Efficiency of a Marine Towed Electrical Resistivity Method

  • Author(s): Chih-Wen Chiang, Tada-nori Goto, Chien-Chih Chen, and Shu-Kun Hsu
  • DOI: 10.3319/TAO.2011.02.16.01(T)
  • Keywords: Marine towed electrical resistivity, DC resistivity survey, Sulfide deposits, Methane hydrates, Forward modeling
  • Citation: Chiang, C. W., T. Goto, C. C. Chen, and S. K. Hsu, 2011: Efficiency of a marine towed electrical resistivity method. Terr. Atmos. Ocean. Sci., 22, 443-446, doi: 10.3319/TAO.2011.02.16.01(T)
Abstract

In contrast to marine sediments, because of large electrical resistivity anomalies found in sulfide deposits and methane hydrates, resistivity measurements such as marine towed electrical resistivity (MTER) might be a feasible method for discovering those natural minerals. To determine the feasibility of the MTER method we examined arrays consisting of a pole electrical dipole (PED), vertical electrical dipole (VED) and horizontal electrical dipole (HED). The VED array showed a maximum difference in electric fields of 36 % and 105 % in the resistive and conductive models, respectively, while the PED and HED arrays yielded worse results of around 13 % to 19 %, respectively. The VED array showed a higher difference in electric fields than both the HED and PED arrays in the two models. Therefore, we suggest that a VED array with a large electrical current would be most conducive leading to the discovery of such minerals during MTER surveys.

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