J. L. Meuschke
L.R. Alldredge
Fred Keller Jr.
1954
<p><span>Total‐intensity </span>aeromagnetic<span> </span>surveys<span> of the </span>Aleutian<span> </span>Marshall<span>, and </span>Bermuda<span> </span>Islands<span> were completed </span>in<span> 1948. The anomalies associated with the </span>Aleutian<span> volcanoes are attributed mainly to topographic relief and are not an indication of the degree of volcanic activity. Eniwetok presents a magnetic pattern that would be produced by an irregular‐shaped rimmed depression </span>in<span> the basement, modified by the two adjoining seamounts, and differs from Bikini, whose magnetic features would be produced by a broad seamount with irregular surface relief. The </span>Bermuda<span> </span>survey<span> demonstrated magnetic features typical of volcanic rocks. Comparison of an observed and a theoretical profile computed by Press and Ewing indicates that their assumptions are reasonably correct. The </span>Aleutian<span> Trench </span>survey<span> shows anomalies that are attributed to susceptibility contrasts but none that can be correlated with the trench. A traverse from Adak, </span>Aleutian<span> </span>Islands<span>, to Kwajalein, </span>Marshall<span> </span>Islands<span>, exhibited several large anomalies that are presumed to be caused by susceptibility contrasts but may be indications of uncharted seamounts. Two traverses, one from Cape May, N.J., to </span>Bermuda<span> and the other from </span>Bermuda<span> to Long </span>Island<span>, N.Y., reveal a change </span>in<span> the magnetic field approximately 300 miles from the Atlantic Coast that indicates a possible thinning of the sial and an exposure of sima.</span></p>
application/pdf
10.1029/TR035i004p00558
en
American Geophysical Union
Aeromagnetic surveys in the Aleutian, Marshall, and Bermuda Islands
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