The crustal imprints from multistage tectonic activities in cratons offer valuable insights into continental evolution. Utilizing seismic data from two densely deployed, nearly perpendicular linear arrays, and a newly developed stepwise joint inversion of depth-domain receiver function and surface wave dispersion, we constructed a detailed crustal layering model for the Yangtze Craton. Our analysis revealed elongated double velocity reversal zones as salient features of the crust, which likely record ancient crustal reworking and juvenile crustal growth associated with Neoproterozoic rift-related magmatic processes. The interlayering of low- and high-velocity structures may contribute to the enduring stability of the Yangtze Craton. Additionally, superimposed layers separated by east-dipping interfaces and abrupt changes in crustal thickness in the boundary belts surrounding the Yangtze Craton document the crust's structural responses to intracontinental deformation during continent assembly.

中文翻译：

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长江克拉通地壳结构成像对古代大陆的大陆内部变形和地壳改造的洞察


克拉通中多阶段构造活动的地壳印记为大陆演化提供了有价值的见解。利用来自两个密集部署、几乎垂直的线性阵列的地震数据，以及新开发的深域接收器函数和表面波色散的逐步联合反演，我们为长江克拉通构建了一个详细的地壳分层模型。我们的分析揭示了细长的双速反转带是地壳的显着特征，这可能记录了与新元古代裂谷相关的岩浆过程相关的古老地壳改造和幼年地壳生长。低速和高速结构的交叠可能有助于长江克拉通的持久稳定性。此外，由东倾界面分隔的叠加层和长江克拉通周围边界带中地壳厚度的突然变化记录了地壳在大陆组装过程中对大陆内变形的结构响应。