Data supporting "Mid-mantle discontinuities beneath subduction zones linked to depth-dependent deformation of bridgmanite"

In this work, we show that the depth-dependent behaviour of bridgmanite deformation leads to the development of strain-induced seismic (anisotropic) discontinuities in the mid-mantle around high-stress regions. The depth of the anisotropic discontinuity begins to emerge near ~1000 km depth, and deepens depending on the extent of the accumulated deformation. As such, it broadly matches the depth distribution of some of the observed mid-mantle reflectors and scatterers beneath subduction zones. Under the folder mantle_models/, you will find the repository of the lower mantle models (i.e., elastic tensor at each point in 2D space) corresponding to the penetrating slab model (Figure 2), shallowly stagnant slab model (Supplementary Figure 2), and penetrating slab model but for the faster bridgmanite slip transition mechanism (Supplementary Figure 7). In synthetic_waveforms/, you will find the synthetic seismograms in SAC format. Finally, the folder VPSC_input_files/ contains the relevant input parameters needed to run the VPSC simulations for bridgmanite deformation.本研究表明，布里奇曼石（bridgmanite）变形的深度依赖性行为，会在高应力区域周围的地幔中部形成应变诱发的地震（各向异性）间断面。该各向异性间断面的起始深度约为1000公里，并会随着累积变形程度的加深而向更深部延伸。据此，其深度分布与俯冲带下方部分已观测到的地幔中部反射体及散射体的分布大体吻合。在`mantle_models/`文件夹下，可获取对应以下模型的下地幔模型数据集（即二维空间各点的弹性张量）：穿透型板块模型（图2）、浅滞留板块模型（补充图2），以及采用更快布里奇曼石滑移过渡机制的穿透型板块模型（补充图7）。在`synthetic_waveforms/`文件夹中，可获取SAC格式的合成地震图。最后，`VPSC_input_files/`文件夹包含了用于运行布里奇曼石变形VPSC模拟所需的相关输入参数。