Anacortes

Occurrence in Skagit county in Washington, United States with commodities Chromium, Platinum
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. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Land status
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10048488
MRDS ID MP00077
Record type Site
Current site name Anacortes

Geographic coordinates

Geographic coordinates: -122.62487, 48.5023 (WGS84)
Elevation 30
Location accuracy 1000(meters)
Relative position Est Imated Within City Of Anacortes. Topo Maps Show No Mine Or Prospect Symbols Nearby

Site location context

Political divisions (FIPS codes)

Skagit(county)

Washington(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Anacortes North(quadrangle 1:24,000 scale)

Bellingham(quadrangle 1:100,000 scale)

Victoria(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Strait of Georgia(hydrologic unit)

Puget Sound(hydrologic accounting unit)

Puget Sound(hydrologic subregion)

Pacific Northwest(hydrologic region)

Geographic areas

Country State County
United States Washington Skagit

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 035N 001E Washington

Comments on the location information

  • NEAR ANACORTES

Commodities

Commodity Importance
Chromium Critical Primary
Platinum Critical Tertiary

Materials information

Materials Type of material
Chromite Ore

Alteration

  • (Local) Dunite Is Serpentinized

Analytical data

Result $.41/TON AU+PT IN NATURAL BLACK SAND

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 Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite
    Rock unit name Fidalgo Complex
    Rock description Fidalgo Complex
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite

Economic information

Geologic structures

Type of structure Regional
Structure description San Juan Thrust System

Ore body information

  • General form UNKNOWN, POSSIBLY MASSIVE AND DISSEMINATED

Controls for ore emplacement

  • Magmatic Segregation

Comments on the geologic information

  • GEOLOGY PRESUMED THE SAME AS AT NEARBY READY CASH DEPOSIT ON CYPRESS ISLAND WEST OF ANACORTES, WHERE CHROMITE IS IN PART OF OPHIOLITE-ARC VOLCANIC SEQUENCE IN THE DECATUR TERRANE, STRUCTURALLY HIGHEST UNIT OF THE SAN JUAN THRUST SYSTEM.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Land status

Ownership category Private

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit SEE ALSO: MRDS M700343.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-91 Peterson, Jocelyn A. U.S. Geological Survey

Beyond USGS

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