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Last Chance

Past Producer in Okanogan county in Washington, United States with commodities Silver, Lead, Copper, Zinc
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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. Geologic structures
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10099366
MRDS ID SP00242
Record type Site
Current site name Last Chance
Alternate or previous names Ruby Lode Claim

Geographic coordinates

Geographic coordinates: -119.74117, 48.4915 (WGS84)
Elevation 914

Site location context

Political divisions (FIPS codes)

Okanogan(county)

Washington(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ruby Hill(quadrangle 1:24,000 scale)

Omak(quadrangle 1:100,000 scale)

Okanogan(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Okanogan(hydrologic unit)

Upper Columbia(hydrologic accounting unit)

Upper Columbia(hydrologic subregion)

Pacific Northwest(hydrologic region)

Geographic areas

Country State County
United States Washington Okanogan

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 035N 025E 31 E2 Washington

Comments on the location information

  • AT THE NORTH END OF RUBY HILL

Commodities

Commodity Importance
Silver Primary
Lead Primary
Copper Primary
Zinc Critical Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Sphalerite Ore
Tetrahedrite Ore
Pyrite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Hornblendite
    Rock unit name Conconully Granodiorite;Metamorphic Complex Of Conconully
    Rock description Conconully Granodiorite;Metamorphic Complex Of Conconully

Nearby scientific data

(1) -119.74117, 48.4915
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description The Quartz Monzonite Was Probably Emplaced In A Magmatic Arc.

Controls for ore emplacement

  • The Quartz Fissure Vein That Averages 12 Feet In Width Strikes S50e And Dips 70sw. Ore Minerals Are Concentrated In Ore Shoots That Are 2-4 Feet Thick And As Much As 200 Feet Long. Ore Minerals Are Sparsely Disseminated Between Ore Shoots (Moen, 1973, P. 18).

Comments on the geologic information

  • THE VEIN IS IN GRANODIORITE OF CRETACEOUS AGE NEAR THE CONTACT WITH HORNBLENDE-BIOTITE SCHIST OF THE METAMORPHIC COMPLEX OF CONCONULLY (GULICK AND KOROSEC, 1990, GEOL. MAP).

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Conconully, Ruby Hill Area

Comments on the production information

  • ORE WAS BLOCKED OUT BUT WAS NOT MINED BECAUSE OF THE SILVER PANIC OF 1883. IN 1920 THE MINE WAS REOPENED, AND ORE THAT AVERAGED 30 OZ/TON AG, 17% PB, AND 4% CU WAS SHIPPED TO A SMELTER AT BRADLEY, IDAHO. SMALL SHIPMENTS OF ORE WERE MADE AGAIN IN 1921 AND 1924 (MOEN, 1973, P. 18).

Reference information

Bibliographic references

  • Deposit

    DERKEY, R.E.; JOSEPH, N.L.; LASMANIS, R., 1990, METAL MINES OF WASHINGTON-PRELIMINARY REPORT: STATE OF WASHINGTON, DEPARTMENT OF NATURAL RESOURCES, DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 90-18, 577 P.

  • Deposit

    GULICK, C.W.; KOROSEC, M.A., COMPILERS, 1990, GEOLOGIC MAP OF THE OMAK 1:100,000 QUADRANGLE, WASHINGTON: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 90-12, 52 P., 1 PL.

  • 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

    MOEN, W.S., 1973, CONCONULLY MINING DISTRICT OF OKANOGAN COUNTY, WASHINGTON: WASHINGTON DIVISION OF MINES AND GEOLOGY INFORMATION CIRCULAR 49, 42 P.

  • Deposit

    PATTY, E.N., 1921, THE METAL MINES OF WASHINGTON: WASHINGTON GEOLOGICAL SURVEY BULLETIN 23, 366 P.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1991 Berger, Mary A. U.S. Geological Survey
Updater 01-SEP-1993 Frank, Dave U.S. Geological Survey

Beyond USGS

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

External references

Maps centered on this site