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Maps showing aeromagnetic survey and geologic interpretation of the Chignik and Sutwik Island quadrangles, Alaska

Miscellaneous Field Studies Map 1053-B
By: , , , , and 
https://doi.org/10.3133/mf1053B

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Abstract

An aeromagnetic survey over part of the Chignik and Sutwik Island quadrangles, on the southern Alaska Peninsula, was flown in 1977 as part of the Alaska mineral resource assessment program (AMRAP). Maps at scales 1:250,000 and 1:63,360 have been released on open-file (U.s. Geological Survey, 1978a, 1978b). This report includes the aeromagnetic map superimposed on the topographic base (sheet 1) and an interpretation map superimposed on the topographic and simplified geologic base (sheet 2). This discussion provides an interpretation of the aeromagnetic data with respect to regional geology, occurrence of ore deposits and prospects, and potential oil and gas resources. The survey was flown along northwest-southeast lines, spaced about 1.6 km apart, at a nominal elevation of about 300 m above the land surface. A proton-precession magnetometer was used for the survey, and the resulting digital data were computer contoured at intervals of 10 and 50 gammas (sheet 1). The International Geomagnetic Reference Field (IGRF) of 1965, updated to 1977, was removed from the total field data.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Maps showing aeromagnetic survey and geologic interpretation of the Chignik and Sutwik Island quadrangles, Alaska
Series title Miscellaneous Field Studies Map
Series number 1053
Chapter B
DOI 10.3133/mf1053B
Year Published 1981
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Description Report; 8 p.; 2 maps: 45 x 115 cm.
Country United States
State Alaska
Other Geospatial Chignik Island, Sutwik Island
Scale 250000
Online Only (Y/N) N
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
Additional publication details