.

Workings at the site

  • Type of workings Underground
    Length 625M

Comments on the workings information

  • TUNNEL, WINZE, DRIFTS, EAST END A SHAFT CONNECTS WITH THE SURFACE CROSSCUT TUNNEL INTERSECTS THE LODE 125 FT FROM PORTAL AND THEN FOLLOWS THE LODE E FOR 400 FT. 100 FT WINZE IS SUNK ON THE VEIN 380 FT FROM THE PORTAL, DRIFTS ARE RUN FROM IT MIDWAY OF ITS DEPTH AND AT THE BOTTOM.

Reference information

Bibliographic references

  • Deposit

    MONT. BUREAU OF MINES & GEOL. INF. CIRC. 13, 1956, PL. 4

  • Deposit

    USGS PP 78, P. 235.

  • Production

    CALKINS, AND EMMON 1913 USGS PROF. PAPER 78

General comments

Subject category Comment text
Deposit DIP FROM 60-85S, CALCITE VEINLETS CUT LODE AT LARGE ANGLES, ORIGINAL ORE WAS A SILICEOUS PYRITIC REPLACEMENT OF COUNTRY ROCK.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1974 Unknown U.S. Geological Survey
Updater 01-NOV-1980 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.

External references

Maps centered on this site