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Geologic interpretation of reconnaissance aeromagnetic survey of northeastern Alaska

January 1, 1994

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.

Citation Information

Publication Year 1970
Title Geologic interpretation of reconnaissance aeromagnetic survey of northeastern Alaska
DOI 10.3133/b1271F
Authors William Peters Brosge, Earl E. Brabb, Elizabeth R. King
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Bulletin
Series Number 1271
Index ID b1271F
Record Source USGS Publications Warehouse
USGS Organization Geology, Minerals, Energy, and Geophysics Science Center