Three-dimensional geometry and quantification of the sedimentary fill of Lake El'gygytgyn (Chukotka, NE Siberia)

在此基础上，建立了elgygytgyn湖（西伯利亚东北部）湖泊沉积物的三维动画模型。170公里的地震反射剖面和大约。175公里的3.5 kHz高分辨率剖面。与岩心和二维地震剖面的准时信息相比，该模型将是撞击坑湖的第一个三维记录。这将使我们能够更好地了解火山口及其湖泊不对称的起源，并更好地区分沉积效应(a)由于盆地几何形状的变化和(b)由于未来ICDP岩心的古气候变化。此外，未来ICDP岩心之间的详细相关性将通过绘制钻探点之间的反射器来实现。湖内泥石流的发生似乎受古气候变化的驱动，即在气候变暖时期泥石流的发生增加。一个高分辨率的40 ~ 50 m的三维模型将验证这一假设，并有助于建立泥石流发生作为古气候指标。它将进一步让我们更深入地了解陆湖相互作用，从而了解湖泊沉积、冰缘过程和气候变化之间的关系。

An animated three-dimensional model of the lacustrine sediments of Lake El gygytgyn (NE Siberia) will be developed based on approx. 170 km of seismic reflection profiles and approx. 175 km of 3.5 kHz high-resolution profiles. This model will be the first three-dimensional record from the impact crater lake compared to punctual information from cores and to two-dimensional seismic sections. It will allow us to better understand the origin of the asymmetry of the crater and its lake and to better distinguish between sedimentary effects (a) due to the change of basin geometry and (b) due to paleoclimate changes in the future ICDP cores. Furthermore, a detailed correlation between the future ICDP cores will be possible by mapping reflectors between the drillsites. Debris flow occurrence in the lake seems to be driven by paleoclimate changes, i.e. the occurrence is enhanced during periods of warmer climate. A high-resolution three-dimensional model of the upper 40 to 50 m will test this hypothesis and help to establish the debris flows occurrence as paleoclimate indicator. It will further give us a deeper insight into the land-lake interactions and, thus, into the correlation between lake sedimentation, periglacial processes and climate change.