Due to the subduction of the Paleo-Pacific Plate below the East Asian continent, the North China Craton (NCC) is considered to have been thinned in the Mesozoic, with the lithosphere of its east portion significantly thinned. As the eastern boundary of the NCC, The Tanlu Fault Zone (TLFZ) is one of the largest strike-slip fault systems in eastern Asia. Tanlu is believed to have recorded the destabilization of the NCC. Magnetotelluric array data collected in the TLFZ and adjacent areas are obtained to image the lithospheric three-dimensional resistivity structure and to discuss the structural constraints on this event. According to the resistivity model from the three-dimensional inversion, the crust of the Luxi Uplift (LXU) to the west of the TLFZ and the crust of the Sulu Orogenic Belt (SOB) to the east of the TLFZ exhibits high resistivity (>300 Ωm). Lithospheric mantle of the SOB also exhibits highly resistive characteristics. Conversely, the LXU mantle showed distinct low-resistivity characteristics (C3). Low-resistivity anomalies were found corresponding to both branches of the TLFZ. The eastern branch is a lithospheric low-resistivity belt, while the western branch formed a significant mantle resistivity boundary between the low-resistivity LXU and the high-resistivity SOB. Thus, we considered that molten materials may have upwelled along the weak area of the western branch, inducing a significant lithospheric thinning beneath the LXU. On the other hand, the lithosphere of the SOB has not been significantly thinned according to its high resistivity. The significant contrast of the resistivity may indicate that the western branch of the TLFZ is the boundary between the NCC and the SOB, with the sinistral strike-slip occurring along it.

由于东亚大陆下方古太平洋板块的俯冲作用，华北克拉通（NCC）被认为在中生代变薄，其东部的岩石圈明显变薄。作为NCC的东部边界，Tan庐断裂带（TLFZ）是东亚最大的走滑断层系统之一。据认为，Tanlu记录了NCC的不稳定。获得了在TLFZ及其附近地区收集的大地电磁阵列数据，以对岩石圈三维电阻率结构成像并讨论该事件的结构约束。根据三维反演的电阻率模型，TLFZ以西的鲁西隆起（LXU）地壳和TLFZ以东的苏鲁造山带（SOB）地壳表现出高电阻率（> 300Ωm）。SOB的岩石圈地幔也显示出高电阻特性。相反，LXU地幔显示出独特的低电阻率特征（C3）。发现与TLFZ的两个分支相对应的低电阻率异常。东部分支是岩石圈低电阻率带，而西部分支在低电阻率LXU和高电阻率SOB之间形成了显着的地幔电阻率边界。因此，我们认为熔融材料可能已在西部分支的薄弱区域上涌，导致LXU下方岩石圈明显变薄。另一方面，SOB的岩石圈由于其高电阻率而尚未显着变薄。