Rocky Mountain Creek

Mine, Inactive

Commodities and mineralogy

Main commodities Au; Sn; W
Ore minerals cassiterite; gold; scheelite

Geographic location

Quadrangle map, 1:250,000-scale NM
Quadrangle map, 1:63,360-scale D-1
Latitude 64.7702
Longitude -165.2037
Nearby scientific data Find additional scientific data near this location
Location and accuracy Rocky Mountain Creek is an east tributary to upper Nome River. It is about 2 miles south of Christian Creek (NM073). Tailings extend about one-half mile along Rocky Mountain Creek, beginning just east of the Nome-Taylor road. The location is accurate; the coordinates are the mid-point of the placer tailings. The mine is locality 108 of Cobb (1972 [MF 463], 1978 [OFR 78-93]).

Geologic setting

Geologic description

The lower part of Rocky Mountain Creek was placer mined for gold, probably after WW II. The area was actively prospected for tungsten and other strategic metals during World War II (Coats, 1944), and native gold and small amounts of cassiterite were present with scheelite in heavy mineral concentrates. Rocky Mountain Creek was one of three creeks in the Nome area identified by Anderson (1947) as having notable amounts of cassiterite. Anderson (1947) inferred that the placer cassiterite was derived from the same veins that hosted scheelite. Lode occurrences identified above the placer mine in the Rocky Mountain Creek drainage include the Lindfors (NM080) and Spring (NM078) antimony prospects and the Thomson (NM077) antimony and zinc prospect identified by Hummel (1962 [MF 248]). Coats (1944) reported a narrow vein, mostly composed of quartz and albite but also with about 3 percent scheelite, in Rocky Mountain Creek above the placer. This scheelite occurrence may be locality 34 of Hummel (1962 [MF 248]) near the head of the creek (NM076). Bedrock in the Rocky Mountain Creek drainage is a metasedimentary schist and marble sequence (Hummel, 1962 [MF 248]).
Geologic map unit (-165.206318950143, 64.7694423510178)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Holocene.

Production and reserves

Workings or exploration Rocky Mountain Creek was worked as a placer mine on a small scale relatively late in the history of the district. It is not mentioned as a placer prospect in reports earlier than World War II.
Indication of production Yes; small