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.

地中海东部由于处于不同大气环流的交汇处，对气候突变非常敏感。过去的环境记录提供了对气候驱动因素和环境响应的见解。然而，时间上的不确定性对充分理解潜在的区域气候(a)同步性提出了挑战。使用火山灰（火山灰）的方法，包括可见的和不可见的（隐火山灰），可以成为克服这些问题的强大的时间工具。通过地球化学特征的火山来源和他们的爆发，火山相关性可以提供精确的年代和同步的时间标记（等时线），使跨地区的记录连接和年代确定。TephroBridge的拟议研究旨在为东安纳托利亚火山省（EAVP）这样一个重要的火山中心建立详细的地层。Nemrut和s<s:1>潘火山是该地区重要的地热来源，在许多古气候和考古记录中都有发现，但仍然缺乏全面的地热地层学。该研究计划利用电子探针显微分析（EPMA）和LA-ICP-MS等技术，对Van湖Ahlat Ridge岩心（5034-2）的tephra层进行地球化学表征。岩石学鉴定、形态描述和薄片分析将进一步表征该层。这项研究的目的是将这些新的地球化学分析的麻黄层，主要、次要和微量元素组成，与死海记录和该地区其他重要的古气候和考古记录中发现的隐麻黄层联系起来。到目前为止，TephroMed项目证明了这项研究未来的成功，该项目将死海的隐热层与凡湖的隐热层联系起来，完善了黎凡特地区的年表，并提供了对过去气候变化的见解。总的来说，本研究项目将建立一个全面的地层格架。这将使利用温度层改进区域记录的同步化，从而加强对地中海东部过去气候反应的洞察，弥合对当前地中海年代学知识的空白。