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尔大学的动态全球环境布里斯托尔研究计划(布里斯托尔研究倡议)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，这些技术在我目前在海德堡的职位上是不具备的。我想将这些方法应用于来自德国西部索尔兰州Hüttenbläserschachthöhle的石笋HBSH-1，根据初步的热电离质谱(TIMS)230Th/U测年，它在过去250,000年中经历了几个温暖阶段。应用LA MC ICPMS230TH/U测年技术可以获得最高的测年精度和空间年龄分辨率。此外，LA ICPMS将在HBSH-1上测量高分辨率的微量元素分布。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，DFG研究小组Daphne的结果将支持这一解释，该小组研究的是来自附近Bunkerhöhle的石笋。此外，我还想开发一个通用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.