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Eldorado Creek

Past Producer in Alaska, United States with commodities Gold, Silver
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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. Mineral occurrence model information
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10308024
Record type Site
Current site name Eldorado Creek

Geographic coordinates

Geographic coordinates: -156.93101, 63.44604 (WGS84)
Relative position Eldorado Creek is a north-flowing tributary to Madison Creek. Mining and prospecting activity took place at both the head and the mouth of Eldorado Creek. The coordinates are for the placer mine near the mouth of Eldorado Creek in the SE1/4, sec. 33, T. 23 S., R. 10 E., Kateel River Meridian. The location is accurate within 1 mile.

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ophir B-2(quadrangle 1:63,360 scale)

Ophir SE(quadrangle 1:100,000 scale)

Ophir(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Materials information

Materials Type of material
Gold Ore

Mineral occurrence model information

Model code 119
USGS model code 39a
Deposit model name Placer Au-PGE
Mark3 model number 54

Nearby scientific data

(1) -156.93101, 63.44604
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The bedrock along the lower part of Eldorado Creek is volcanic; the upper part is underlain by chert, argillite, and volcaniclastic rocks. A Cretaceous or Tertiary monzonite pluton intrudes the strata in the uppermost part of the creek (Chapman and others, 1987). The monzonite contains large feldspar phenocrysts and stockwork quartz veining and is heavily weathered at the surface to quartz and feldspar (S. Dashevsky, written commun., 2000). This monzonite pluton is the likely source of the gold in Eldorado Creek (Bundtzen and others, 1987). Roehm (1937) documents prospecting at an open cut along Eldorado Creek, groundsluicing at its mouth, and prospecting at the head of the creek. Also see OP008-012.
  • Age = Quaternary. The source of the gold at Eldorado Creek may be the Cretaceous or Tertiary monzonite pluton exposed near the headwaters of the creek (Bundtzen and others, 1987).

Economic information about the deposit and operations

Development status Past Producer

Mining district

District name Innoko

Comments on the workings information

  • Workings / Exploration = Roehm (1937) documents prospecting at an open cut along Eldorado Creek, groundsluicing at its mouth, and prospecting at the head of the creek.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Roehm, 1937

General comments

Subject category Comment text
Deposit Model Name = Placer Au (Cox and Singer, 1986; model 39a)

Reporter information

Type Date Name Affiliation Comment
Reporter 07-AUG-01 Cameron, C.E. Northern Associates Inc.

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.