General Approach

Often calls for the remedial involvement of potential field methods - gravity and magnetic methods in particular and their involvement in the interpretation process to not only assures a greater uniformity of interpretation coverage, but it is also important in locating features that are seismically less easy to recognize such as strike-slip faults, regional discontinuities, dykes, and true basement surface.

There are 2 aspects to gravity and magnetic interpretation - qualitative and quantitative. The qualitative element is largely map-based and dominates the early and late stages of a study. The preliminary structural element map that results from this can be regarded as the cornerstone of the interpretation. Qualitative interpretation involves recognition of:

1. The nature of discrete anomalous bodies including intrusions, faults and lenticular intra-sedimentary bodies - often aided by the running of simple test models;
2. Disruptive cross-cutting features such as strike-slip faults;
3. Effects of mutual interference between anomalies that are vertically or horizontally adjacent;
4. Age relationships of intersecting faults;
5. Structural styles;
6. Unifying tectonic features/events that integrate seemingly unrelated interpreted features; and
7. Delineate depth to different wavelength anomalies.

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