Northern Iranian loess and its palaeoclimatic implication

伊朗北方的黄土记录反映了第四纪中晚期气候变化和景观演化的多次循环。黄土/古土壤序列代表了该地区最重要的气候变化地质档案，并提供了东南欧和中亚黄土沉积之间的重要联系。我们目前对伊朗北方黄土的形成、气候指示和年代学的认识，将用更复杂的方法加以验证，将年代框架扩展到中更新世。我们将解开在伊朗北方气候变化的幅度和频率应用一个全面的多代理方法，以前检查和新的黄土剖面。多代用指标方法将在岩石磁性代用指标、粒度测定和风化强度指标的高分辨率研究中探索降水、温度和风速的波动。基于新的发光方法，如高温下的后IR IRSL和古地磁数据，将建立伊朗北方黄土关键剖面的更精确的年代学框架。种子数据预计大规模的地层对比和气候重建，包括在寒冷阶段的极地锋的南移。

The loess record of Northern Iran reflects numerous cycles of climate change and landscape evolution for the Middle to Late Quaternary period. The loess/palaeosol sequences represent the most important geoarchive of climate change in the region and provide an important link between loess deposits in Southeastern Europe and Central Asia. Our present understanding on the formation, climate indication and geochronology of northern Iranian loesses shall be verified with more sophisticated methods extending the chronological framework towards the Middle Pleistocene. We will unravel the amplitudes and frequencies of climate change in Northern Iran applying a comprehensive multi-proxy approach to previously examined and new loess sections. The multi-proxy approach will explore fluctuations of precipitation, temperature and wind speed in high resolution studies of rock magnetic proxies, granulometry and indicators of weathering intensity. A more precise chronological framework for loess key sections of Northern Iran will be established as based on new luminescence methods, such as post-IR IRSL at elevated temperatures and palaeomagnetic data. Seminal data is expected for large-scale stratigraphic correlations and climate reconstructions including the southern movement of the polar front during cold stages.