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

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

Location: Dodge Creek is a short, north-flowing tributary of the Innoko River. The junction of Dodge Creek and the Innoko River lies approximately one mile west-northwest of the town of Ophir. The coordinates are at the mine along Dodge Creek marked on the U.S. Geological Survey Ophir A-2 topographic map (1954, minor revisions 1955), in the NW1/4 sec. 22, T. 27 S., R. 12 E., Kateel River Meridian. Dodge Creek is location 12 of Cobb (1972 [MF 367]). The location is accurate within 500 feet.
Geology: The bedrock in the vicinity of Dodge Creek consists of sandstone, shale, and siltstone, and several small monzonite intrusive bodies (Chapman and others, 1985). Gold in Dodge Creek is reportedly deep (Brooks, 1916). Heavy minerals in placer concentrates include magnetite, ilmenite, siderite, pyrite, amphibole, pyroxene, and zircon (Bundtzen and others, 1987). The source of the gold may be bimodal dike swarms, peraluminous rhyolite, and alkali-calcic monzonitic intrusive rocks in the Ophir area (Bundtzen and others, 1987). Gold was discovered on Dodge Creek in 1915 and mining probably began in 1916 (Brooks, 1916). Mining continued intermittently until possibly as recent as 1962. The estimated production from Dodge Creek is 408 ounces of gold and 40 ounces of silver (Bundtzen and others, 1987). The gold was 911 fine (Metz and Hawkins, 1981).
Workings: Gold was discovered on Dodge Creek in 1915 and mining probably began in 1916 (Brooks, 1916). Mining continued intermittently until possibly as recent as 1962.
Age: Quaternary. The placer gold is probably derived from Cretaceous or Tertiary intrusive rocks (Bundtzen and others, 1987).
Production: The estimated production from Dodge Creek is 408 ounces of gold and 40 ounces of silver (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:	OP024

Other Regions, Features and Areas containing this locality

References