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

Ribbon

Past Producer in Whatcom county in Washington, United States with commodity Chromium
Map
XML
JSON
KML
B
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. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10048535
MRDS ID MP00127
Record type Site
Current site name Ribbon
Alternate or previous names Washington Chrome
Related records 10093099

Geographic coordinates

Geographic coordinates: -121.95568, 48.71537 (WGS84)
Elevation 1181
Relative position ABOUT 0.85 MI NORTHWEST OF LAKE WISEMAN

Site location context

Political divisions (FIPS codes)

Whatcom(county)

Washington(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Twin Sisters Mountain(quadrangle 1:24,000 scale)

Mount Baker(quadrangle 1:100,000 scale)

Concrete(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Nooksack(hydrologic unit)

Puget Sound(hydrologic accounting unit)

Puget Sound(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Mt. Baker-Snoqualmie National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Mount Baker Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Washington Whatcom

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 037N 007E 07 W2 Washington

Comments on the location information

  • ON NORTHWEST VALLEY WALL OF GREEN CREEK

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore
Anthophyllite Gangue
Clinochlore Gangue
Magnetite Gangue
Olivine Gangue
Prehnite Gangue
Pyroxene Gangue
Serpentine Gangue
Staurolite Gangue
Tourmaline Gangue

Alteration

  • (Local) Dunite Is Serpentinized

Analytical data

Result ORE SHIPMENT RAN 51.2% CR2O3, CR:FE=3.06:1

Mineral occurrence model information

Model code 15
USGS model code 8a
Deposit model name Podiform chromite (minor)
Mark3 model number none

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite
    Rock unit name Twin Sisters Dunite
    Rock description Twin Sisters Dunite
    Stratigraphic age (youngest) Early Cretaceous
    Stratigraphic age (youngest) Early Cretaceous

Nearby scientific data

(1) -121.95568, 48.71537
ListMap

Economic information

Ore body information

  • General form LENSES AND PODS
    Thickness 0.91M
    Length 6.1M
    Width 4.57M

Controls for ore emplacement

  • Magmatic Segregation

Comments on the geologic information

  • TWIN SISTERS DUNITE IS LARGEST ULTRAMAFIC BODY IN NORTHWESTERN CASCADES

Economic information about the deposit and operations

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

Mining district

District name Sisters District

Land status

Ownership category National Wilderness
Area name In Mount Baker Wilderness In Mount Baker National Forest

Ownership information

  • Type Owner
    Owner Washington Chrome Co.,
    Home office Seattle
    First year 1934

Comments on the workings information

  • OPEN CUT

Reference information

Bibliographic references

  • Deposit

    DERKEY, R.E., JOSEPH, N.L., AND LASMANIS, RAYMOND, 1990, METAL MINES OF WASHINGTON - PRELIMINARY REPORT: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 90-18, P. 566.

  • Deposit

    HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 42.

  • Production

    HUNTTING, 1956

General comments

Subject category Comment text
Deposit MINERALIZATION OF PODS AND LENSES LACKS CONTINUITY. DIMENSIONS GIVEN ARE FOR ONE LENS
Deposit SEE ALSO MRDS RECORD M700107

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1992 Peterson, Jocelyn A. 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