Geoelectrical structure of Jeju Island deduced from 2D inversion of AMT and MT data

  • Choi, Ji-Hyang (Dept. of Civil, Urban and Geosystem Eng., Seoul National University) ;
  • Kim, Hee-Joon (Dept. of Environmental Exploration Eng., Pukyong National University) ;
  • Nam, Myung-Jin (Dept. of Petrleum and Geosystems Eng., The University of Texas at Austin) ;
  • Lee, Tae-Jong (Groundwater & Geothermal Resources Div., KIGAM) ;
  • Lee, Seong-Kon (Groundwater & Geothermal Resources Div., KIGAM) ;
  • Song, Yoon-Ho (Groundwater & Geothermal Resources Div., KIGAM) ;
  • Suh, Jung-Hee (Deceased, Formerly Dept. of Civil, Urban and Geosystem Eng., Seoul National University)
  • Published : 2007.06.07

Abstract

Two-dimensional (2D) interpretation of MT and AMT data observed in 2004 in Jeju Island is made using two inversion schemes developed by Uchida (1993) and Lee et al. (2002). These interpretations show that the subsurface of Jeju consists of roughly three layers. Reconstructed images along lines E and W reveal that the conductive layer beneath the topmost resistive layer of lava plateau can be a sediment layer. The geoelectrical structure along line E is more complex than that along line W, especially near Mt. Halla. The Uchida’s (1993) scheme gives reasonable images, but much more time-consuming than that of Lee et al. (2002).

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