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Mount Vernon

Occurrence in Skagit county in Washington, United States with commodities Nickel, Gold, Chromium
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Geologic information

Identification information

Deposit ID 10047917
MRDS ID M700267
Record type Site
Current site name Mount Vernon
Alternate or previous names Devils Mountain, Pacific
Related records 10056088

Geographic coordinates

Geographic coordinates: -122.29291, 48.3687 (WGS84)
Elevation 305
Relative position ABOUT 3 MI NORTHEAST OF CONWAY. 4.5 MI SOUTHEAST OF MOUNT VERON BY ROAD; 1.5 MI BY ROAD FROM RAILROAD.
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Geographic areas

Country State County
United States Washington Skagit

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 033N 004E 04,09,10,11 S2 (04); NE4 (09); N2 (10); NW4 (11) Washington

Comments on the location information

  • ALONG CREST OF DEVILS AND SCOTT MOUNTAINS

Commodities

Commodity Importance
Nickel Primary
Gold Primary
Chromium Tertiary

Materials information

Materials Type of material
Bravoite Ore
Chromite Ore
Marcasite Ore
Pyrite Ore
Ankerite Gangue
Calcite Gangue
Chalcedony Gangue
Chlorite Gangue
Dolomite Gangue
Opal Gangue
Quartz Gangue
Serpentine Gangue

Alteration

  • (Local) Oxidation Of Sulfides Producing Much Limonite

Analytical data

Result 157 ASSAYS OF DRILL CORE AVERAGE 0.0195 OZ/TON AU, 0.251% NI. WEIGHTED AVERAGE OF 74 TRENCH SAMPLES: 0.293% NI. SULFIDE-BEARING BRECCIA SAMPLES AVERAGE MORE THAN 0.2% NI AND ABOUT 0.02 OZ/TON AU.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Rock unit name Haystack Terrane;Haystack Terrane
    Rock description Haystack Terrane;Haystack Terrane

Nearby scientific data

(1) -122.29291, 48.3687
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Geologic structures

Type Description Terms
Regional Devils Mountain Fault Zone Near Crest Of Devils Mountain Anticline
Local Shear Zone; Ore Body Lies On South Limb Of Large Anticlinal Fold

Ore body information

  • General form TABULAR
    Strike N70W
    Dip STEEP
    Thickness 121.92M
    Length 3218.6M

Controls for ore emplacement

  • Fault Zone Between Serpentine And Eocene Sandstone.

Comments on the geologic information

  • HAYSTACK TERRANE IS AN ACCRETED TERRANE

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1915
Discovery method Ore-Mineral In Place

Ownership information

  • Type Owner
    Owner Pacific Nickel Co.
    First year 1943

Comments on the production information

  • TEST SHIPMENTS ONLY

Reserves and resources

  • Type In-situ
    Estimate year 1941
    Total resources 22,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Nickel Ni 0.2 wt-pct Nickel Major 1941
    Gold Au 0.564 g/mt Gold Major 1941

Comments on the reserve resource information

  • EXPOSURES INDICATE AT LEAST 15 MILLION TONS NAD POSSIBLE AS MUCH AS 50 MILLION TONS OF SULFIDE-BEARING BRECCIA AT TENORS SHOWN ABOVE.

Workings at the site

  • Type of workings Surface/Underground
    Area 849.87HA

Comments on the workings information

  • 300 FT OF ADITS, 600 FT OF TRENCHES (FOR SAMPLING PURPOSES). AREA GIVEN IS PROPERTY SIZE, NOT WORKINGS SIZE

Comments on development

  • 6,375 FT OF DIAMOND DRILLING.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS M700267

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, P. 278.

  • Deposit

    HUNTTING, M.T., 1955, GOLD IN WASHINGTON: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 42, P. 87.

  • Deposit

    HOBBS, S.W., AND PECORA, W.T., 1941, NICKEL-GOLD DEPOSIT NEAR MOUNT VERNON, SKAGIT COUNTY, WASHINGTON: U.S. GEOLOGICAL SURVEY BULLETIN 931-D, P. 57-78.

  • Deposit

    DERKEY, R.E., JOSEPH, N.L., AND LASMANIS, RAYMOND, 1990, METAL MINES OF WASHINGTON - PRELIMINARY REPORT: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 90-18, P. 332.

  • Reserve-Resource

    HOBBS AND PECORA, 1941

General comments

Subject category Comment text
Deposit MRDS RECORDS US53002, W001173 HAVE BEEN MERGED WITH THIS RECORD AND DELETED
Deposit DIMENSIONS GIVEN ARE FOR 2-MI-LONG SILICA-CARBONATE ROCK WITH A CENTRAL CORE OF SULFIDE-BEARING BRECCIA. SULFIDES ARE MOSTLY DISSEMINATED IN BRECCIA BUT MINUTE VEINLETS ARE PRESENT LOCALLY. A MODEL HAS NOT YET BEEN PUBLISHED FOR THIS TYPE OF DEPOSIT
Deposit Discovery Year: 1910S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1973 Coury, Anny B. U.S. Geological Survey
Updater 01-JUL-1982 Lawson, William A. (Evarts, Russel C.) U.S. Geological Survey
Updater 01-OCT-1992 Peterson, Jocelyn A. U.S. Geological Survey