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Surficial-Geologic Map of the Eagle A-2 Quadrangle, Fortymile mining district, Alaska

Dates

Publication Date
Start Date
1999
End Date
2001
File Modification Date
2014-05-22 11:36:00

Citation

Pinney, D.S., 200105, Surficial-Geologic Map of the Eagle A-2 Quadrangle, Fortymile mining district, Alaska: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS), http://dx.doi.org/10.14509/2671.

Summary

The Alaska Division of Geological & Geophysical Surveys (DGGS) has conducted 1:63,360-scale geologic mapping of the Eagle A-2 Quadrangle (270 square miles; equivalent to four 7.5-minute quadrangles). The area is part of the 100-year old Fortymile mining district and is located in eastern Alaska near the Alaska-Yukon border. This map illustrates the distribution of a variety of unconsolidated deposits and undifferentiated bedrock in the Eagle A-2 Quadrangle, Fortymile mining district. It was prepared by the interpretation of 1:63,360-scale, false-color, infrared aerial photographs taken from July 1978 through August 1981 and is locally verified by ground observations during field visits. The results should be considered reconnaissance [...]

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Purpose

This project, resulting map, geospatial data are intended to provide a geologic map and a geologic interpretation of the Fortymile mining district at 1:63,360 scale. Previous published 1:63,360 scale geologic maps of this area have been reconnaissance-level maps or only covered portions of the quadrangle. Mapping at 1:63,360 scale (or more detailed) is needed to identify critical geologic features that may relate to more regional structures or geologic units. These detailed observations are also critical to test or use in tectonic models. This map also provides a geologic base in which to interpret geochemical results from the concurrent DGGS rock sampling program.

Additional Information

Identifiers

Type Scheme Key
processingUrl http://www.dggs.alaska.gov/metadata/PIR2001-3C.xml

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