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Campbell and Boedeker

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

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.

Site location context

Political divisions (FIPS codes)

Matanuska-Susitna(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Healy A-1(quadrangle 1:63,360 scale)

Mount Hayes SW(quadrangle 1:100,000 scale)

Healy(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Susitna River(hydrologic unit)

Susitna River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

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
ListMap

Economic information

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 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

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

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.