Abstract
The results of field studies show that occasionally the curves obtained in sounding with a transient magnetic field (the ZS method) are distorted in character. These distortions are most severe in the left-hand segments of the curves, and may substantially increase or decrease the value of ρτ computed for small times. In extreme cases, the value for ρτ computed for the left-most segment of the transient coupling curve may be negative (this part of the transient is opposite in polarity to the excitation pulse). Examples of such distorted curves are shown in Fig. 1. These distorted curves obviously cannot be matched well with theoretical ZS curves computed for sequences of horizontal layers. In a number of cases it has not been possible to recognize the presence of such distortions merely from the form of the curves (for example, curve ZS-81 in Fig. 2), but such curves differ significantly from the type curves established for a particular area (as for example, curve ZS-84 in Fig. 2), permitting distortions to be recognized.
This paper appeared originally in Prikladnaya Geofizika, No. 41, pp. 86–94 (1965).
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
A. I. Zaborovskii, Electrical Prospecting. Gostoptekhizdat (1963).
L. L. Vanyan, “Some Questions on the Theory of Frequency Sounding over Horizontal Layers,” Prikl. Geofiz., No. 23 (1958).
L. L. Vanyan, “Elements of the Theory for Transient Electromagnetic Fields,” Prikl. Geofiz., No. 25 (1947).
S. M. Sheinman, “On Transient Electromagnetic Fields in the Earth,” Prikl. Geofiz., No. 3 (1947).
I. M. Ryshik and I. S. Gradshtein, Tables of Sums, Products, and Integrals, Plenum Press, New York (1963).
L. Z. Bobrovnikov, L. L. Vanyan, Yu. S. Korol’kov, A. P. Pryakhin, and E.I. Terekhin, Utilization in Electrical Exploration of the Transient Field Method for Solving Problems in Structural Geology. Files of VNII Geofiziki (1960).
Rights and permissions
Copyright information
© 1967 Consultants Bureau
About this chapter
Cite this chapter
Vanyan, L.L., Davidov, V.M., Terekhin, E.I. (1967). Concerning Some Causes for the Distortion of Transient Sounding Curves. In: Electromagnetic Depth Soundings. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-0670-2_4
Download citation
DOI: https://doi.org/10.1007/978-1-4684-0670-2_4
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4684-0672-6
Online ISBN: 978-1-4684-0670-2
eBook Packages: Springer Book Archive