IV. SURVEY RESULTS AND ANALYSES 



As a result of this survey, the geomagnetic field and the 

 bathymetry of a 56,000 square mile area of the Pacific Ocean 

 have been charted in detail. The magnetic total intensity con- 

 tours are shown in Figure 3, and tne bathymetric contours in 

 Figure 4. 



The most significant of the magnetic features present is 

 the northeast-southwest trending anomaly extending approximately 

 270 miles across the entire area. This feature trends along a 

 very straight line having a strike of approximately North 75° 

 East. It varies in width from approximately 15 to 45 miles, 

 and it becomes more complex in its northeastern extremities. 



Profiles A-A' through F-F' (Figures 7-12) were constructed 

 perpendicular to this northeast-southwest feature, (See Figures 

 3 and 4 for profile locations.) These profiles, as well as the 

 contour charts, show that a bathymetric feature of small relief 

 parallels the magnetic anomaly. This bathymetric feature be- 

 comes more pronounced to the southwest, where there is a maxi- 

 mum relief of approximately 1200 feet. 



Using empirical slope techniques, estimates of the depth 

 to the top of the magnetic source were made on each of the con- 

 structed magnetic profiles. These calculations, as shovm in 

 Figure 13, indicate a deepening of the magnetic source to the 

 northeast. 



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