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  3. Mineral Resource Data System (MRDS)

Snoqualmie

Occurrence in King county in Washington, United States with commodity Copper
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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. Host and associated rocks
  9. Nearby scientific data
  10. Controls for ore emplacement
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. Reporter information

Geologic information

Identification information

Deposit ID 10055933
MRDS ID SP00145
Record type Site
Current site name Snoqualmie
Related records 10048623

Geographic coordinates

Geographic coordinates: -121.48953, 47.64453 (WGS84)

Site location context

Political divisions (FIPS codes)

King(county)

Washington(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Grotto(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)

Alpine Lakes Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Washington King

Public Land Survey System information

Meridian Township Range Section Fraction State
025N 010E 14;23 Washington

Comments on the location information

  • TOPOGRAPHIC MAP SHOWS MINES IN THE SE1/4 OF SECTION 14 AND THE NE1/4 OF SECTION 23. LOCATION SELECTED IS THE TWO POTALS IN SECTION 14.

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Tonalite
    Stratigraphic age (youngest) Miocene

Nearby scientific data

(1) -121.48953, 47.64453
ListMap

Economic information

Controls for ore emplacement

  • Gash Veins Are Present In Granodiorite. Some High-Grade Ore Came From The No. 6 Vein (Huntting, 1956, P. 59).

Comments on the geologic information

  • THE SNOQUALMIE BATHOLITH NORTHERN PHASE CONSISTS OF GRANODIORITE AND TONALITE AND IS LIGHT COLORED, MEDIUM CRYSTALLINE, AND MOSTLY EQUIGRANULAR AND HAS HYPIDIOMORPHIC TEXTURE. THE ROCKS ARE COARSELY JOINTED AND CONTAIN BIOTITE AND HORNBLENDE AND LOCALLY CLINOPYROXENE. AGE OF THE NORTHERN PHASE IS ABOUT 25 M.Y. BASED ON INTERPRETATION OF NUMEROUS DISCORDANT K-AR AGES OF BOTH HORNBLENDE AND BIOTITE (TABOR AND OTHERS, 1982, P. 8).

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Mining district

District name Miller River

Comments on development

  • ECON.COM: PRODUCED IN 1925 (HUNTTING, 1956, P. 59).

Reference information

Bibliographic references

  • Deposit

    HUNTTING, M. T., 1956, INVENTORY OF WASHINGTON MINERALS-PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, 428 P.; V. 2, 67 P.

  • Deposit

    LIVINGSTON, V.E., JR., 1971, GEOLOGY AND MINERAL RESOURCES OF KING COUNTY, WASHINGTON: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 63, 200 P., 8 PL.

  • Deposit

    TABOR, R.W.; FRIZZELL, V.A., JR.; BOOTH, D.B.; WHETTEN, J.T.; WAITT, R.B.; ZARTMAN, R.E., 1982, PRELIMINARY GEOLOGIC MAP OF THE SKYKOMISH RIVER 1:100,000 QUADRANGLE, WASHINGTON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 82-747, 31 P., 1 PL.

  • Deposit

    WDGER OF-90-18

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1991 Berger, Mary A. U.S. Geological Survey
Updater 01-DEC-1992 Frank, Dave U.S. Geological Survey

Beyond USGS

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

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