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Figure 3. a - Total intensity map -- not generally useful in basement mapping. E-W flight lines are spaced one mile apart. b - Flight line residual map of same data shown in 3a. This display maps the individual basement fault blocks. c - Basement shear zones are drawn along boundaries between magnetic highs and lows, i.e. on gradients, and also along truncation lines (A-A. and B-B.). d - Fault block interpretation, with known faults superimposed and with structure contours of an oil field superimposed. Graphics courtesy of Parker Gay
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Figure 3. a - Total intensity map -- not generally useful in basement mapping. E-W flight lines are spaced one mile apart. b - Flight line residual map of same data shown in 3a. This display maps the individual basement fault blocks. c - Basement shear zones are drawn along boundaries between magnetic highs and lows, i.e. on gradients, and also along truncation lines (A-A. and B-B.). d - Fault block interpretation, with known faults superimposed and with structure contours of an oil field superimposed. Graphics courtesy of Parker Gay