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  3. Mineral Resource Data System (MRDS)

Cache Creek - South

Occurrence in Alaska, United States with commodity 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. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10307787
Record type Site
Current site name Cache Creek - South

Geographic coordinates

Geographic coordinates: -154.09897, 63.5575 (WGS84)
Relative position The Cache Creek South occurrence is located at approximately 2,400 feet (732 m) in elevation at the head of Cache Creek, a tributary to the South Fork of White Mountain Creek in Section 30, T. 22 S., R. 25 E., of the Kateel River Meridian. Location is known to within 100 feet (30 m).

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Medfra C-3(quadrangle 1:63,360 scale)

Medfra N(quadrangle 1:100,000 scale)

Medfra C(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
Zinc Critical Primary

Materials information

Materials Type of material
Sphalerite Ore
Dolomite Gangue

Alteration

  • (Local) Recrystallized dolomite.

Mineral occurrence model information

Model code 224
USGS model code 32a
Deposit model name Mississippi Valley, S.E. Missouri Pb-Zn
Mark3 model number 42

Host and associated rocks

  • Host or associated Host
    Rock type
    Stratigraphic age (youngest) Silurian

Nearby scientific data

(1) -154.09897, 63.5575
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Intense zinc-bearing solution breccia zone hosted in Paradise Fork Formation of Dutro and Patton (1982), which is also unit 'Sic' of Andrews and Rishel (1982). The zone appears to be about 10 feet (3 m) thick, and can be traced for about 200 feet (61 m) along a strike direction of N 55 E. Mineralization difficult to recognize due to the elusive color (pale tan) of sphalerite. Host rock is inferred to be Silurian based on age of the 'Sic' unit (Patton and others 1980; Blodgett, 1982). Four surface grab samples ranged from 0.64 percent to 6.40 percent zinc and averaged 2.20 percent zinc, with no appreciable lead (Andrews and Rishel, 1982).
  • Age = the host rock is probably Silurian based on age of 'Sic' unit (Blodgett, 1982). The age of the mineralization is unknown.

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name McGrath

Comments on the workings information

  • Workings / Exploration = The Cache-Creek-South was discovered in the late 1970s during regional exploration conducted by WGM Inc. on lands selected by Doyon Ltd. Four surface grab samples contained 0.64 percent to 6.40 percent zinc and averaged 2.20 percent zinc, with no appreciable lead (Andrews and Rishel, 1982).

Reference information

Bibliographic references

  • Deposit

    Patton, W.W., Jr., Moll, E.J., Dutro, J.T., Jr., Silberman, M.L., and Chapman, R.M., 1980, Preliminary geologic map of Medfra quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-811-A, 1 sheet, scale l:250,000.

  • Deposit

    Andrews, Tom, and Rishel, John, 1982, Annual Report for 198, Reef Ridge I-to-XIII Project Areas, Kuskokwim Block, Alaska: Anchorage, Alaska, WGM Inc., Project Report 4, 45 pages, two sheets at 1:63,360 and 1:20,000 scales. (Report held by Doyon, Limited, Fairbanks, Alaska.)

  • Deposit

    Blodgett, R.B., 1982, Stratigraphy of Reef Ridge project area: WGM Inc., Anchorage, Alaska, Reef Ridge Project area, Block 10, Doyon region: 34 pages.

  • Deposit

    Dutro, T.T. Jr., and Patton,W.W. Jr., 1982, New Paleozoic Formations in the northern Kuskokwim Mountains, west-central Alaska: U.S. Geological Survey Bulletin 1529-H, p. H13-H22.

Comments on the references

  • Primary Reference = Andrews and Rishel, 1982

General comments

Subject category Comment text
Deposit Model Name = Southeast Missouri Pb-Zn (Cox and Singer, 1986; model no. 32a) or Mississippi Valley Type
Deposit Other Comments = See Reef Ridge (MD055) and Cache Creek North (MD037) Mississippi Valley Type showings. The Cache Creek - South occurrence is on lands selected or owned by Doyon Ltd. For further information, contact Doyon Ltd. at 210 1st Ave., Fairbanks, Alaska, 99701.

Reporter information

Type Date Name Affiliation Comment
Reporter 02-JUN-98 Bundtzen, T.K. Pacific Rim Geological Consulting

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.