Campbell and Boedeker

Prospect in Alaska, United States with commodity Gold

Geologic information

Identification information

Deposit ID 10000678
MRDS ID A011302
Record type Site
Current site name Campbell and Boedeker

Geographic coordinates

Geographic coordinates: -147.38609, 63.17574 (WGS84)
Relative position This prospect is at an elevation of about 3,900 feet in a small valley between Sunny Gulch and upper Timberline Creek. It is about 2.5 miles east of the old town of Denali, in SW1/4 section 16, T. 20 S., R. 2 E., Fairbanks Meridian. The location is accurate to within 250 feet.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Quartz Gangue

Alteration

  • (Local) Pyritization.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -147.38609, 63.17574

Comments on the geologic information

  • Geologic Description = The Campbell and Boedecker prospect explores one of several mineral deposits in a belt south of Valdez Creek. The Valdez Creek area is underlain by pre-Upper Triassic pelitic clastic rocks, minor tuff, limestone lenses, and conglomerate. The rocks apparently vary abruptly in regional metamorphosed grade, from prehnite-pumpellyite through greenschist and amphibolite, to granulite. These rocks are intruded by Upper Jurassic alkali gabbro and by dioritic intrusions of Late Cretaceous and Early Tertiary age (Smith, 1981).? the bedding and foliation of the strata strike about N 75 E and dip steeply northwest. Strike-slip faults having a similar orientation are also present, particularly on the south side of Valdez Creek (Smith, 1981). On the north side of the creek, a northwest-dipping thrust fault in part explains an apparent 'telescoping' of the metamorphic rocks.? the deposit consists of two-foot-thick auriferous quartz vein that cuts sheared and locally pyritized diorite. The vein contains up to 50% pyrite; it strikes N 85 E and dips 68 N. A sample of sulfide concentrates assayed 1.9 ounces of gold per ton and 1.5 ounces of silver per ton. A sample of the sheared and pyritized diorite assayed 0.18 ounces of gold per ton (Tuck, 1938).
  • Age = Late Cretaceous or younger.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Valdez Creek

Comments on the workings information

  • Workings / Exploration = A 20-foot tunnel did not penetrate weathered zone but did give good exposure of vein and host rock. A sample of sulfide concentrates assayed 1.9 ounces of gold per ton and 1.5 ounces of silver per ton. A sample of the sheared and pyritized diorite assayed 0.18 ounces of gold per ton (Tuck, 1938).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011302
USGS Alaska Resource Data File ARDF HE201

Bibliographic references

  • Deposit

    Tuck, Ralph, 1938, The Valdez Creek mining district, Alaska, in 1936: U.S. Geological Survey Bulletin 897-B, p. 109-131.

  • Deposit

    Smith, T.E., 1981, Geology of the Clearwater Mountains, south-central Alaska: Alaska Division of Geological "&" Geophysical Surveys Geologic Report 60, 72 p., 3 sheets, scale 1:63,360.

Comments on the references

  • Primary Reference = Tuck, 1938

General comments

Subject category Comment text
Deposit Model Name = High-sulfide auriferous quartz vein.

Reporter information

Type Date Name Affiliation Comment
Reporter 07-APR-2000 D.L. Stevens Stevens Exploration Management Corporation