Accommodation of plate convergence during the Arabia-Eurasia collision is expressed in the exhumation record of the broad collision zone. In order to better constrain the spatial and temporal patterns of exhumation, this paper presents new geochronology (zircon U-Pb) and thermochronology (zircon and apatite (U-Th)/He, and apatite fission track) data for 18 samples from the Talesh Mountains of northwest Iran. The Talesh and the adjacent Alborz Mountains form the northern side of the Iranian Plateau, itself a first order feature of the collision zone. Zircon U-Pb ages in the Talesh record late Neoproterozoic intrusion and metamorphism (~570 Ma), and a series of Jurassic, Cretaceous, and Oligocene intrusive events. Zircon U-Th/He ages are predominantly Mesozoic (150–90 Ma), whereas apatite (U-Th)/He ages are <20 Ma. Our inverse thermal modeling of apatite fission-track data suggests that the Talesh region shares a similar exhumation history with the Alborz that includes the Paleocene-early Eocene, Oligocene and Miocene events, but responds variably. When integrated with previous results, the combined data show a less exhumed zone in the Talesh and westernmost Alborz as a more rigid unit, and regionally enhanced exhumation by the Late Miocene. Late Miocene onset of deformation may relate to a re-organization of Arabia-Eurasia plate convergence. The causes of this re-organization are debated, but could include elevation of the Iranian Plateau to a level at which it resisted further thickening, causing deformation to be accommodated in other regions.

阿拉伯-欧亚大陆碰撞期间板块会聚的适应体现在广泛碰撞带的折返记录中。为了更好地约束挖掘的时空模式，本文提供了来自塔莱什的 18 个样品的新地质年代学（锆石 U-Pb）和热年代学（锆石和磷灰石 (U-Th)/He，以及磷灰石裂变轨迹）数据。伊朗西北部的山脉。Talesh 和相邻的 Alborz 山脉构成了伊朗高原的北侧，这本身就是碰撞带的一级特征。Talesh 中的锆石 U-Pb 年龄记录了晚新元古代侵入和变质作用（~570 Ma），以及一系列侏罗纪、白垩纪和渐新世侵入事件。锆石 U-Th/He 年龄主要是中生代 (150-90 Ma)，而磷灰石 (U-Th)/He 年龄小于 20 Ma。我们对磷灰石裂变径迹数据的逆热模型表明，Talesh 地区与 Alborz 地区有着相似的挖掘历史，包括古新世-早始新世、渐新世和中新世事件，但响应各不相同。当与之前的结果相结合时，综合数据显示，塔莱什和阿尔伯兹最西端的挖掘较少的区域作为一个更刚性的单元，并且中新世晚期的区域挖掘增强。中新世晚期开始的变形可能与阿拉伯-欧亚板块辐合的重组有关。这种重组的原因尚有争议，但可能包括将伊朗高原抬高到能够抵抗进一步增厚的水平，从而导致其他地区能够适应变形。