Lake Issyk Kul: Neotectonic deformation of (paleo-) shorelines and their link with intermontane basin closure and lake-level fluctuations

吉尔吉斯斯坦北部的伊塞克湖（Lake Issyk Kul）是一个潜在的ICDP钻探地点，用于研究过去几个世纪中亚的气候和侵蚀历史。这一建议的重点是破译湖泊集水区景观中包含的构造信号及其对湖泊沉积过程的影响。关键元素是横跨伊塞克湖的古海岸线。岸线和湖泊沉积物提供了第四纪主要湖泊水位波动的充分证据，并有助于确定与其他盆地的短暂河流连通性和溢流条件，这对于正确评估湖盆变化的环境条件至关重要。重大的历史地震、构造变形地貌、古地震证据和大量的物质运动表明，气候本身并不是湖泊动力学变化的唯一驱动因素，这使得该盆地成为了解构造-沉积过程的理想地点。我的目标是通过遥感和陆地激光雷达扫描来量化海岸线变形，并伴有相关标记层的定年。重要的是，我将专注于盆地关闭和湖泊系统河流连通性变化的事件和机制，记录在西部湖泊出口的地层学和地貌学中。这些数据将有助于更好地了解湖泊的第四纪演化，并对解释从拟议的ICDP岩心中获得的记录至关重要。

Lake Issyk Kul in northern Kyrgyzstan is a potential ICDP drilling site to examine the climatic and erosional history of Central Asia over the past few Myr. This proposal focuses on deciphering the tectonic signals contained in the landscape of the lake catchments and their influence on lacustrine sedimentary processes. Key elements are paleo-shorelines straddling Lake Issyk Kul. Shorelines and lacustrine deposits furnish ample evidence for major lake-level fluctuations during the Quaternary, and help identify transient fluvial connectivity with other basins and overflow conditions, which are paramount for correctly assessing changing environmental conditions in the lake basin. Major historic earthquakes, tectonically deformed landforms, paleoseismological evidence, and voluminous mass movements indicate that climate alone is not the only driver for changes in lake dynamics, making this basin an ideal location to understand linked tectono-sedimentary processes. I aim to quantify shoreline deformation by remote sensing and terrestrial LiDAR-scanning, accompanied by dating of associated marker horizons. Importantly, I will focus on events and mechanisms responsible for basin closure and changes in fluvial connectivity of the lake system, recorded in the stratigraphy and geomorphology of the western lake outlet. These data will help to better understand the Quaternary evolution of the lake and are crucial to interpret the record to be obtained from the proposed ICDP drill core.