Bündelantrag PASADO: "Physical properties, structural features, and climate signals in lake sediments and diatrem breccias of the ICDP site Laguna Potrok Aike (Argentina) derived from downhole logging (PASADO-Downhole)"

在ICDP项目Pasado的框架内，将在拉古纳波特罗克艾克(阿根廷)进行深达600米的钻探。该项目旨在研究南半球中纬度(52°S)最后一次冰川-间冰期旋回期间的环境和气候变化，并加深我们对MAAR构造的熔融岩浆起源的理解。对这些钻孔进行广泛的地球物理井下记录，为回答本项目范围内的问题奠定了基础。通过对井下测井资料的解释，可以建立完整的岩性测井资料，对钻探的沉积物和火山岩进行岩石物理特征分析，确定沉积构造，并获得有关770ka以来古气候条件的证据。井中的地震实验可以将详细的地质信息与船载地震剖面联系起来。因此，可以将局部结果转换为空间信息，为了解该地区的沉积学模式和构造结构做出重要贡献。

In the framework of the ICDP project PASADO up to 600 m deep drillings will be carried out at Laguna Potrok Aike (Argentina). The project aims at studying environmental and climate variations during the last glacial-to-interglacial cycles for the mid-latitudes (52°S) of the Southern Hemisphere and to improve our understanding of the phreatomagmatic origin of the maar structure. Extensive geophysical downhole logging of these boreholes delivers a basis for answering questions in the scope of this project. Interpreting the downhole logging data permits to establish a complete lithological log, to characterize the drilled sediments and volcanics petrophysically, to determine sedimentary structures and to obtain evidences about palaeoclimatic conditions during up to 770 ka. Seismic experiments in the borehole allow linking the detailed geological information with shipborne seismic sections. Thus, local results can be transformed into spatial information providing an important contribution to the understanding of the sedimentological patterns and the tectonic structure of this maar diatrem.