Details of the Abstract
| Title of paper | Dimensional Insights of Subsurface Structures along Eastern Ghats Mobile Belt, India: Mohr Circle Analysis in Magnetotellurics |
| List of authors | "Yadav, A., Agrahari, S., Prakash, N." |
| Affiliation(s) | Indian Institute of Technology Kharagpur, Kharagpur West Bengal |
| Summary | The use of the Mohr Circle, traditionally employed in mechanical stress analysis, has been adapted in Magnetotellurics (MT) to interpret impedance tensors. Unlike stress tensors, which are real, impedance tensors are complex, necessitating two Mohr circles—one for the real component and one for the imaginary component. These circles reveal distinctions such as 2D, 3D, anisotropy, skewness, and distortion within the impedance tensor. To investigate subsurface dimensionality using Mohr circle principles, a ~74 km profile running predominantly north-south was traced in the southern EGMB region, covering the Mahanadi and Angul-Dhenkanal shear zones. This study presents Mohr circle responses and property values from two MT stations near these shear zones. At higher frequencies, both sites show circles near the abscissa, indicating two-dimensional characteristics at shallow depths. In contrast, lower frequencies reveal circles deviating from the abscissa or intersecting the vertical axis, indicating three-dimensional features, anisotropy, or 2D distortion. Property values at both sites further clarify the 2D and 3D characteristics of the subsurface structure. |
| Session Keyword | 1.0 Instrumentation, data acquisition and processing |
| File upload |
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