Details of the Abstract
| Title of paper | Deep resistivity structure in the central and northern parts of the Tibetan Plateau revealed by two-dimension magnetotelluric focused inversion |
| List of authors | Author Zuwei Huang, Co-Author Peng Yu, Co-Author Luolei Zhang ,Co-Author Chongjin Zhao,Co-Author Han Song, Co-Author Xiaofei Guan |
| Affiliation(s) | State Key Laboratory of Marine Geology, Tongji University, Shanghai, China.; State Key Laboratory of Marine Geology, Tongji University, Shanghai, China.; State Key Laboratory of Marine Geology, Tongji University, Shanghai, China.; State Key Laboratory of Marine Geology, Tongji University, Shanghai, China.; State Key Laboratory of Marine Geology, Tongji University, Shanghai, China.; School of Mathematical Science, Tongji University, Shanghai, China. |
| Summary | Tibetan plateau is a key area for understanding the rheology and tectonic evolution of continental plates, and exploring the dynamic processes of the continent, magnetotelluric (MT) plays an important role in researching geological structures at the scale of the lithosphere. In our study, we collect MT data in broadband period ranges (T=0.003s to 3000) to reveal the lithospheric structures of Tibetan plateau. The inversion method is based on the focused 2D MT inversion with both transverse electric (TE) and transverse magnetic (TM) mode, we design a synthetic model experiment refer to the actual geological model of the Tibet Plateau to explain the importance of using both TE and TM mode and the controlling of the regularization parameter, through our designed inversion strategy we have successfully restored the true model which shows more accurate and stable in inversion result compared to the conventional inversion processing. We conducted our inversion strategy on a survey line running east-west through the central part of the Tibet Plateau at a distance of about 1300km, inversion result clearly shows a significant lateral variation in the thickness of the lithosphere related to the subduction and collision, continuous distribution of high conductivity layers in the middle and lower crust indicates that the presence of a large amount of partially molten and water rich fluids. |
| Session Keyword | 2.0 EM theory, modelling and Inversion |
| File upload |
2.0_deep_resistivity_structur_huang_01.pdf
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