In a paper read at the 25th International Geological Congress, Sydney, 1976 Stanley described a simplified method for interpreting gravity anomalies due to contact and dyke-like structures. The method involved the assumptions of considerable depth extent relative to thickness of overburden, infinite strike length, and in the case of a dyke, a depth of burial much greater than the width. In real situations these assumptions may not always be justified. We now evaluate the limits to which the approximations may be extended before unsatisfactory errors are introduced to the interpreted structural parameters.
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