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http://dx.doi.org/10.7582/GGE.2014.17.1.021

Response Analysis of Data Acquired by Marine Loop Electromagnetic System Using Three-Dimensional Modeling Based on Integral Equation  

Ko, Hwicheol (Korea Resources Corporation (KORES))
Park, In Hwa (Geothermal Resources Department, KIGAM (Korea Institute of Geoscience And Mineral Resources))
Lee, Seong Kon (Geothermal Resources Department, KIGAM (Korea Institute of Geoscience And Mineral Resources))
Publication Information
Geophysics and Geophysical Exploration / v.17, no.1, 2014 , pp. 21-27 More about this Journal
Abstract
We analyzed response patterns of test field data acquired with new small loop electromagnetic (EM) system using three-dimensional (3D) electromagnetic modeling code. The size and shape of a conductor was adopted as experimental parameters for EM modeling to understand influencing factors of the response patterns due to a metallic object on the seafloor. Obtaining the responses for four models of difference sizes and shapes through 3D EM modeling, we confirmed that the shape of the object have a more critical factor on the response pattern than size. We also calculated "ppm" values with respect to different altitudes of the sensor and source frequencies. The modeling results show that the consistency of sensor altitude is important and imaginary part of ppm response is more sensitive than real part. We also visualized the contour map of the real and imaginary part of ppm value as a function of frequency and altitude so that we can estimate proper altitude for source frequency band of our survey system. The results of this paper are anticipated to give proper parameters in survey construction for seafloor massive sulfide deposit.
Keywords
small-loop electromagnetic survey; three-dimensional modeling; electromagnetic response pattern; frequency; altitude;
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Times Cited By KSCI : 4  (Citation Analysis)
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