TephroBridge: Establishing a TEPHROstratigraphy for the Eastern Anatolian Volcanic Provenance to BRIDGE the gap in the knowledge in eastern Mediterranean chronology

TephroBridge：建立东安纳托利亚火山起源的 TEPHRO 地层学，以弥合东地中海年代学知识的差距

• 批准号: 537530728
• 负责人: Professor Dr. Achim Brauer
• 金额: --
• 依托单位: Sektion 4.3: Klimadynamik und Landschaftsentwicklung
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/537530728?language=en
• 关键词: TephroBridge; Establishing; TEPHROstratigraphy; Eastern; Anatolian

The eastern Mediterranean is highly sensitive to abrupt climatic changes due to its location at the confluence of distinct atmospheric circulations. Past environmental records offer insights into the climatic drivers and environmental responses. However, chronological uncertainties present challenges in fully understanding potential regional climatic (a)synchronies. The method of using tephra (volcanic ash), both visible and non-visible (cryptotephra), can be a powerful chronological tool to overcome these problems. By geochemically characterising volcanic sources and their eruptions, tephra correlations can offer precise dating and synchronous time markers (isochrones), enabling the linking and dating of records across regions. The proposed research of TephroBridge aims to establish a detailed tephrostratigraphy for one such important volcanic centre, the Eastern Anatolian Volcanic Province (EAVP). The volcanoes of Nemrut and Süphan are significant sources of tephra in the region, found in numerous palaeoclimatic and archaeological records, but a comprehensive tephrostratigraphy is still lacking. The study plans to geochemically characterise the tephra layers from Lake Van's Ahlat Ridge core (5034-2) using techniques like electron probe micro-analysis (EPMA) and LA-ICP-MS. Petrographic identification, morphological descriptions, and thin section analysis will further characterise the tephra layers. The research aims to correlate these newly geochemically analysed tephra layers, the major, minor, and trace element compositions, with cryptotephra layers found in the Dead Sea record and other important palaeoclimatic and archaeological records in the region. The study's future success is demonstrated so far by the TephroMed project, which correlated cryptotephra layers from the Dead Sea to Lake Van's tephra layers, refining the Levant's chronology and providing insights into past climatic variability. Overall, this research project will establish a comprehensive tephrostratigraphic framework for the EAVP. This will enable improved synchronisation of regional records using tephra layers to enhance insights into past climatic responses in the eastern Mediterranean, bridging the gap in knowledge of the current Mediterranean chronology.

由于地中海东部位于不同大气环流的交汇处，因此对突然的气候变化高度敏感。过去的环境记录提供了对气候驱动因素和环境响应的深入了解，但是，时间上的不确定性给充分了解潜在的区域气候带来了挑战。使用可见和不可见的火山灰（火山灰）的方法可以成为克服这些问题的强大年代工具。 TephroBridge 的拟议研究旨在为东部这样一个重要的火山中心建立详细的火山地层学。安纳托利亚火山省 (EAVP) 内姆鲁特火山和苏凡火山是该地区火山灰的重要来源，在许多地方都发现了火山灰。古气候和考古记录，但仍缺乏全面的地层学记录。该研究计划使用电子探针微量分析 (EPMA) 和 LA-ICP-MS 等技术对凡湖 Ahlat Ridge 核心 (5034-2) 的火山灰层进行地球化学表征。岩相鉴定、形态描述和薄片分析将进一步表征火山灰层的特征，该研究旨在将这些新的地球化学分析关联起来。火山灰层、主要元素、微量元素和微量元素成分，以及在死海记录和该地区其他重要古气候和考古记录中发现的隐岩层，该研究的未来成功是通过 TephroMed 项目来证明的，该项目将隐岩层进行了关联。从死海到凡湖的火山灰层，完善黎凡特的年代学并提供对过去气候变化的见解总体而言，该研究项目将建立一个全面的研究项目。 EAVP 的火山地层框架将能够利用火山灰层改善区域记录的同步性，以增强对地中海东部过去气候反应的了解，从而弥合当前地中海年代学的知识差距。