Kelsey

The Kelsey is a molybdenum, copper, silver, and gold mine located in Okanogan county, Washington.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Kelsey
Secondary: Hart Stone
Secondary: Stone

Commodity

Primary: Molybdenum
Primary: Copper
Primary: Silver
Primary: Gold

Location

State: Washington
County: Okanogan
District: Oroville

Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Type: Private Lease
Type: Patented
Type: Located Claim

Workings

Not available

Ownership

Owner Name: W. G. Hallauer
Percent: 100.0
Home Office: Washington
Info Year: 1990

Owner Name: Inland Copper, Ltd.
Home Office: 401 - 1111 West Hastings, Vancouver, B.C., Canada
Info Year: 1972

Production

Not available

Deposit

Record Type: Deposit
Operation Category: Prospect
Deposit Type: Hydrothermal Veins, Replacement, Disseminated
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: L

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains

Mineral Deposit Model

Not available

Orebody

Form: Disseminated

Form: Along joint planes

Structure

Type: L
Structure: Submarginal Ore Body

Type: R
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.

Alterations

Alteration Type: L
Alteration: quartz-sericite

Rocks

Not available

Analytical Data

Analytical Data: 2.62% Cu, .6 OZ Ag, .04 OZ Au

Materials

Ore: Chrysocolla
Ore: Molybdenite
Ore: Malachite
Ore: Chalcopyrite
Gangue: Sericite
Gangue: Garnet
Gangue: Chlorite
Gangue: Quartz
Gangue: Pyrrhotite
Gangue: Magnetite
Gangue: Calcite
Gangue: Epidote
Gangue: Actinolite
Gangue: Pyrite

Comments

Comment (Orebody): 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.

Comment (Geology): 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.

Comment (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.

Comment (Geology): 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.

References

Reference (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.

Reference (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.

Reference (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.

Reference (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.

Reference (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.

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