Cenozoic sediments of the Tajik basin: sedimentology, provenance, and the tectonic record of the Pamir

塔吉克盆地帕米尔高原西部前陆，包含了早白垩世至晚新近纪长达10 km的前构造和同构造单元连续序列；其沉积物记录了帕米尔和天山逆冲褶皱体系的发掘和扩展。我们研究了盆地北部、中部和东部的剖面，重点研究了活跃的盆地边缘。我们的沉积学和物源学研究追踪了帕米尔和天山的发掘时间以及构造和沉积学/相演化；详细的研究，特别是在盆地中心，是必要的，以把盆地不同部分的明显不同的历史联系起来。进一步的主题将是在帕米尔主冲断带和天山褶皱冲断带之间的阿莱河谷和天山西部的山内盆地中保存的同构造新近系矿床的物源问题。对于后者，我们想要澄清它们是帕米尔前陆盆地的一部分，还是必须被认为是天山冲断带的背驮式盆地。对于塔吉克盆地内正在进行的研究，我们将结合同构造沉积的相、沉积几何和堆积模式的调查，详细的物源分析，包括沉积物的碎屑地热年代学。

The western foreland of the Pamir, the Tajik basin, contains an up to 10 km thick continuous succession of pre- and syn-tectonic units, spanning the Early Cretaceous to the late Neogene; its sediments record the exhumation and the propagation of the thrust-fold systems of the Pamir and the Tien Shan. We investigated sections in the northern, central, and eastern part of the basin with a focus on the active basin margins. Our sedimentologic and provenance studies trace the timing of exhumation of both the Pamir and Tien Shan and the structural and sedimentologic/facies evolution; detailed studies, in particular also in the basin center, are necessary to bring the apparently disparate histories of different parts of the basin together. A further topic will be the provenance of syn-tectonic Neogene deposits, preserved in the Alai valley between the Main Pamir Thrust zone and the Tien Shan fold-thrust belt and in the intra-montane basins of the western Tien Shan. For the latter, we want to clarify whether they were part of the foreland basin of the Pamir or have to be considered as piggy-back basins of the Tien Shan thrust belt. As for the ongoing research within the Tajik basin, we will combine investigations of facies, sediment-geometries, and stacking patterns of syn-tectonic deposits, detailed provenance analysis, including detrital geo-thermochronology of the sediments.