The Shanxi Rift System (SRS) is a prominent intracontinental rift in eastern Eurasia. However, its tectonic origin remains enigmatic, as the timing of rift initiation and its subsequent evolution is not well constrained. To evaluate the cooling history of rift flanks, we present joint apatite fission track (n = 15) and apatite (U‐Th‐Sm)/He (n = 62) thermochronological study across the Huo Shan and the Zhongtiao Shan in the central and southern SRS, respectively. Inverse modeling of the thermochronological data yields two episodes of enhanced exhumation during the Cenozoic. Both ranges record rapid cooling circa 50‐35 Ma, coeval with a phase of widespread rifting across entire North China. Data from the Zhongtiao Shan record renewed cooling from ∼8 Ma to the present, following a protracted near‐isothermal condition. Considering the SRS in the context of plate reconstructions, we propose that the Eocene rift initiation is triggered by the subduction of the trench‐parallel Izanagi‐Pacific mid‐ocean ridge followed by subduction of the Pacific plate. Tectonic quiescence along the Shanxi rift during Oligocene and Miocene time reflects slow thermal subsidence as the Pacific subduction regime was established. In late Miocene, faults associated with the SRS were reactivated in dextral transtension linked to fault systems that extend outward from the northeastern Tibetan Plateau. This kinematic reorganization implies a fundamental change in force balance throughout North China. Overall, our results reflect the changing influence of tectonic regimes along the eastern Eurasian plate boundary and intracontinental deformation associated with the India‐Eurasia collision.

中文翻译：

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华北山西裂谷系统的形成与演化：来自板块重建框架的低温热年代学证据

山西裂谷系统（SRS）是欧亚大陆东部一个重要的大陆内部裂谷。但是，它的构造起源仍然是个谜，因为裂谷开始的时间及其随后的演化没有受到很好的限制。为了评估裂谷侧面的冷却历史，我们给出了联合磷灰石裂变径迹（n  = 15）和磷灰石（U-Th-Sm）/ He（n = 62）在SRS中部和南部分别对霍山和中条山进行热年代学研究。热年代学数据的逆向建模在新生代产生了两次发掘增强的发掘。这两个范围都记录了大约50-35 Ma的快速冷却，同时整个华北地区也开始出现裂谷。在长期等温的情况下，中条山的数据记录了从约8 Ma到现在的新的降温。考虑到板块重建背景下的SRS，我们建议始新世裂谷是由海沟平行的Izanagi-Pacific中洋洋脊俯冲然后俯冲太平洋板块触发的。渐新世和中新世时期山西裂谷的构造静止反映了随着太平洋俯冲机制的建立，热沉降缓慢。在中新世晚期，与SRS有关的断层在右旋伸展中重新激活，右旋断层与从东北青藏高原向外延伸的断层系统有关。这种运动学上的重组意味着整个华北地区的兵力平衡发生了根本性的变化。总体而言，我们的结果反映了沿欧亚大陆东部板块边界的构造体制变化的影响以及与印度-欧亚大陆碰撞有关的洲内变形。这种运动学上的重组意味着整个华北地区的兵力平衡发生了根本性的变化。总体而言，我们的结果反映了沿欧亚大陆东部板块边界的构造体制变化的影响以及与印度-欧亚大陆碰撞有关的洲内变形。这种运动学上的重组意味着整个华北地区的兵力平衡发生了根本性的变化。总体而言，我们的结果反映了沿欧亚板块东部边界的构造体制变化的影响以及与印度-欧亚大陆碰撞有关的洲内变形。