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  3. Mineral Resource Data System (MRDS)

Unnamed (near head of Hope Creek)

Occurrence in Alaska, United States with commodities Fluorine-Fluorite, Copper, Molybdenum, Lead, REE, Antimony, Tungsten, 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. Host and associated rocks
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. Reporter information

Geologic information

Identification information

Deposit ID 10001494
MRDS ID A012241
Record type Site
Current site name Unnamed (near head of Hope Creek)

Geographic coordinates

Geographic coordinates: -146.50491, 65.41776 (WGS84)
Relative position Occurrence is sample number 025, in Holm (1973). The sample is located on the north headwater fork of Hope Creek, NW1/4 SW1/4 sec. 22, T. 7 N., R. 6 E.

Site location context

Political divisions (FIPS codes)

Fairbanks North Star(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Circle B-6(quadrangle 1:63,360 scale)

Circle SW(quadrangle 1:100,000 scale)

Circle(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Fluorine-Fluorite Critical Primary
Copper Secondary
Molybdenum Secondary
Lead Secondary
REE Critical Secondary
Antimony Critical Secondary
Tungsten Critical Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Allanite Ore
Arsenopyrite Ore
Chalcopyrite Ore
Fluorite Ore
Galena Ore
Malachite Ore
Marcasite Ore
Molybdenite Ore
Pyrite Ore
Pyrrhotite Ore
Scheelite Ore
Sphalerite Ore
Stibnite Ore
Rutile Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Mt. Prindle Pluton
    Rock description Mt. Prindle Pluton
    Stratigraphic age (youngest) Paleocene
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1) -146.50491, 65.41776
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The occurrence is a 15-cm-wide fluorite vein in a fine-grained quartz- and opal-bearing breccia zone in a contact phase of biotite granite. Minor sulfide mineralization occurs in carbonate-bearing metamorphic rocks at the head of Hope Creek. Sulfides present are pyrrhotite, marcasite, and sphalerite with blebs of chalcopyrite, pyrite and arsenopyrite. None of these minerals occurs in quantities of economic significance. Samples of granite taken near the head of Hope Creek contained trace to small amounts of allanite (?), fluorite, galena, malachite, molybdenite, pyrite, pyrrhotite, rutile, scheelite and stibnite (Holm, 1973). Biotite from this granite has been dated at 59.5 +/- 1.8 m.a. by the K/Ar method (Holm, 1973).
  • Age = The principal occurrence is a fluorite vein in a fine-grained quartz- and opal-bearing breccia zone in a contact phase of biotite granite. The biotite in the granite has been dated at 59.5 +/- 1.8 m.a. by the K/Ar method (Holm, 1973).

Economic information about the deposit and operations

Development status Occurrence
Commodity type Non-metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Circle

Comments on the workings information

  • Workings / Exploration = Surface samples taken.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Holm, 1973.

Reporter information

Type Date Name Affiliation Comment
Reporter 14-SEP-98 C.J. Freeman Avalon Development Corporation
Reporter 14-SEP-98 J.R. Guidetti Schaefer Avalon Development Corporation
Reporter 14-SEP-98 Clements, A.S. Avalon Development Corporation

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.