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

总体目标是对一个构造和火山高度活跃、火山环绕的封闭湖盆进行时间、地球动力和环境重建。耦合系统的活火山Nemrut和Süphan -碱性湖货车（安纳托利亚）在过去c.将通过分析陆地上的大型爆炸性喷发沉积物和通过现有的短岩心进行研究，为湖泊钻探项目（2010年）做准备。将在现场和实验室通过结构、结构、成分和物理年龄测定（玻璃和斑晶的XRF、EMP、激光-ICP-MS和40 Ar/39 Ar单晶定年）对两座火山（沉降物和流动沉积物）广泛发生的主要爆发性火山事件的火山碎屑进行分析。这些数据将有助于确定喷发的规模、喷发在时间和空间上的分布、区域相关性、与钻探地点的相关性以及钻探地点之间的相关性，以及随着时间推移流入湖中的物质流量。主要目标包括短期和长期的气候影响，反映在古土壤分离主要火山灰单位和古风向。对火山物质转移（普林尼沉降物、火山碎屑流、侧翼塌陷和突然对湖的大规模撞击造成的海啸）进行时间和动态重建，将有助于评估土耳其迅速发展的货车湖沿岸人口稠密地区的危害和风险。

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.