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Kelsey

Prospect in Okanogan county in Washington, United States with commodities Copper, Molybdenum, Silver, Gold
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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. 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. Mineral rights holdings
  17. Land status
  18. Ownership information
  19. Reserves and resources
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10099365
MRDS ID SP00237
MAS/MILS ID 0530470066
Record type Deposit
Current site name Kelsey
Alternate or previous names Hart Stone, Stone

Geographic coordinates

Geographic coordinates: -119.47923, 48.99484 (WGS84)

Site location context

Political divisions (FIPS codes)

Okanogan(county)

Washington(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Oroville(quadrangle 1:24,000 scale)

Oroville(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)

Federal lands

Bureau of Land Management(Bureau of Land Management OR)

Bureau of Land Management OR BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Washington Okanogan

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 040N 027E 5,6,7,8 Washington

Commodities

Commodity Importance
Copper Primary
Molybdenum Primary
Silver Primary
Gold Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Chrysocolla Ore
Malachite Ore
Molybdenite Ore
Actinolite Gangue
Calcite Gangue
Chlorite Gangue
Epidote Gangue
Garnet Gangue
Magnetite Gangue
Pyrrhotite Gangue
Quartz Gangue
Sericite Gangue
Pyrite Gangue

Alteration

  • (Local) quartz-sericite

Analytical data

Result 2.62% Cu, .6 OZ Ag, .04 OZ Au \n

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Silver Nail Pluton;Silver Nail Pluton
    Rock description Silver Nail Pluton;Silver Nail Pluton
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
    Rock unit name Anarchist Group
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Rock unit name Anarchist Group
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite

Nearby scientific data

(1) -119.47923, 48.99484
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description To The North In British Columbia, Distribution Of Major Porphyry Copper Deposits Is, In Part, Controlled By The Quesnel Trough. The Kelsey Property Lies On The Southward Projection Of This Structural Trough And Is Similar To Mined Deposits To The North.
Type of structure Local
Structure name Submarginal Ore Body

Ore body information

  • General form Along joint planes
  • General form Disseminated
    Thickness 180M
    Length 2134M
    Width 304M
    Area 87HA
    Depth to top 12M

Comments on the ore body information

  • From Derkey and others (1990, p. 216) The bulk of the mineralization is in the Silver Nail pluton, a coarsely crystalline quartz diorite. The intrusive is sheeted; contacts between the various phases are fairly flat. Sills and thrust faults are present. At the south end of the property, the pluton is brecciated. Permian Anarchist Group rocks (slate, phyllite, impure marble, greenstone, metaconglomerate, and metawacke) were incorporated as fragments in the breccia and as slivers in the pluton. The most concentrated copper-molybdenum mineralization is associated with quartz-sericite alteration and intense fracturing; country rock surrounding the mineralized zone is chloritized. Mineralization in greenstone and limy portions of the Anarchist Group consists of copper-bearing tactite containing pyrrhotite, minor garnet, and epidote. Quartz veins contain chalcopyrite-rich pods. Huntting (1956, p. 67) reports 18 assays averaging 2.62% Cu, 0.6 oz/ton Ag, and 0.04 oz/ton Au. During the 1960s, exploration programs for porphyry copper deposits outlined two zones in the pluton. The Central Zone is 4,800 ft long, has a northwest-trending axis, and averages 1,530 ft wide. It contains 66,575,200 tons of indicated ore averaging 0.286% Cu and an additional 137,560,000 tons of inferred ore of similar grade. The geological potential of the central zone to a depth of 600 ft is 280,000,000 tons. Molybdenum credits are variable and range from 0.015 to 0.02% MoS2. Hole K-3 drilled by Inland Copper Ltd. encountered 85 ft of ore averaging 0.407% Cu and 0.13% Mo. The Northwest Zone contains a total of 34,320,000 tons of indicated and inferred ore grading 0.241% Cu. The Northwest Zone extends across the international boundary into British Columbia.

Controls for ore emplacement

  • Joints And Fractures

Comments on the geologic information

  • From Derkey and others (1990, p. 216) The major rock type at the Kelsey deposit is the Jurassic-Cretaceous (?) Silver Nail quartz diorite pluton. Subordinate intrusive rock types are quartz monzonite and syenite. Late aplite occurs near the south contact. All intrude Permian Anarchist Group greenstone, phyllite, slate, and minor marble, limestone, and quartzite. Tertiary conglomerate and dacite adjoining the deposit are not altered, and therefore, are post ore.
  • From Derkey and others (1990, p. 216) Tectonics: To the north in British Columbia, distribution of major porphyry copper deposits is, in part, controled by the Quesnel trough. The Kelsey property lies on the southward projection of this structural trough and is similar to mined deposits to the north.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Large
Significant No

Mining district

District name Oroville
District name Similkameen
District name Okanogan

Mineral rights holdings

Type of mineral rights Located Claim
Type of mineral rights Patented
Type of mineral rights Private Lease

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Inland Copper, Ltd.
    Home office 401 - 1111 West Hastings, Vancouver, B.C., Canada
    Year 1972
  • Type Owner
    Owner W. G. Hallauer
    Interest 100
    Home office Washington
    Year 1990

Reserves and resources

  • Type In-situ
    Name Central Zone
    Estimate year 1990
    Indicated 66575200mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper 0.286 wt-pct Copper Primary 1990
  • Type In-situ
    Name Central Zone
    Estimate year 1990
    Inferred 137560000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper 0.286 wt-pct Copper Primary 1990
  • Type In-situ
    Name Northwest Zone
    Estimate year 1990
    Total resources 34320000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper 0.241 wt-pct Copper Primary 1990

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

    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

    ROPER, M.W., 1973, GEOLOGY OF THE KELSEY COPPER-MOLYBDENUM PROPERTY, OKANOGAN COUNTY, WASHINGTON: MONTANA STATE UNIVERSITY MASTER OF SCIENCE THESIS, 97 P., 5 PL.

  • Deposit

    UMPLEBY, J.B., 1911, PART I.-- GEOLOGY AND ORE DEPOSITS OF THE MYERS CREEK MINING DISTRICT; PART II. -- GEOLOGY AND ORE DEPOSITS OF THE OROVILLE-NIGHTHAWK MINING DISTRICT: WASHINGTON GEOLOGICAL SURVEY BULLETIN 5, 111 P.

  • Deposit

    UNPUBLISHED INFORMATION: GRANT, A.R., 1974, REPORT OF EVALUATION, KELSEY PROPERTY, OKANOGAN COUNTY, WASHINGTON. GRANT, A.R., 1980, SUMMARY REPORT, KELSEY PROPERTY, OKANOGAN COUNTY, WASHINGTON. THESE REPORTS ARE IN DGER FILES.

General comments

Subject category Comment text
General From Derkey and others (1990, p. 216) The Kelsey property, in 1974, consisted of 15 patented claims, 91 unpatented claims, and land held in fee. It was discovered in the late 1800s, and attempts were made to develop the higher grade quartz veins. From 1965 to 1974 American Smelting and Refining Co., Inland Copper Ltd., Canadian Superior Exploration Ltd., St. Joe Minerals Corp., Placer-Amex Inc., and U.S. Borax explored the property for porphry copper deposits. They drilled a total of 36,085 ft of X-ray, rotary, percussion, and core holes. The property in now (1990) owned by Wilbur G. Hallauer of Oroville.

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
Reporter 14-JUL-1997 Sweeney, Thomas M. U.S. Bureau of Mines
Reporter 01-FEB-1975 McCoy, Gail U.S. Geological Survey
Updater 01-DEC-1982 Lawson, William A. (Evarts, Russell C.) U.S. Geological Survey

Beyond USGS

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

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