Abstract The north-trending Huangling Dome, located on the northern margin of the reactivated Yangtze Platform, provides an appropriate place to understand the complexity of intraplate deformation of the South China continent since the Early Mesozoic. In this study, palaeostress analysis using calcite twins was carried out to address the deformation mechanism of the dome, poorly understood at present. Ten limestone samples and three marble samples were collected from the platform cover on the eastern and western flanks and the core basement, measured under the universal stage, and inverted for stress analysis using our recently proposed method. All the stress estimates for the samples were classified into two layer-parallel shortening (LPS) subsets and two non-LPS subsets. They represent NW–SE compression, NE–SW compression, N–S compression, and N–S or E–W extension, respectively, in correspondence to principal tectonic events since the Early Mesozoic. They do not verify existing explanations about the genesis of the dome, for example, extrusion-induced E–W compression and differential uplift-related E–W extension. A new formation model was therefore proposed: under the nearly N–S compression, the dome initiates as an E–W trending brachy anticline and, owing to basement inheritance and variation of regional shortening, gains the current configuration.

中文翻译：

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偏应力张量的多相方解石孪晶数据反演：2.在华南北部黄陵穹顶的应用

摘要 北向的黄陵穹窿位于复活的扬子地台北缘，为了解早中生代以来华南大陆板内变形的复杂性提供了合适的场所。在这项研究中，使用方解石孪晶进行古应力分析以解决目前知之甚少的穹顶变形机制。从东侧和西侧的平台覆盖层和岩心基底上采集了 10 个石灰岩样品和 3 个大理石样品，在通用平台下测量，并使用我们最近提出的方法倒置进行应力分析。样本的所有应力估计值分为两个层平行缩短 (LPS) 子集和两个非 LPS 子集。它们代表 NW-SE 压缩、NE-SW 压缩、N-S 压缩、和 N-S 或 E-W 延伸，分别对应于早中生代以来的主要构造事件。他们没有验证关于圆顶起源的现有解释，例如，挤压引起的 E-W 压缩和与差异隆起相关的 E-W 扩展。因此提出了一种新的地层模型：在近 N-S 压缩下，穹顶以 E-W 趋势的短背斜开始，并且由于基底继承和区域缩短的变化，获得了当前配置。