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http://dx.doi.org/10.5467/JKESS.2009.30.2.153

1-D Deep Resistivity Structure of the Korean Peninsula Using Magnetotelluric(MT) Data  

Yang, Jun-Mo (Deep Sea and marine Resource Research Division, KORDI)
Lee, Heui-Soon (Department of Science Education, Gyeongin National University of Education)
Lee, Chun-Ki (Planetary Geodynamics Laboratory, NASA Goddard Space Flight Center)
Kwon, Byung-Doo (Department of Earth Science Education, Seoul National University)
Publication Information
Journal of the Korean earth science society / v.30, no.2, 2009 , pp. 153-164 More about this Journal
Abstract
We examined the regional 1-D deep resistivity structure of the Korean Peninsula using MT data acquired at seven sites located in the Kyongsang Basin and Kyonggi Massif. At the sites located in the Kyongsang Basin, surrounding sea distorts observed MT response and hence this distortion, so called "sea effect", is corrected using an iterative tensor stripping method. The 1-D layered inversion results for the seven MT sites reveal 4 layered structure, which is composed of 1) near surface layer, 2) upper crust, 3) lower crust and upper mantle, and 4) asthenosphere from the surface downward. Conrad interface, which is a boundary between upper and lower crust, is distinctly identified beneath all the MT sites. Conrad interface depth is estimated to about be 17km in the Kyongsang Basin and about 12km in the Kyonggi Massif, while the upper crust of the Kyongsang Basin is about 5 times more resistive than that of the Kyonggi Massif. Finally, asthenosphere is inferred to exist below a depth of approximately 100km with a resistivity of 200-300 ohm-m.
Keywords
magnetotelluric; sea effect; 1-D resistivity structure; Conrad interface; asthenosphere;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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