A gradient method for interpreting magnetic anomalies due to horizontal circular cylinders,infinite dykes and vertical steps |
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Authors: | I V Radhakrishna Murthy C Visweswara Rao G Gopala Krishna |
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Institution: | (1) Department of Geophysics, Andhra University, 530 003 Waltair |
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Abstract: | A new method of interpreting magnetic anomalies of arbitrarily-magnetised horizontal circular cylinders, dipping dykes and
vertical steps is presented. The method makes use of both horizontal and vertical gradients of the magnetic field of the model
under consideration, rather than the observed magnetic anomaly. Vertical and horizontal gradients are calculated from the
observed anomalies, and plotted one against the other to find out the locus of tip of the resultant gradient vector. This
locus is a symmetrical curve for each of the three models mentioned above. The properties of these curves are used to deduce
the various parameters of these models and the direction of magnetisation. |
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Keywords: | Gradients magnetic anomalies circular cylinder infinite dyke verticall step |
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