Widstedt No. 1

Prospect in Alaska, United States with commodities Antimony, Gold

Geologic information

Identification information

Deposit ID 10308960
MRDS ID A012846
Record type Site
Current site name Widstedt No. 1
Related records 10002001

Geographic coordinates

Geographic coordinates: -165.39467, 64.57898 (WGS84)
Relative position The Widstedt No. 1 prospect is on the southeast side of Anvil Creek, approximately at the Snake River road crossing. The map location is in the west-central part of section 36, T. 10 S., R. 34 W., Kateel River Meridian. This is locality 48 of Cobb (1972 [MF 463], 1978 [OFR 78-93]) and locality 19 of Hummel (1962 [MF 247]).
(click for info)

Geographic areas

Country State
United States Alaska


Commodity Importance
Antimony Primary
Gold Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Jarosite Ore
Kermesite Ore
Pyrite Ore
Stibiconite Ore
Stibnite Ore
Quartz Gangue


  • Silicification and sulfidization of graphitic schist.

Mineral occurrence model information

Model code 180
USGS model code 27d
Deposit model name Simple Sb (veins, pods, etc)

Nearby scientific data

(1) -165.39467, 64.57898

Comments on the geologic information

  • Geologic Description = The Widstedt No. 1 (Widstedt tunnel) prospect is in the Anvil Creek fault zone (Mertie, 1918 [B 662-I, p. 430]; Cathcart, 1922, p. 238-239; Hummel, 1962 [MF 247]). At the prospect, graphitic schist is contorted, broken, and commonly stained with jarosite, probably after very fine grained pyrite. Locally a bright yellow mineral and a red mineral are associated with veinlets of stibnite. The yellow and red minerals are herein inferred, respectively, to be stibiconite and kermesite, minerals formed by the oxidation of stibnite. A 70-foot crosscut was driven by J.C. Widstedt in 1899, and several tons of stibnite ore were produced from the workings. Coarsely crystalline stibnite occured in kidneys enveloped in pyrite and arsenopyrite-bearing schist. Maximum gold assays reportedly exceeded 3 ounces per ton; silver and some copper were also reported. In general, however, the deposit appears to contain little gold.
  • Age = Probably mid-Cretaceous or younger; see NM207.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Probably inactive

Mining district

District name Nome

Comments on the workings information

  • Workings / Exploration = The antimony-bearing shear zone was explored by workings as early as 1899; antimony prospecting continued through World War I.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF NM234
USGS Mineral Resources Data System MRDS A012843
USGS Mineral Resources Data System MRDS A012846

Bibliographic references

  • Deposit

    Cathcart, S.H., 1922, Metalliferous lodes in southern Seward Peninsula: U.S. Geological Survey Bulletin 722, p. 163-261.

  • Deposit

    Hummel, C.L., 1962, Preliminary geologic map of the Nome C-1 quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-247, 1 sheet, scale 1:63,360.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Nome quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-463, 2 sheets, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Nome quadrangle, Alaska: U.S. Geological Survey Open-File report 78-93, 213 p.

  • Deposit

    Mertie, J.B., Jr., 1918, Placer mining on Seward Peninsula: U.S. Geological Survey Bulletin 662, p. 451-458.

Comments on the references

  • Primary Reference = Cathcart, 1922

General comments

Subject category Comment text
Deposit Model Name = Simple Sb deposits (Cox and Singer, 1986; model 27d).

Reporter information

Type Date Name Affiliation Comment
Reporter 10-JUL-00 Hawley, C.C. and Hudson, Travis L. Hawley Resource Group