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Title of paper Revisit of the mantle electrical structure beneath the Tristan da Cuna hotspot by using a 3-D inversion based on non-conforming deformed hexahedral mesh
List of authors "Singh, R.K., Baba, K., Usui, Y., Grayver, A., Jegen, M., Morschhauser, A., Geissler, W.,
Matzka, J., Haroon, A., Kuvshinov, A."
Affiliation(s) ERI, The University of Tokyo, ERI, The University of Tokyo, ERI, The University of Tokyo, ETH, Zürich, GEOMAR, Helmholtz Centre of Ocean Research Kiel, GFZ, Potsdam, AWI, Helmholtz Centre for Polar and Marine Research, GFZ, Potsdam, GEOMAR, Helmholtz Centre of Ocean Research Kiel, ETH, Zürich
Summary I have analyzed the marine magnetotelluric data from Tristan da Cunha to understand the trend of apparent resistivity, phase, and vertical magnetic function data. I created a non-conforming hexahedral mesh of various dimensions and prepared the dataset for 3D inversion for various settings of the error floor. I performed several 3-D inversions to obtain the optimum values of inversion parameters. For inversion analysis, I calculated the topographic responses using Usui (2021) and compared them with the responses from Grayver (2015) and forward responses from the method used in Baba et al. (2017). I compared the responses for all the sites from the three methods and established any correlation of the responses with respect to the topography effects on the sites. Subsequently, I performed the 3D inversion of marine MT data from the study area to image the electric structure of the present study area.
Session Keyword 5.0 Marine EM
File upload 5.0_revisit_of_the_mantle_ele_singh.pdf
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