3-D magnetotelluric inversion reveals the superposition of tectonic systems in 
the northern Songliao Block, NE China

Wang, Tianqi; Han, Jiangtao; Comeau, Matthew J.; Becken, Michael; Zhou, Zikun

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3-D magnetotelluric inversion reveals the superposition of tectonic systems in the northern Songliao Block, NE China

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Wang, Tianqi
29. Kolloquium, 2021, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations;
College of Geoexploration Science and Technology, Jilin University, Changchun, China;

Han, Jiangtao
29. Kolloquium, 2021, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations;
College of Geoexploration Science and Technology, Jilin University, Changchun, China;
Key Laboratory of Applied Geophysics, Changchun, China;

Comeau, Matthew J.
29. Kolloquium, 2021, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations;
Institut für Geophysik, Universität Münster, Münster, Germany;

Becken, Michael
29. Kolloquium, 2021, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations;
Institut für Geophysik, Universität Münster, Münster, Germany;

Zhou, Zikun
29. Kolloquium, 2021, Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung EMTF, External Organizations;
College of Geoexploration Science and Technology, Jilin University, Changchun, China;

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https://gfzpublic.gfz-potsdam.de/pubman/item/item_5010006
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EMTF_2021_virtuell_02_Wang.pdf
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Zitation

Wang, T., Han, J., Comeau, M. J., Becken, M., Zhou, Z. (2022): 3-D magnetotelluric inversion reveals the superposition of tectonic systems in the northern Songliao Block, NE China. - In: Börner, J., Yogeshwar, P., Grinat, M. (Eds.), - Protokoll über das 29. Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung: virtuell, 29. September - 1. Oktober 2021, 29. Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung (virtuell 2021), 11-17.

Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5010117

Zusammenfassung

The Songliao Block is located in the eastern part of the Central Asian Orogenic Belt. Its creation and evolution are believed to be related to the closure of the Paleo-Asian and Mongol-Okhotsk oceans, and to the subduction of the Paleo-Pacific Ocean. The deep seismic reflection profiles showed that there are sloping mantle reflections below the Songliao Block, which are suspected to be the result of the convergence of three tectonic domains. However, it is still not clear the current structural form of the Songliao Block is caused by the direct action or not of the tectonic systems. This work used 138 broadband magnetotelluric stations to obtain a three-dimensional electrical structural model of the northern Songliao Block. The results showed there are orthogonal network fault systems, faulted basins, igneous rocks. And the Lindian fault depression is the center of the asthenospheric upwelling, the shallowest up to 45 km. Combined with evidence from seismic studies, we proposed that the superposition of tectonic systems may have produced weak tectonic zones. These zones provided channels for the later upward movement of fluids and melt, likely due to hydrous upwellings caused by the subduction of the Paleo-Pacific system.