Application of Laser Ablation Multi Collector Inductively Coupled Plasma Mass Spectrometry (LA MC ICPMS) for 230Th/U-dating of speleothems and paleoclimate reconstruction

我申请在英国布里斯托大学的布里斯托动态全球环境研究计划（BRIDGE）工作一年，以熟悉尖端的激光烧蚀多收集器电感耦合等离子体质谱（LA MC ICPMS）技术，这是我目前在海德堡的职位所不具备的。我想将这些方法应用于Hüttenbläserschachthöhle（Sauerland，德国西部）的石笋HBSH-1，根据初步的热电离质谱（TIMS）230 Th/U年代测定，它在过去25万年的几个温暖阶段生长。LA MC ICPMS ~（230）Th/U定年方法的应用可获得最高的定年精度和空间年龄分辨率。此外，将通过LA ICPMS在HBSH-1上测量高分辨率微量元素分布。当我回到德国时，我想在那里建立这些方法。石笋HBSH-1将根据过去的气候变化进行解释，而DFG研究小组DAPHNE的结果将支持这种解释，该研究小组研究了附近Bunkerhöhle的石笋。此外，我想开发一个通用的算法来构建石笋年龄模型。该算法将使用HBSH-1上的高分辨率年龄信息进行测试。

I apply to spend one year at the Bristol Research Initiative for a Dynamic Global Environment (BRIDGE) at Bristol University, United Kingdom, to become acquainted with cutting-edge Laser Ablation Multi Collector Inductively Coupled Plasma Mass Spectrometry (LA MC ICPMS) techniques, which are not available at my current position in Heidelberg. I want to apply these methods to stalagmite HBSH-1 from Hüttenbläserschachthöhle (Sauerland, western Germany), which grew during several warm phases within the last 250,000 years as revealed by preliminary Thermal Ionization Mass spectrometry (TIMS) 230Th/U-dating. Application of LA MC ICPMS 230Th/U-dating allows obtaining the highest dating accuracy and spatial age resolution. In addition, high-resolution trace element profiles will be measured on HBSH-1 by LA ICPMS. When I return to Germany, I would like to establish these methods there. Stalagmite HBSH-1 will be interpreted in terms of past climate variability, and the interpretation will be supported by the results of the DFG research group DAPHNE, which works with stalagmites from the nearby Bunkerhöhle. Furthermore, I want to develop a general algorithm to construct stalagmite age models. This algorithm will be tested using the high-resolution age information on HBSH-1.