Mechanism for the Uplift of Gongga Shan in the Southeastern Tibetan Plateau Constrained by 3D Magnetotelluric Data

Gongga Shan (GGS) is the highest mountain on eastern margin of Tibetan Plateau. However, mechanism for uplift still unclear due to a lack detailed geophysical studies. Inversion an array magnetotelluric data at 120 sites produced 3D resistivity model that revealed GGS massif characterized by high upper crust underlain westward dipping resistor middle crustal depths interpreted as underthrust Yangtze Craton (YC). A thin conductive layer sandwiched between these two zones resistivity. This inconsistent with previously published geodynamic models. Based new results, we propose occurs primarily underthrusting YC. Additional may be transpression restraining bend oblique-slip Xianshuihe faults.