| Scalar magnetic anomaly maps over the Antarctica derived from MAG-SAT (1979) contain ionospheric current signatures to an unknown degree. The presence of such pollution in previously published maps has been identified in this study. Detailed analyses of ;To avoid the uncertainty in how the currents alter the crustal anomaly patterns, a new technique for satellite magnetic analysis is developed. It records the geographic locations of every peak and trough along a magnetic profile onto a map of the studying area. The congregations of these peaks and troughs will then form images of the regional tectonic/geologic features. Linear features, such as fracture zones and spreading zones, are most clearly presented. Large faults are also inferred from a shift in the distributions of peaks and troughs. The results correlate with the geology known in the Antarctic region exceptionally well. Some major features shown in the results are completely covered by ice and the geology there is practically unknown. Future field work on the Antarctic continent may provide more information.;Satellite magnetic surveys will always face the problems of current interferences. Although it may not be possible to remove these noises, this study shows that it is possible to isolate them and reduce their influences. |
