Early - Midholocene paleoenvironmental shifts and related seasonalities in Andalusia

安达卢西亚早中新世古环境变化和相关季节性

• 批准号: 413891779
• 负责人: Professor Dr. Dominik Faust
• 金额: --
• 依托单位: Professur für Physische Geographie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/413891779?language=en
• 关键词: Early; Midholocene; paleoenvironmental; shifts; related

In two by the DFG funded projects we were able to depict the fundamentals about Early- and Midholocene paleoenvironmental conditions by means of fluvial dynamics in West and East-Andalusia. This project is based on knowledge obtained from archives of the rivers Guadalete (downstream section) and Galera. We concentrate on a timespan (9 – 5 ka) and investigated soil formation and alluvial deposits in the downstream section of the Rio Guadalete that reached a thickness of 4.5 meters (Wolf et al. 2013; Profile La Ina 3), and tufa formation in the middle course of the Rio Galera that reached up to 5 m in order to obtain a high resolution alluvial history. The tufas at the Rio Galera were fed by rainwater (s. tufa models after PEDLEY 2009) and are qualified for isotope analyses and for further geochemical investigations. The challenge of this project is to test the combination of two methodological approaches. On the one hand we aim to better work out paleoenvironmental shifts by means of fluvial archive study (molluscs and tufas) for the concerned time span. On the other hand we aim to work out environmental seasonality patterns by means of stable isotope analysis (δ13C and δ18O) based on a sclerochronological approach. Therefor we use snail shells from adult species and from well-dated layers. With these sclerochronological data we may be able to depict interannual information on temperature and precipitation that will complete our picture of past environmental and climate variability. We think to combine these two approaches will substantially contribute to a high-resolution research of our sedimentological archives and hence prepare the ground for a profound interpretation.

在DFG基本项目的两个中，我们能够描述西部和东安达卢西亚的河流动力学的早期和中新世古环境条件的基本面。该项目基于从瓜达莱特河（下游部分）和Galera的档案中获得的知识。我们专注于时间板（9-5 ka），并在里奥瓜达莱特（Rio Guadalete）的下游部分研究了土壤形成和冲积沉积物，该部分达到了4.5米的厚度（Wolf等，2013; profile la Ina 3），以及在Rio Galera的中间过程中形成的Rio Galera中，可达到5 m的中间阶段，以获得高度的高空作用。 Rio Galera的TUFA由Rainwater（Pedley 2009年后的TUFA模型）喂食，并有资格进行同位素分析并进行进一步的地球化学研究。该项目的挑战是测试两种方法学方法的组合。一方面，我们旨在通过相关时间跨度通过河流存档研究（软体动物和TUFAS）更好地解决古环境转移。另一方面，我们的目标是通过稳定的同位素分析（Δ13C和Δ18O）来制定环境季节性模式。因此，我们使用来自成年物种和过时的层的蜗牛壳。通过这些硬化数据，我们可能能够描述有关温度和降水的年际信息，这些信息将完成我们过去环境和气候变化的情况。我们认为将这两种方法结合起来将大大促进对我们的沉积学档案的高分辨率研究，从而为深刻的解释做准备。

项目成果

Holocene landscape evolution in the Baza Basin (SE-Spain) as indicated by fluvial dynamics of the Galera River

• DOI: 10.1016/j.qsa.2021.100030
• 发表时间: 2021-10
• 作者: D. Wolf;F. García-Tortosa;C. Richter;J. Dabkowski;Christopher-Bastian Roettig;D. Faust