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，本项目利用独特的湖泊沉积记录研究南半球中纬度(52°S)的末次冰期旋回。结果将与海洋和冰芯数据以及模拟结果进行比较，有助于了解全球气候如何相互作用。钻探拉古纳·波特罗克·艾克的沉积物记录，提供了环境和气候变化的独特记录。拉古纳·波特罗克·艾克是位于阿根廷巴塔哥尼亚南部干旱草原上的一个770卡拉的古老马尔湖。国际资助的科学项目的岩心文件、高分辨率岩心录井和存档将是PASADO-CORE的一个主要重点，以及准备一份叠置的复合剖面，供国际合作科学小组进行二次抽样。XRF岩心测井数据与年龄测定、第一批地球化学数据和物理性质相结合，可以在数千年到十年的分辨率上进行定性的气候和环境重建。一些低分辨率的化探数据可以与XRF岩心扫描数据合并，大大提高了化探分析的时间分辨率。总之，这些结果提供了有关湖泊生产力、有机质来源、异地沉积物迁移、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.