Loess-palaeosol sequences as archives for Late Pleistocene environmental conditions in central Spain

黄土-古土壤序列作为西班牙中部更新世晚期环境条件的档案

• 批准号: 230828775
• 负责人: Professor Dr. Dominik Faust
• 金额: --
• 依托单位: Lehrstuhl für Geomorphologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/230828775?language=en
• 关键词: Loess; palaeosol; sequences; archives; Late

The aim of the project is to reconstruct Late Pleistocene environmental conditions by using loess-palaeosol sequences in central Spain. In this area information about the Late Pleistocene derived from terrestrial archives is rare. Huge sequences of loess and loess-like sediments in the Tagus Basin have a great potential to close this scientific gap. The focus is on original loess deposits (true loess), which allow direct conclusions about processes and time frames of the aeolian translocation. Furthermore, relocated loess sediments as well as alluvial loess are considered to detect periods of higher geomorphic activity. Included palaeosols are used to detect climatically or hygrally favourable periods. The immediate objective is to study at least 5 sediment profiles by using a sedimentological and pedogenetic approach to develop a composite profile for the loess deposits of the upper Tagus catchment in central Spain. A chronological resolution is ensured by the OSL-dating of stratigraphically important positions. The compiled standard profile will be the basis to derive Late Pleistocene environmental conditions and environmental changes. Especially the comparison with the results of the project, dealing with Late Quaternary fluvial dynamics of the Jarama River that drains areas with huge loess accumulations, will facilitate the development of a high-resolution model of the Late Pleistocene landscape evolution in central Spain. A further focus will be on the provenances of the loess sediments to differentiate between the local component and long distance transportation, as well as to detect dominant wind directions.

该项目的目的是利用西班牙中部的黄土-古土壤序列重建晚更新世的环境条件。在这一地区，来自陆地档案的有关更新世晚期的信息很少。塔霍盆地巨大的黄土和类黄土沉积物序列具有弥补这一科学差距的巨大潜力。重点是原始黄土沉积物（真正的黄土），它可以直接得出关于风积易位的过程和时间框架的结论。此外，重新定位的黄土沉积物以及冲积黄土被认为可以检测地貌活动较高的时期。所包含的古土壤用于检测气候或湿度有利的时期。近期目标是通过使用沉积学和成土方法研究至少 5 个沉积物剖面，以开发西班牙中部塔霍河上游流域黄土沉积物的综合剖面。地层重要位置的 OSL 测年确保了按时间顺序的解析。编制的标准概况将成为推导晚更新世环境条件和环境变化的基础。特别是与该项目的结果进行比较，处理流经大量黄土堆积地区的哈拉马河晚第四纪河流动力学，将有助于开发西班牙中部晚更新世景观演化的高分辨率模型。进一步的重点将是黄土沉积物的来源，以区分局部成分和长距离运输，以及检测主导风向。