1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Colorado Gulch Dolomite Deposit

Occurrence in Lewis and Clark county in Montana, United States with commodity Dolomite
Map
XML
JSON
KML
C
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. Economic information about the deposit and operations
  13. Mining district
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10019317
MRDS ID DC09494
Record type Site
Current site name Colorado Gulch Dolomite Deposit

Geographic coordinates

Geographic coordinates: -112.16394, 46.56879 (WGS84)
Location accuracy 500(meters)
Relative position ABOUT 9.0 KM SW OF HELENA.

Site location context

Political divisions (FIPS codes)

Lewis and Clark(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Black Mountain(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)

Geographic areas

Country State County
United States Montana Lewis and Clark

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 009N 004W 06 Montana

Comments on the location information

  • NEAR THE MOUTH OF COLORADO GULCH.

Commodities

Commodity Importance
Dolomite Primary

Materials information

Materials Type of material
Dolomite Ore

Analytical data

Result 21-22% MGO, 29-30% CAO.

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite
    Rock unit name Hasmark Formation
    Rock description Hasmark Formation
    Stratigraphic age (youngest) Late Cambrian
    Stratigraphic age (youngest) Late Cambrian

Nearby scientific data

(1) -112.16394, 46.56879
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Boulder Batholith

Ore body information

  • Thickness 106.68M

Comments on the geologic information

  • GEOL.DESC: 360 FT. THICK, METAMORPHOSED

Economic information about the deposit and operations

Development status Occurrence
Commodity type Non-metallic
Deposit size Small
Significant No

Mining district

District name Helena District

Reference information

Bibliographic references

  • Deposit

    KING, RH, 1943, MONTHLY PROGRESS REPORT, DOLO. DEP.

  • Deposit

    DEISS, CF, 1943, LETTER TO PJ SHENON.

General comments

Subject category Comment text
Deposit VERY PURE 21 TO 22% MGO, 29-30% CAO. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1974 Unknown U.S. Geological Survey
Updater 01-FEB-1982 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.

Maps centered on this site