Prospect in Alaska, United States with commodity Gold

Geologic information

Identification information

Deposit ID 10003472
MRDS ID A106230
Record type Site
Current site name Keystone

Geographic coordinates

Geographic coordinates: -149.24268, 61.79956 (WGS84)
Relative position On mountainside west of Sydney Creek, approximately 1 mile southwest of the confluence of Sydney Creek with Archangel Creek. This is locality 24 from Figure 9 (Cohen, 1982). Accurate within 1,000 feet.
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Geographic areas

Country State
United States Alaska


Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold 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 Host
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -149.24268, 61.79956

Comments on the geologic information

  • Geologic Description = Details about the prospect are unavailable. Most likely, a gold-bearing quartz vein(s) cuts the Late Cretaceous Willow Creek Pluton. The Willow Creek Pluton is a zoned pluton. The outer part consists of hornblende quartz diorite and lesser hornblende tonalite; the core consists of hornblende-biotite granodiorite, and lesser hornblende-biotite quartz monzodiorite and biotite quartz monzonite.
  • Age = Late Cretaceous or younger; the host of mineralization is the Late Cretaceous Willow Creek Pluton.
  • Age = Host rock is Late Cretaceous.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Willow Creek

Comments on the workings information

  • Workings / Exploration = Apparently only minor surface prospecting.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A106230
USGS Alaska Resource Data File ARDF AN045

Bibliographic references

  • Deposit

    Cohen, K.K., 1982, Independence mine and the Willow Creek mining district: Alaska Division of Parks Miscellaneous Publications, History of Archaeology series, No. 32, 169 p.

Comments on the references

  • Primary Reference = Cohen, 1982

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 30-JUL-1998 D.P. Bickerstaff U.S. Geological Survey