The intermontane Tarom Basin of NW Iran (Arabia‐Eurasia collision zone) is located at the transition between the Iranian Plateau (IP) to the SW and the Alborz Mountains to the NE. This basin was filled by upper Cenozoic synorogenic red beds that retain first‐order information on the erosional history of adjacent topography, the vertical growth of the plateau margin and its orogen perpendicular expansion. Here, we perform a multidisciplinary study including magnetostratigraphy, sedimentology, geochronology and sandstone petrography on these red beds. Our data show that Eocene arc volcanism in the region terminated at 38‐36 Ma, while intrabasinal synorogenic sedimentation (endorheic conditions) occurred from at least 16.2 to <7.6 Ma, implying that the red beds are stratigraphically equivalent to the Upper Red Formation. After 7.6 Ma, the basin experienced intrabasinal deformation, uplift and erosion with the establishment of external drainage. Fluvial connectivity with the Caspian Sea, however, was interrupted by at least four episodes of basin aggradation. During endorheic conditions, the basin fill did not reach the elevation of the plateau interior and hence the Tarom Basin was never integrated into the plateau. Furthermore, our provenance data indicate that the northern margin of the basin (Alborz Mountains) experienced a greater magnitude of Miocene deformation and erosional exhumation than the southern one (IP margin). This agrees with recent Moho depth estimates, suggesting that crustal shortening and thickening cannot be responsible for the vertical growth of the northern margin of the IP, and hence surface uplift must have been driven by deep‐seated processes.

中文翻译：

---

山间塔罗姆盆地新近纪构造-地貌演化：对伊朗高原北缘（阿拉伯-欧亚大陆碰撞带）盆地充填和高原建造过程的认识

伊朗西北部的山间塔罗姆盆地（阿拉伯-欧亚大陆碰撞带）位于伊朗高原（西南）与西南偏西和阿尔伯兹山脉至东北之间的过渡处。该盆地充满了新生代上层造山带红层，这些红层保留了有关邻近地形的侵蚀历史，高原边缘的垂直增长及其造山带垂直扩展的一阶信息。在这里，我们对这些红层进行了多学科研究，包括地磁学，沉积学，年代学和砂岩岩石学。我们的数据表明，该地区始新世的弧火山活动终止于38-36 Ma，而基底内的共生沉积（内流条件）发生在至少16.2至<7.6 Ma，这表明红层在地层上等同于上红层。在7.6 Ma之后，随着外部排水的建立，盆地经历了基底内变形，隆升和侵蚀。但是，与里海的河流连通性至少被四次盆地积水中断了。在缺水条件下，盆地填充物未达到高原内部的高度，因此塔罗姆盆地从未整合到高原中。此外，我们的物证数据表明，盆地北部边缘（阿尔伯兹山）比南部边缘（IP边缘）经历了更大的中新世变形和侵蚀剥蚀。这与最近的Moho深度估算结果一致，表明地壳的缩短和增厚不能对IP北缘的垂直增长负责，因此地表隆升一定是由深层过程驱动的。