Abstract Active oblique collision between the Caribbean and North America plates has led to the formation of the Septentrional forearc sliver, which is a wedge-shaped crustal domain limited to the north by the North Hispaniola subduction thrust and to the south by the Septentrional Fault Zone (SFZ). In northern Hispaniola, oblique collision of the Bahamas Platform began in the uppermost Pliocene to Early Pleistocene and continues today. Collision-related tectono-stratigraphic processes include destruction of the shallow-water carbonate forearc platform, uplift and erosion of the Cordillera Septentrional and Samana Peninsula, emergence of the Cibao Basin and syn-tectonic deposition of alluvial fan systems. The geometry and kinematics of neotectonics structures at all scales, together with stress field solutions obtained from late Cenozoic fault-slip data, show that the ENE-directed (far-) stress field associated with collision triggered the formation of the WNW-trending, left-lateral strike-slip SFZ. The SFZ thus represents the inland, concave master fault bounding the Septentrional forearc sliver. Subsidiary ENE to NE-trending left-lateral strike-slip faults (R-type) and NNE to NE-trending normal and oblique faults (T-type) controlled the internal deformation and subdivision into smaller tectonic blocks of the sliver. The highly oblique convergence and the increase in frictional plate coupling associated with the underthrusting of the Bahamas Platform are the likely causes of the formation of this forearc sliver. In the Western Cordillera Septentrional and Cibao Basin, an extensional regime is locally produced by the transfer of the left-lateral movement to a southern splay of the SFZ with the incorporation of a detached block to the Septentrional forearc sliver during the Middle Pleistocene-Holocene. The regional distribution of the modeled Peak Ground Acceleration values indicates that the SFZ is the greatest seismic hazard in northern Hispaniola.

中文翻译：

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伊斯帕尼奥拉岛北部与斜向碰撞和弧前条带形成相关的新构造构造和应力场：对地震危险性评估的意义

摘要 加勒比板块和北美板块之间的活跃斜向碰撞导致了Septentrional前弧条带的形成，这是一个楔形地壳域，其北部受北伊斯帕尼奥拉俯冲冲断力限制，南部受Septentrional断层带限制（ SFZ）。在伊斯帕尼奥拉岛北部，巴哈马地台的斜向碰撞始于上新世至早更新世的最上层，并一直持续到今天。与碰撞相关的构造地层过程包括浅水碳酸盐岩前弧台地破坏、中隔山脉和萨马纳半岛的抬升和侵蚀、磁宝盆地的出现和冲积扇系统的同构造沉积。所有尺度的新构造结构的几何学和运动学，连同从晚新生代断层滑动数据获得的应力场解，表明与碰撞相关的 ENE 导向（远）应力场触发了 WNW 向、左侧走滑 SFZ 的形成。因此，SFZ 代表了内陆的凹主断层，它包围了 Septentrional 前弧条带。副 ENE 至 NE 向左旋走滑断层（R 型）和 NNE 至 NE 向正断层和斜断层（T 型）控制内部变形并细分为更小的条带构造块。与巴哈马地台下冲相关的高度倾斜会聚和摩擦板耦合的增加是形成这种前弧条带的可能原因。在西科迪勒拉中隔和磁宝盆地，在中更新世 - 全新世期间，通过将左侧运动转移到 SFZ 的南部张开，将分离块合并到 Septentrional 前弧裂片中，局部产生了伸展状态。模拟的峰值地面加速度值的区域分布表明 SFZ 是伊斯帕尼奥拉岛北部最大的地震灾害。