Prospect, Probably inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SD
Quadrangle map, 1:63,360-scale C-5
Latitude 57.59695
Longitude -133.35434
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Mildred prospect is about 0.7 mile west-northwest of the mouth of Spruce Creek at the head of Windham Bay. It is about 0.2 mile southwest of the northeast corner of section 27, T. 49 S., R. 75 E. Figure 28 of Kimble and others (1984) is a map of the Mildred adit.

Geologic setting

Geologic description

The Mildred prospect was active between about 1895 and 1905 when a 545-foot adit was driven on the property (Spencer, 1906; Kimble and others, 1984). The adit cut a 50-foot-wide quartz stringer zone and a short quartz vein about 0.3 feet thick. The vein strikes N23W and dips 45SW. The host rock is muscovite schist of Cretaceous age (Brew and Grybeck, 1984). Kimble and others (1984) sampled the adit but most samples showed only traces of gold. Their best sample was a 5.0-foot-long chip sample that contained 0.01 part per million gold.
Geologic map unit (-133.35604815163, 57.596609244632)
Mineral deposit model Low-sulfide gold-quartz vein (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quartz veins cut Cretaceous schist.

Production and reserves

Workings or exploration The prospect was explored by a 545-foot adit driven before 1906. There has apparently been little or no work on the property since then, other than passing examinations by private industry and the government work as part of a Wilderness survey in the 1970s.
Indication of production None

Additional comments

The prospect is in the Chuck River Wilderness Area which is closed to mineral exploration and mining.


MRDS Number A013340


Redman, Earl, 1988, History of the mines and miners in the Juneau gold belt: Juneau, Alaska, privately printed, 294 p.
Reporters Donald Grybeck (U.S. Geological Survey)
Last report date 10/8/2004