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Mathews River

Occurrence in Alaska, United States with commodities Gold, Lead, Silver, Copper, Zinc
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10001402
MRDS ID A012146
Record type Site
Current site name Mathews River
Related records 10281953

Geographic coordinates

Geographic coordinates: -149.50334, 67.65971 (WGS84)
Relative position The Mathews River occurrence is at an elevation of 3,600 feet on the northeast flank of Wiehl Mountain (sec. 26, T. 33 N., R. 9 W., of the Fairbanks Meridian) approximately 7 miles northeast of Sukakpak Mountain. The reference point is taken from the location shown as loc. 46 in DeYoung (1978). It should be noted that the location shown in Cobb (1972, MF 457) is approximately 1/2 mile northwest of the DeYoung (1978) location; the location is accurate within a 1-mile radius.

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chandalar C-6(quadrangle 1:63,360 scale)

Chandalar N(quadrangle 1:100,000 scale)

Chandalar(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Federal lands

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Lead Primary
Silver Secondary
Copper Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Chalcopyrite Ore
Galena Ore
Gold Ore
Sphalerite Ore
Quartz Gangue

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Host and associated rocks

  • Host or associated Associated
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone

Nearby scientific data

(1) -149.50334, 67.65971
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Early reports on this prospect described only galena in Devonian(?) greenstone and greenschist near a contact with Devonian siltstone and grit (Brosgi and Reiser, 1964). Later reports described the occurrence as a 3-foot-wide quartz vein exposed for 100 feet along strike (Mulligan, 1974). No sulfides were seen in place, but iron-stained quartz float found just below the vein contained small amounts of arsenopyrite, galena, chalcopyrite, and sphalerite. Analysis showed 3.4 ppm gold and trace silver.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Koyukuk

Reference information

Bibliographic references

  • Deposit

    Brosgi, W.P., and Reiser, H.N., 1964, Geologic map and section of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map 1-375, 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-457, 1 sheet, scale 1:250,000.

  • Deposit

    Mulligan, J.J., 1974, Mineral resources of the Trans-Alaska Pipeline corridor: U.S. Bureau of Mines Information Circular 8626, 24 p.

  • Deposit

    Grybeck, D.J., 1977, Known mineral deposits of the Brooks Range, Alaska: US Geological Survey Open-File Report 77-166C, 41 p., 1 sheet, scale 1:1,000,000.

  • Deposit

    DeYoung, J.H., Jr., 1978, Mineral resources map of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-878-B, 2 sheets, scale 1:250,000.

  • Deposit

    U.S. Bureau of Mines, 1978, Mineral appraisal of the proposed Gates of the Arctic Wilderness National Park, Alaska, A preliminary comment: U.S. Bureau of Mines Open-File Report 109-78, 29 p., 4 sheets.

  • Deposit

    Dillon, J.T., 1982, Source of lode and placer gold deposits of the Chandalar and upper Koyukuk Districts: Alaska Division of Geological and Geophysical Surveys Open-File Report 158, 25 p., 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Chandalar and Wiseman quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-340, 205 p.

Comments on the references

  • Primary Reference = Mulligan, 1974

General comments

Subject category Comment text
Deposit Model Name = Low-sulfide Au-quartz veins(?) (Cox and Singer, 1986; model 36a)

Reporter information

Type Date Name Affiliation Comment
Reporter 17-NOV-1999 J.M. Britton U.S. Geological Survey

Beyond USGS

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

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.