Evolution of highly explosive Nemrut and Süphan volcanoes (NE Anatolia) and Lake Van basin during the past 500.000 years

过去 50 万年来高爆内姆鲁特火山和苏凡火山（安纳托利亚东北部）和凡湖盆地的演化

• 批准号: 148952542
• 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: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/148952542?language=en
• 关键词: Evolution; highly; explosive; Nemrut; phan

The overall objective is a temporal, geodynamic and environmental reconstruction of a tectonically and volcanically highly active, volcano-bordered, closed lake basin. Coupling of the systems active volcanoes Nemrut and Süphan - alkaline Lake Van (Anatolia) over the past c. 500 ka will be studied by analyzing deposits of large explosive eruptions on land and via available short cores in preparation for a lake drilling project (2010). Tephra of widespread major explosive volcanic events from both volcanoes (fallout and flow deposits) will be analyzed in the field and laboratory by structural, textural, compositional and physical age determinations (XRF, EMP, laser-ICP-MS of glass and phenocrysts and 40Ar/39Ar single crystal dating). These data will allow determination of the magnitude of eruptions, their distribution in time and space, regional correlation and correlation with, and between, drill sites and mass flux into the lake through time. Major goals include short and long-term climate impacts as reflected in paleosols separating major tephra units and paleowind directions. Temporal and dynamic reconstruction of volcanic mass transfer (Plinian fallout, pyroclastic flows, flank collapses and tsunamis resulting from sudden mass impact onto the lake) will help to assess hazard and risk for the populated areas bordering Lake Van, an area of rapid development in Turkey.

总体目标是对过去 500 年前构造和火山活动高度活跃、火山边界的湖泊封闭盆地进行时间、地球动力学和环境重建，内姆鲁特和苏潘 - 碱性湖凡（安纳托利亚）系统的耦合。将通过分析陆地上大型爆炸物喷发的沉积物并通过可用的短岩芯进行研究，为广泛分布的主要爆炸物的火山岩钻探项目做准备（2010）。两座火山的火山事件（沉降物和流动沉积物）将在现场和实验室通过结构、质地、成分和物理年龄测定（XRF、EMP、玻璃和斑晶的激光-ICP-MS以及40Ar/39Ar单晶测年）进行分析这些数据将允许确定喷发的强度、它们在时间和空间上的分布、区域相关性以及钻探地点之间的相关性以及随时间进入湖中的质量通量。分离主要火山灰单元和古风方向的古土壤所反映的长期气候影响（普林尼式沉降物、火山碎屑流、侧翼塌陷和突然对湖泊造成的海啸）将有助于评估。凡湖周边人口稠密地区的危害和风险，该地区是土耳其快速发展的地区。