A MODIFIED PSEUDOSECTION FOR RESISTIVITY AND IP PDF

Dipole--dipole induced-polarization measurements are commonly presented as pseudosections, but results using different dipole lengths cannot be combined into a single pseudosection. By considering the theoretical results for simple earth models, a unique set of relative depth coefficients is empirically derived, such that measurements with different array parameters will ''mesh'' smoothly into a combined pseudosection. Application of these coefficients to a number of theoretical and field cases shows that they give reasonable results when applied to more complicated models. The empirical coefficients are compared with Roy's theory of ''depth of investigation characteristic,'' and support that theory, if a modified definition of ''effective depth'' is accepted.

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Dipole--dipole induced-polarization measurements are commonly presented as pseudosections, but results using different dipole lengths cannot be combined into a single pseudosection. By considering the theoretical results for simple earth models, a unique set of relative depth coefficients is empirically derived, such that measurements with different array parameters will ''mesh'' smoothly into a combined pseudosection.

Application of these coefficients to a number of theoretical and field cases shows that they give reasonable results when applied to more complicated models. The empirical coefficients are compared with Roy's theory of ''depth of investigation characteristic,'' and support that theory, if a modified definition of ''effective depth'' is accepted.

This leads to an absolute depth scale for the modified pseudosection. It is shown that rough estimates of the depth to the top of an anomalous body can be made directly on the pseudosection, at true vertical scale. This definition of effective depth is applied to other electrode arrays. It is shown, by examples, that the resulting pseudosections give consistent estimates of depth to top, within the characteristic anomaly patterns of each array.

The effective depths for various arrays are compared; the results agree with the traditional applications of each array. Similar records in OSTI.

GOV collections:. Title: Modified pseudosection for resistivity and IP. Full Record Other Related Research. Abstract Dipole--dipole induced-polarization measurements are commonly presented as pseudosections, but results using different dipole lengths cannot be combined into a single pseudosection. Edwards, L S. Modified pseudosection for resistivity and IP.

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A modified pseudosection for resistivity and IP

Edwards; A modified pseudosection for resistivity and IP. Geophysics ; 42 5 : — Dipole-dipole induced-polarization measurements are commonly presented as pseudosections, but results using different dipole lengths cannot be combined into a single pseudosection. By considering the theoretical results for simple earth models, a unique set of relative depth coefficients is empirically derived, such that measurements with different array parameters will 'mesh' smoothly into a combined pseudosection. Application of these coefficients to a number of theoretical and field cases shows that they give reasonable results when applied to more complicated models.

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A MODIFIED PSEUDOSECTION FOR RESISTIVITY AND IP

We'd like to understand how you use our websites in order to improve them. Register your interest. Following the depths of investigation of different electrode arrays, given by Roy and Apparao and Roy , a modified pseudo-depth section was suggested for any array by Apparao and Sarma as a tool in resistivity and IP prospecting. The tool was used for the interpretation of IP and resistivity anomalies obtained in a virgin area—Jonnagiri village, Pattikonda Taluq, Kurnool district A. Two of the four bore holes recommended encountered sulphide mineralization, while the other two met with white altered ashy material at the position of the maximum anomaly contour in the depth sections.

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