Landscape evolution in the northeastern Iranian Plateau reconstructed from Late Pleistocene to Holocene sediment archives

到目前为止，很少有研究重建景观演化推断晚更新世和全新世沉积档案在伊朗高地进行。首先，这是由于半干旱环境的陆地沉积物的意义有限。与湖泊沉积物相比，它们承载了少量的生物环境和气候代用指标，但无论如何都为重建过去的环境和气候条件提供了必要的信息。限制因素包括难以获得重要档案、具有时间和空间差异的形态动力学条件的极端环境条件以及数据解释过程中的复杂性，这些都是在这些档案不连续性之后发生的。对第四纪地貌特征的详细分析允许对多个地质档案进行综合检查，从而能够从有关第四纪地质时期主要环境条件的结论中进行综合。他们的形成。通过这种方式，即使是在空间和时间上覆盖范围有限且仅零星出现的地质档案也能有效地连接起来，以进行广泛的古环境重建。这里最重要的方面之一是沉积时间的精确确定，否则，不同沉积相的对比非常有限。因此，年代地层划分的档案是一个关键的一部分，其个人的古环境信号的对比和组合。在应用项目的过程中，后LGM湖平面退缩的影响和程度在巴杰斯坦普拉亚在伊朗东北部巴尔德斯坎盆地。这将为重建晚更新世和全新世环境变化的区域和超区域趋势提供依据。值得注意的是，在今天的干盐湖的南部边界，在湖平面退缩的过程中，主要是侵蚀和通缩地貌的丰富库存已经开发出来，这保持了最近的景观演变的记录。在向远端切割的冲积扇和平原的过渡带发生了普遍的地形反转，并留下了非常有利的露头位置。这将用于详细的地貌，地层和年代地层研究，以重建湖平面后退的过程和随后的地貌演替。

Very few studies on reconstructing landscape evolution inferred from Late Pleistocene and Holocene sediment archives in the Iranian highlands were conducted so far. Primarily, this is due to the limited significance of terrestrial sediments from semi-arid environments. In contrast to lake sediments, they bear poor amounts of biogenic environmental and climate proxy indicators, but anyway provide essential information for reconstructing past environmental and climatic conditions. Restrictions range from difficult access to an important archive, to extreme environmental conditions with temporally and spatially diverging morphodynamic conditions and to complications during data interpretation, which are following these archive discontinuities.However, detailed analysis of Quaternary relief features allows for a combined examination of multiple geological archives and thus enables a synthesis from conclusions about the predominating environmental conditions during their formation. This way, even geological archives with limited coverage in space and time and only sporadic appearance connect efficiently for an extensive paleo environmental reconstruction. One of the most important aspects here is the precise determination of the time of deposition, as a correlation of the diverging sediment facies is very limited otherwise. Therefore, the chronostratigraphic classification of the archives is a crucial part of the correlation and combination of their individual paleoenvironmental signals.In course of the applied project, effect and extent of the post-LGM lake level retreat within the Bajestan Playa in the northeastern Iranian Bardeskan Basin will be determined. This will provide a base for the reconstruction of regional and supraregional tendencies of late Pleistocene and Holocene environmental change. Notably at the southern border of today’s playa, a rich inventory of mostly erosional and deflational landforms has developed in course of the lake level retreat, which keeps record of the most recent landscape evolution. A prevailing relief inversion took place at the transition zone to the distally dissected alluvial fan and plain, and left an extraordinary convenient situation of outcrops. This shall now be utilised for detailed geomorphological, stratigraphical and chronostratigraphical studies, in order to reconstruct the course of the lake level retreat and the subsequent landform succession.