Malemute Gulch Mine and prospect (Pup), Iditarod Mining District, Yukon-Koyukuk Census Area, Alaska, USAi

Regional Level Types
Malemute Gulch Mine and prospect (Pup)	Prospect
Iditarod Mining District	Mining District
Yukon-Koyukuk Census Area	Census Area
Alaska	State
USA	Country

Location: The Malemute Gulch Mine and prospect are on the north side of Otter Creek about 1 mile northeast of Discovery camp. The mouth of the gulch is at an elevation of 400 feet in the SE1/4 section 1, T. 27 N., R. 47 W., of the Seward Meridian. Malemute Gulch or Pup is locality 32 of Cobb (1972 [MF 363]); also described in Cobb (1976 [OFR 76-576]).
Geology: This record includes both a lode and a placer deposit in what is locally called Malemute Gulch. The lode deposit consists of a N15-25E, steeply dipping quartz-calcite-sulfide vein that contains arsenopyrite, cinnabar, and a considerable amount of gold (Mertie, 1936; Bundtzen and others, 1992; Miller, Bundtzen, and Gray, 2005). A 70-foot drift, now caved, explored the deposit. Mertie (1936) first suggested that the Malemute Gulch lode is on the projection of the Golden Horn veins (ID115) exposed about 0.6 mile to the southwest. A formerly productive, residual placer deposit overlies the lode. The gold fineness in the placer averages 832 (Bundtzen, Cox, and Veach, 1987; Smith, 1941 [B 910]). The placer concentrates contained scheelite, chromite, ferberite, realgar, cinnabar, allanite, zircon, and cassiterite. From 1912 to 1952, the placer produced 1,907 ounces of gold and 241 ounces of silver (Miller, Bundtzen, and Gray, 2005). The placer concentrates contained up to 1.80 percent W03, 500 parts per million antimony, and 1.76 percent mercury as cinnabar (Maloney, 1962).
Workings: A 70-foot drift, now caved, explored the lode deposit. The overlying placer deposit was intermittently mined by open-cut mining methods from 1912 to 1952. It is not clear where the caved adit is in respect to the placer deposit. Mertie (1936) indicated a lode prospect '100 yds' below Malemute Gulch. Maloney (1962) stated that the caved adit was 400 feet west of the gulch. A caved adit that T.K. Bundtzen visited was within the area that was placer mined.
Age: The placer deposit is probably Quaternary. The lode deposit may be 63.0 Ma by analogy with the Golden Horn Mine (ID115).
Production: From 1912 to 1952, the placer produced 1,907 ounces of gold and 241 ounces of silver (Miller, Bundtzen, and Gray, 2005). The placer concentrates contained up to 1.80 percent W03, 500 parts per million antimony, and 1.76 percent mercury as cinnabar (Maloney, 1962).

Commodities (Major) - Au; (Minor) - As, Hg
Development Status: Yes
Deposit Model: Polymetallic vein or Porphyry Au-Cu for the lode; also a placer gold deposit (C

Other Databases

Link to USGS - Alaska:	ID118

Other Regions, Features and Areas containing this locality

References