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Article |
Department of Geology, University of Manchester, Manchester M13 9PL, UK
A detailed vertical gradient magnetic survey of part of a small intrusion known as the Butterton Dyke has been made with the aid of a microcomputer-based data gathering system. The results of over 16 500 magnetic measurements made by one person in less than a day have given results which reveal a detailed pattern of magnetic anomalies. From these it is possible to trace the course of two dykes for a distance of over 300 m, and identify places where they change direction and show small offsets. The advantage of making vertical gradient rather than total field magnetic measurements include a faster surveying speed and better resolution of near-surface anomalies.
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