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  3. Mineral Resource Data System (MRDS)

Bear Basin

Occurrence in King county in Washington, United States with commodities Silver, Lead, Zinc, Copper, Gold, Antimony, Tin, 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. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  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 10094251
MRDS ID D001647
Record type Site
Current site name Bear Basin
Alternate or previous names Bear Creek Prospects

Geographic coordinates

Geographic coordinates: -121.48648, 47.63953 (WGS84)
Elevation 1341
Relative position 25 MI BY ROAD FROM NORTH BEND; ABOUT 0.5 MI NORTHWEST OF LENNOX LAKE

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
Willamette 025N 010E 13,14,23,24 SW4 (13); SE4 (14); NE4 (23); NW4 (24) Washington

Comments on the location information

  • LOCATED IN GLACIAL CIRQUE AT HEAD OF BEAR CREEK. LOCATION GIVEN IS FOR ADIT SYMBOL IN SEC. 23

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Critical Primary
Copper Primary
Gold Primary
Antimony Critical Tertiary
Tin Critical Tertiary
Arsenic Critical Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Freibergite Ore
Galena Ore
Jamesonite Ore
Molybdenite Ore
Pyrite Ore
Sphalerite Ore
Stannite Ore
Stibnite Ore
Quartz Gangue

Alteration

  • (Local) Sericitization, Kaolinization, Silicification

Analytical data

Result SAMPLE IN ADIT ASSAYED 0.06 OZ/TON AU, 16.9 OZ/TON AG, 0.13% ZN. SAMPLES FROM ADIT NO. 3 SHOWED 0.1-33.7 OZ/TON AG, MAX. 0.05 OZ/TON AU, AND MAX. 0.16% CU (GUALTIERI AND OTHERS, 1975
Result ALSO OTHER ASSAYS)

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 Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Snoqualmie Batholith, Northern Phase
    Rock description Snoqualmie Batholith, Northern Phase
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Miocene

Nearby scientific data

(1) -121.48648, 47.63953
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Steeply Dipping Shear Zone

Ore body information

  • General form VEIN
    Strike N75W; N50W
    Dip 75-80SW; STEEP
    Thickness 1.22M
    Length 1066.8M
  • General form VEIN
    Strike N75W; N50W
    Dip 75-80SW; STEEP

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1925

Mining district

District name Buena Vista District

Land status

Ownership category National Wilderness
Area name In Alpine Lakes Wilderness In Mount Baker-Snoqualmie National Forest

Ownership information

  • Type Owner
    Owner Bear Basin Mining Co.
    Home office Bremmerton, Wa.
    First year 1952

Comments on the reserve resource information

  • RESERVES ARE ESTIMATED TO BE SMALL BUT SEVERAL AREAS MAY BE FAVORABLE FOR EXPLORATION

Workings at the site

  • Type of workings Underground
    Length 659.89M

Comments on the workings information

  • 8 ADITS, WINZE

Reference information

Bibliographic references

  • Deposit

    PURDY, C.P., JR., 1951, ANTIMONY OCCURRENCES OF WASHINGTON: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 39, P. 84-87.

  • Deposit

    HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 295.

  • Deposit

    GUALTIERI, J.L., THURBER, H.K., MILLER, M.S., MCMAHAN, A.B., AND FEDERSPIEL, F.F., 1975, MINERAL RESOURCES OF ADDITIONS TO THE ALPINE LAKES STUDY AREA, CHELAN, KING, AND KITTITAS COUNTIES, WASHINGTON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 75-3, P. 64-67.

  • Production

    GUALTIERI AND OTHERS, 1975

General comments

Subject category Comment text
Deposit TWO SETS OF MINERALIZED SHEAR ZONES CONTAINING QUARTZ STRINGERS OT 5.9 FT WIDE IN ADIT NO. 3. OTHER ADITS ALSO DRIVEN ON SHEAR ZONES
Deposit LAT. & LONG. ARE GENERAL ; INFO.SRC : 1 PUB LIT
Deposit SNOQUALMIE APPEARS TO BE PART OF BEAR BASIN PROPERTIES. SEE ALSO MRDS RECORD MP00222
Deposit Discovery Year: EARLY 1900'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-75 Miller, M. H. U.S. Geological Survey
Updater 01-MAY-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