Physical properties, climate signals, and structural features of Tertiary sediments in the Southern McMurdo Sound (Antarctica) derived from downhole logging in the ANDRILL-SMS project

在国际南极钻探计划（ANDRILL）的框架下，在南麦克默多湾（罗斯海）钻探了1138米深的岩心井眼SMS。南极新近纪冰盖变化、长期气候演变和麦克默多海峡构造史的研究是该项目的主要目标。德国参与ANDRILL项目的一部分是对SMS井眼进行广泛的地球物理测井。它为解答由大约100名科学家组成的整个项目范围内的许多问题提供了主要基础。通过解释井下测井数据，可以建立完整的岩性测井曲线，描述钻探沉积物的岩石物理特征，确定沉积结构，并获得长达1900万年的古气候条件的证据。钻孔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。通过这种方式，局部结果可以转化为空间信息，从而为了解罗斯海的构造结构做出重要贡献。

In the framework of the international ANtarctic DRILLing program (ANDRILL) the 1138 m deep core borehole SMS was drilled in the Southern McMurdo Sound (Ross Sea). The investigations of Antarctic Neogene ice sheet variations, of long-term climate evolutions and of the tectonic history of McMurdo Sound represent the main project aims. One part of the German participation in the ANDRILL project is the extensive geophysical logging of the SMS borehole. It delivers a main basis for answering a lot of questions in the scope of the whole project consisting of about 100 scientists. Interpreting the downhole logging data permits among other things to establish a complete lithological log, to characterize the drilled sediments petrophysically, to determine sedimentary structures and to get evidence about palaeoclimatic conditions during up to 19 Mio years. Seismic experiments in the borehole allow linking detailed geological information with shipborne seismic sections. This way, local results can be transformed into spatial information thus providing an important contribution to the understanding of the tectonic structure of the Ross Sea.