Since 55 Ma, the India-Eurasia collision has produced an E- to SE extrusion from central Tibet towards South China and Indochina (Clark and Royden, 2000, Royden et al., 2008 Yin and Harrison, 2000). In addition, with the thermal springs exposed in the subsurface of the Lugu Lake region, we suggest that a potential geothermal field could be developed underneath the LXF and NW sides of the Lugu Lake region. Therefore, the LXF presents significant left-lateral strike-slip deformation, and the Ninglang fault presents right-lateral strike-slip deformation. After crossing the LXF, part of the mid-crustal ductile material moved to the NE between the LXF and Ninglang fault. The high conductors probably originated northwest of the Lijiang area. Based on the framework of the material escape to the east of the Tibetan Plateau and the strike-slip polarity of the active faults, we propose a new geodynamic model for the study area. These results indicate that the conductors along the LXF zone become shallower and smaller from the SW to NE. One of the conductors is at a depth of approximately 15–35 km with a length of 40 km in the southwest profile, whereas the other is at a depth of approximately 10–20 km with a length of 20 km in the northeast profile.
The results indicate that there are two high conductors (1–10 Ωm) beneath the LXF zone. This is a crucial area where the long-wavelength topography can be used to identify motions of the ductile flow beneath the eastern Tibetan Plateau to the Yangtze platform. We used data from 62 broadband magnetotelluric (MT) stations along two NNW -SSE profiles cross sections around the Lijiang - Xiaojinhe fault (LXF) using 3-D inversion.
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