High-resolution qualitative environmental and climatic reconstruction for the last glacial interglacial cycles - the sediment record of the ICDP site Laguna Potrok Aike, Argentina (PASADO-Core)

作为总体目标，该项目侧重于利用独特的湖泊沉积物记录研究南半球中纬度地区（52°S）的最后一次冰期旋回。结果将与海洋和冰芯数据以及模型结果进行比较，并有助于了解全球气候如何相互作用。在阿根廷南部巴塔哥尼亚干草原上的一个770年前的马尔湖——拉古纳波托克湖的沉积物记录钻探，提供了环境和气候变化的独特记录。为国际资助的科学项目提供岩芯文档、高分辨率岩芯测井和存档将是PASADO-Core的一个主要重点，同时还将为国际合作科学团队的子采样准备堆叠复合剖面。XRF岩心测井资料结合年龄测定、第一次地球化学数据和物理性质，可以在几千年到十年的分辨率上进行定性的气候和环境重建。一些低分辨率的地球化学数据可以与XRF岩心扫描数据合并，大大提高了地球化学分析的时间分辨率。总之，这些结果提供了有关湖泊生产力、有机质来源、异地沉积物转移、水文变化和沉积过程的信息，所有这些都与气候强迫有关。

As the overall aim, this project focuses on studying the last glacial cycle of the Southern Hemispheric mid-latitudes (52°S) using a unique lacustrine sediment record. Results will be compared with marine and ice core data as well as with modelling results and help to understand how climate interacts globally. Drilling of the sediment record of Laguna Potrok Aike, a 770 ka old maar lake in the dry steppe of southern Patagonia (Argentina), provides a unique record of environmental and climate variations. Core documentation, high-resolution core logging and archiving for internationally funded science projects will be one major focus of PASADO-Core as well as preparation of a stacked composite profile ready for subsampling by international collaborating science teams. XRF core logging data in combination with age determinations, first geochemical data and physical properties make available qualitative climate and environmental reconstructions at multi-millennial to decadal resolution. Some of the low-resolution geochemical data can be merged with XRF core scanning data to increase the temporal resolution of geochemical analyses considerably. Altogether, these results provide information about lacustrine productivity, origin of organic matter, allochthonous sediment transfer, hydrological variations and sedimentological processes, all of which are related to climatic forcing.