Northern Iranian loess and its palaeoclimatic implication

伊朗北部的黄土记录反映了中第四纪晚期气候变化和地貌演化的多次循环。黄土/古土壤序列代表了该地区气候变化最重要的地质档案，并提供了东南欧和中亚黄土沉积物之间的重要联系。我们目前对伊朗北部黄土的形成、气候指示和地质年代学的认识将通过更复杂的方法来验证，将年代框架扩展到中更新世。我们将对先前检查的和新的黄土部分应用全面的多代理方法，揭示伊朗北部气候变化的幅度和频率。多代理方法将在岩石磁代理、粒度测量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。将基于新的发光方法，例如高温下的后红外IRSL和古地磁数据，建立伊朗北部黄土关键部分的更精确的年代框架。预计将获得大规模地层对比和气候重建的重要数据，包括寒冷阶段极地锋向南的运动。

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.