Impact of long-term explosive volcanism from Nemrut and Süphan volcanoes on the compositional, temporal, dynamic, and paleoclimatic evolution of Lake Van (Turkey)

内姆鲁特火山和苏凡火山的长期爆发性火山活动对凡湖的成分、时间、动态和古气候演化的影响（土耳其）

• 批准号: 168019940
• 负责人: Professor Dr. Hans-Ulrich Schmincke
• 金额: --
• 依托单位: Forschungseinheit Magmatische und Hydrothermale Systeme
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/168019940?language=en
• 关键词: Impact; long; term; explosive; volcanism

The temporal, geodynamic and environmental (paleoclimatic) reconstruction of a tectonically and volcanically highly active lake basin, bordered by active volcanoes Nemrut and Süphan, over the past c. 500 ka is the overall objective. Research strategies include fieldwork on the explosive products of both volcanoes and likely >500 tephra layers to be obtained by drilling into Lake Van in 2010, tephra layers representing the stratigraphic and temporal framework of the cores. Analytical methods, including structure, texture, mineralogical and chemical composition (XRF, EMP, laser-ICP-MS of glass and phenocrysts and 40Ar/39Ar single crystal dating), will allow determining the magnitude of eruptions, their distribution in time and space, correlation between drill sites and mass flux into the alkaline lake through time. Climate proxies include paleosols separating tephra units and paleowind directions. Temporal and dynamic reconstruction of fallout, pyroclastic flows, flank collapses and tsunamis resulting from sudden mass impact onto the lake will help to assess hazard and risk for the rapidly developing areas bordering huge Lake Van.

时间，地球动力学和环境（古气候）重建的构造和火山高度活跃的湖盆，接壤的活火山Nemrut和Süphan，在过去的c。500 ka是总体目标。研究战略包括对两座火山的爆炸产物进行实地考察，并在2010年通过在货车湖钻探获得可能超过500层的火山灰层，火山灰层代表了岩心的地层和时间框架。包括结构、结构、矿物学和化学成分在内的分析方法（X射线荧光分析法、电磁脉冲法、玻璃和斑晶的激光-电感耦合等离子体质谱法和40 Ar/39 Ar单晶定年法）将有助于确定喷发的规模、喷发的时空分布、钻孔地点与随时间流入碱湖的质量流量之间的相互关系。气候代用指标包括分离火山灰单元的古土壤和古风向。时间和动态重建的沉降物，火山碎屑流，侧翼崩溃和海啸造成的突然大规模影响到湖将有助于评估危险和风险的快速发展的地区毗邻巨大的湖货车。