Eldorado Creek Mine, Innoko Mining District, Yukon-Koyukuk Census Area, Alaska, USAi

Regional Level Types
Eldorado Creek Mine	Mine
Innoko Mining District	Mining District
Yukon-Koyukuk Census Area	Census Area
Alaska	State
USA	Country

Location: 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.
Geology: 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.
Workings: Roehm (1937) documents prospecting at an open cut along Eldorado Creek, groundsluicing at its mouth, and prospecting at the head of the creek.
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).

Commodities (Major) - Au; (Minor) - Ag
Development Status: Yes; small
Deposit Model: Placer Au (Cox and Singer, 1986; model 39a)

Other Databases

Link to USGS - Alaska:	OP007

Other Regions, Features and Areas containing this locality

References