Conglomerate Creek

Occurrence, Probably inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold; magnetite; pyrite

Geographic location

Quadrangle map, 1:250,000-scale WI
Quadrangle map, 1:63,360-scale B-2
Latitude 67.4846
Longitude -150.6758
Nearby scientific data Find additional scientific data near this location
Location and accuracy Conglomerate Creek is a southeast-flowing tributary to Glacier River. Its mouth is approximately 2 miles east of Delay Pass and 5.5 miles northwest of Bluecloud Mountain. There is little information to locate this placer occurrence along Conglomerate Creek and the site is arbitrarily plotted about 0.2 mile east of the center of section 28, T. 31 N., R. 14 W., of the Fairbanks Meridian, based on the location shown in Dillon (1982).

Geologic setting

Geologic description

Although he did not visit Conglomerate Creek, Reed (1938) reported that very good prospects were found on it in the early 1900s. Bliss and others (1988) indicated that there was some activity in the 1980s. The mining is s hampered by large conglomerate boulders in the creek. Mosier and Lewis (1986) analyzed six samples of yellow gold from Conglomerate Creek. Panned samples collected by Kurtak and others (1999) contained no visible gold although one sample contained 250 ppb gold. Only one pan contained any metallic minerals, chiefly traces of magnetite and some pyrite.
Geologic map unit (-150.678552392582, 67.4841651761214)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a)
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration Reed (1938) noted reports of mining on this creek, and Bliss and others (1988) indicated that there was some activity in the 1980s.
Indication of production Undetermined

Additional comments

Bureau of Land Management lists the locality as Cinco Mining (U. S. Bureau of Mines, 1998; Kurtak and others, 1999).