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Jumbo Mountain

Occurrence in Snohomish county in Washington, United States with commodities Nickel, Cobalt, Copper
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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. Economic information about the deposit and operations
  11. Mining district
  12. Land status
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10068217
MRDS ID W001167
Record type Site
Current site name Jumbo Mountain
Related records 10204979

Geographic coordinates

Geographic coordinates: -121.589, 48.19425 (WGS84)
Elevation 1036
Location accuracy 1000(meters)
Relative position ABOUT 4 MI SOUTH OF DARRINGTON, Estimated At Head Of Asbestos Creek On Jumbo Mountain

Site location context

Political divisions (FIPS codes)

Snohomish(county)

Washington(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Helena Ridge(quadrangle 1:24,000 scale)

Sauk River(quadrangle 1:100,000 scale)

Concrete(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Sauk(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)

Boulder River Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Washington Snohomish

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 031N 009E 12 Washington

Comments on the location information

  • UNSURVEYED

Commodities

Commodity Importance
Nickel Critical Primary
Cobalt Critical Primary
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Pentlandite Ore
Pyrrhotite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite
    Rock unit name Eastern Melange Belt;Eastern Melange Belt
    Rock description Eastern Melange Belt;Eastern Melange Belt
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
    Rock unit name Barlow Pass Volcanics
    Rock description Barlow Pass Volcanics;Barlow Pass Volcanics

Nearby scientific data

(1) -121.589, 48.19425
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: DUNITE AND GABBRO HAVE INTRUDED TERTIARY QUARTZITE AND ARGILLITE. THE DUNITE CARRIES NICKEL IN DISSEMINATED PYRRHOTITE AND IN OLIVINE. HIGHER CONCENTRATIONS OF PYRRHOTITE, PENTLANDITE AND (LATER) CHALCOPYRITE ARE IN SHEAR ZONES, IN ALTERED DUNITE, UP TO 30 FT. WIDE ALONG DUNITE-QUARTZITE CONTACTS. UP TO 3% NICKEL REPORTED. COBALT NOT MENTIONED BUT ESTIMATED(BY J.S.VHAY)TO BE PRESENT IN AMOUNTS AT ABOUT 1/20 TH OF THE NI& CU

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Darrington District

Land status

Ownership category National Wilderness
Area name In Boulder River Wilderness In Mount Baker National Forest

Comments on the reserve resource information

  • RAW PROSPECT; NO RESERVES REPORTED

Reference information

Bibliographic references

  • Deposit

    MILLS, J.W., 1960, MINING ENGINEERING, V.12, NO. 3, MARCH, 1960, P. 272-274.

  • Deposit

    TABOR, R.W., BOOTH, D.B., VANCE, J.A., FORD, A.B., AND ORT, M.H., 1988, PRELIMINARY GEOLOGIC MAP OF THE SAUK RIVER 30 BY 60 MINUTE QUADRANGLE, WASHINGTON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 88-692, SCALE 1:100,000.

  • Reserve-Resource

    UNPUBLISHED COBALT REPORT

General comments

Subject category Comment text
Deposit DESPITE THE FACT THAT THE MICKELIFEROUS SULFIDES OCCUR IN THE DUNITE DIKES BOTH AS DISSEMINATIONS AND AS CONCENTRATIONS ALONG SHEARED WALLS, MILLS(1960)FAVORED THE YOUNGER GABBRO BODY AS THE SOURCE OF THE MINERALIZING SOLUTION ; INFO.SRC : 1 PUB LIT
Deposit MRDS RECORD US53007 HAS BEEN MERGED WITH THIS RECORD AND DELETED

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-73 Coury, Anny B. U.S. Geological Survey
Updater 01-FEB-91 Peterson, Jocelyn A. U.S. Geological Survey

Beyond USGS

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

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