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

总体目标是构造和火山高度活跃，火山边界，封闭湖盆的时间，地球动力学和环境重建。通过分析陆地上的大型爆炸喷发沉积物，并通过可用的短岩心为湖泊钻探项目（2010年）做准备，将研究过去约500 ka内姆鲁特活火山和sansphan -碱性Van湖（安纳托利亚）的系统耦合。将在现场和实验室通过结构、结构、成分和物理年龄测定（XRF、EMP、激光icp - ms对玻璃和斑晶和40Ar/39Ar单晶定年）对两个火山广泛发生的主要火山爆炸事件的Tephra（沉降物和流动沉积物）进行分析。这些数据将有助于确定喷发的规模、它们在时间和空间上的分布、区域相关性、与钻孔点之间的相关性以及随时间进入湖泊的物质通量。主要目标包括短期和长期气候影响，这反映在古土壤中，分离了主要的热层单元和古风向。火山物质转移的时间和动态重建（普林尼沉降物、火山碎屑流、侧面崩塌和突然对湖泊造成的海啸）将有助于评估凡湖附近人口稠密地区的危害和风险，凡湖是土耳其快速发展的地区。

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.