Unnamed (upper Little Eldorado Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Hg
Ore minerals iron oxide
Gangue minerals sericite

Geographic location

Quadrangle map, 1:250,000-scale ID
Quadrangle map, 1:63,360-scale A-4
Latitude 62.18164
Longitude -157.92794
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 1,100 feet on top of a small ridge that separates the two headwater tributaries of Little Eldorado Creek. The occurrence is about 1.2 mile south of hill 1132 and 0.3 mile southeast of the center of section 8, T. 24 N., R. 47 W., of the Seward Meridian. The location is accurate.

Geologic setting

Geologic description

This occurrence consists of an iron stained, sericitized zone in a granite porphyry plug which intrudes sandstone of the Upper Cretaceous, Kuskokwim Group (Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). The altered zone is of uncertain size and orientation. One sample of mineralization contained 50 parts per billion (ppb) gold and 1,300 ppb mercury (McGimsey and others, 1988).
Geologic map unit (-157.930347599383, 62.1809507409016)
Alteration of deposit Sericitic alteration of granite porphyry; iron oxide staining.

Production and reserves

Workings or exploration Samples were collected by the U.S. Geological Survey and Alaska Division of Geological and Geophysical Surveys in 1986 (McGimsey and others, 1988).
Indication of production None