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  3. Mineral Resource Data System (MRDS)

Spencer

Occurrence in Snohomish county in Washington, United States with commodities Gold, Silver, Copper, Arsenic
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Reserves and resources
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10048591
MRDS ID MP00189
Record type Site
Current site name Spencer

Geographic coordinates

Geographic coordinates: -121.42677, 47.92787 (WGS84)
Elevation 823
Location accuracy 1000(meters)
Relative position ABOUT 4 MI SOUTH OF MONTE CRISTO; ABOUT 1.5 MI SOUTH OF MINERAL CITY SITE, Estimated From Claim Map In Johnson And Others

Site location context

Political divisions (FIPS codes)

Snohomish(county)

Washington(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Monte Cristo(quadrangle 1:24,000 scale)

Skykomish River(quadrangle 1:100,000 scale)

Wenatchee(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Skykomish(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)

Geographic areas

Country State County
United States Washington Snohomish

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 028N 011E 08 NEAR CENTER Washington

Commodities

Commodity Importance
Gold Primary
Silver Primary
Copper Primary
Arsenic Critical Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Quartz Gangue

Analytical data

Result MANY SAMPLES ASSAYED. MAXIMUM VALUES ARE 0.606 OZ/TON AU, 2.3 OZ/TON AG, 1.7% CU, 5.1% AS

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
    Rock unit name Swauk Formation
    Rock description Swauk Formation
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Eocene

Nearby scientific data

(1) -121.42677, 47.92787
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Faults

Ore body information

  • General form VEIN
    Thickness 0.58M
    Length 623.93M

Controls for ore emplacement

  • Fractures

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Silver Creek District

Land status

Ownership category National Forest
Area name In Snoqualmie National Forest

Reserves and resources

  • Type In-situ
    Estimate year 1983
    Total resources 226000mt ore
    Commodity Subtype Grade units Group Importance Year
    Arsenic As 2.59 wt-pct Arsenic Trace 1983
    Gold Au 1.891 g/mt Gold Major 1983
    Copper Cu 0.07 wt-pct Copper Major 1983

Workings at the site

  • Type of workings Underground
    Length 23.16M

Comments on the workings information

  • ADIT

Reference information

Bibliographic references

  • Deposit

    JOHNSON, F.L., DENTON, D.K., IVERSON, S.R., MCCULLOCH, R.B., STEBBINS, S.A., AND STOTELMEYER, R.B., 1983, MINERAL RESOURCES OF THE GLACIER PEAK RARE II AREA (NO. L6031), SNOHOMISH COUNTY, WASHINGTON: U.S. BUREAU OF MINES OPEN-FILE REPORT MLA 75-83, P. 37

  • Reserve-Resource

    JOHNSON AND OTHERS, 1983

General comments

Subject category Comment text
Deposit SULFIDE-BEARING QUARTZ VEINS AND FAULT ZONES

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-92 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