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Geologic interpretation of reconnaissance aeromagnetic survey of northeastern Alaska

Bulletin 1271-F

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Abstract

Aeromagnetic reconnaissance of northeastern Alaska in 1965 covered approximately 100,000 square miles, from lat 64° N. to the Arctic Ocean and from the Alaska-Yukon boundary to long 148°30' W. A magnetic contour map was compiled from data from the 1965 survey and earlier surveys. On the basis of these data, northeastern Alaska may be divided into five areas, each having a distinct magnetic character. A study of specific anomalies within these areas led to the tracing of such features as the Tintina fault zone, Ruby uplift, and Kobuk trench for more than 100 miles. Other features, such as inferred north-trending faults and serpentine belts, had not been identified previously by surface geologic methods. The probable extension of volcanic rocks beneath the Yukon Flats limits the size of a possible Tertiary petroleum basin. Discovery of large magnetic anomalies in the Yukon-Tanana Upland provides new possibilities for exploration for mineral deposits associated with ultramafic rocks.

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Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Geologic interpretation of reconnaissance aeromagnetic survey of northeastern Alaska
Series title:
Bulletin
Series number:
1271
Chapter:
F
Year Published:
1970
Language:
English
Publisher:
U.S. Government Printing Office
Description:
Report: 14 p.; 4 plates: 43.24 x 35.31 inches or smaller
Country:
United States
State:
Alaska