Open AccessThe Modeling of 2D Controlled Source Audio Magnetotelluric (Csamt) Responses Using Finite Element Method
Author(s) -
Imran Hilman Mohammad,
Wahyu Srigutomo,
Doddy Sutarno,
Prihadi Sumintadireja
Publication year - 2012
Publication title -
journal of electromagnetic analysis and applications
Language(s) - English
Resource type - Journals
eISSN - 1942-0749
pISSN - 1942-0730
DOI - 10.4236/jemaa.2012.47041
Subject(s) - magnetotellurics , helmholtz equation , finite element method , geology , electrical conductor , dipole , electric field , homogeneous , geophysics , electromagnetic field , field (mathematics) , helmholtz free energy , mathematical analysis , physics , mathematics , statistical physics , electrical resistivity and conductivity , quantum mechanics , pure mathematics , thermodynamics , boundary value problem
This paper presents the modeling of 2D CSAMT responses generated by horizontal electric dipole using the separation of primary and secondary field technique. The primary field is calculated using 1D analytical solution for homogeneous earth and it is used to calculate the secondary electric field in the inhomogeneous Helmholtz Equation. Calculation of Helmholtz Equation is carried out using the finite element method. Validation of this modeling is conducted by comparison of numerical results with 1D analytical response for the case of homogeneous and layered earth. The comparison of CSAMT responses are also provided for 2D cases of vertical contact and anomalous conductive body with the 2D magnetotelluric (MT) responses. The results of this study are expected to provide better interpretation of the 2D CSAMT data