Unnamed (north of upper Crumb Gulch)

Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Au; Sb
Ore minerals chalcopyrite; gold; pyrite; realgar; stibnite

Geographic location

Quadrangle map, 1:250,000-scale MC
Quadrangle map, 1:63,360-scale B-5
Latitude 61.3508
Longitude -142.5254
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is on the west side of Williams Peak and north of the head of Crumb Gulch (MacKevett, 1974). The site is at an elevation of about 6,000 feet, about 400 feet west of elevation 6280 in the NW1/4 of section 15, T. 6 S., R. 16 E. of the Copper River Meridian. This is locality 56 of MacKevett (1976); the location is accurate to within a few hundred feet.

Geologic setting

Geologic description

The deposit at this prospect consists of veins that contain gold, stibnite, realgar, chalcopyrite, and pyrite; the veins are up to 1 foot thick along shear zones that cut hornfels adjacent to Tertiary granodiorite (MacKevett and Smith, 1968; MacKevett, 1974, 1976). Samples contain as much as 15 parts per million (ppm) silver, 66 ppm gold, and more than 10,000 ppm antimony (MacKevett and Smith, 1968, samples 13-16). A few veins in the granodiorite contain masses of stibnite more than 3 feet long and as much as 1 foot wide. The deposits were explored by two short adits and surface workings.
Geologic map unit (-142.527450993956, 61.3503689538584)
Mineral deposit model Vein
Age of mineralization Tertiary; the mineralization is in the contact zone of Tertiary granodiorite (MacKevett, 1974).

Production and reserves

Workings or exploration The deposits were explored by two short adits and surface workings.
Indication of production None

Additional comments

The locality is in the Wrangell-Saint Elias National Park and Preserve.

References