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Interrelations of tectonic deformation and surface erosion with West Antarctic Ice Sheet dynamics

构造变形和地表侵蚀与西南极冰盖动力学的相互关系

基本信息

批准号：
258133812
负责人：
Professor Dr. Karsten Gohl
金额：
--
依托单位：
Fachgebiet Geodynamik der Polargebiete
依托单位国家：
德国
项目类别：
Infrastructure Priority Programmes
财政年份：
2014
资助国家：
德国
起止时间：
2013-12-31 至 2018-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/258133812?language=en
关键词：
Interrelations tectonic deformation surface erosion

项目摘要

West Antarctica, and particularly the Amundsen Sea area, hosts glaciers with the most pronounced mass losses of the whole continent. Complete collapse of the West Antarctic Ice Sheet would result in a global sea level rise of 3 to 5 m. Apart from climatic and oceanographic changes, ice sheets are influenced by the tectonic and structural history as well as by heat flow patterns of the underlying bedrock. This project plan aims for a better understanding of the long-term geodynamic and paleo-topographic evolution of the Amundsen Sea area, of its heat flow distribution, and of its glacial thinning and retreat history. This will be achieved by applying a combination of geophysical methods, thermochronology, and surface exposure dating. Combining these data sets will provide information on spatial and temporal correlations of geodynamic activity, heat flow patterns, and ice sheet evolution. In more general terms, this project will contribute to a better understanding of relations between lithospheric processes, surface processes, and glacial dynamics. The project is based on Polarstern expedition XXX/3 in February-March 2015. During this expedition, the shallow drilling MeBo device will be deployed, enabling the first drilling campaign in the Amundsen Sea. Cored material will include basement rocks and clastic sediments presumably covering the time from the Cretaceous to the present, offering a unique opportunity for studying the evolution of the Amundsen Sea area.

南极洲西部，特别是阿蒙森海地区，拥有整个大陆最明显的质量损失的冰川。南极洲西部冰盖的完全崩溃将导致全球海平面上升3至5米。除了气候和海洋变化，冰盖还受到构造和结构历史以及底层基岩热流模式的影响。该项目计划旨在更好地了解阿蒙森海地区的长期地球动力学和古地形演变、热流分布及其冰川变薄和退缩历史。这将通过应用地球物理方法、热年代学和地表暴露年代测定相结合来实现。结合这些数据集将提供有关地球动力活动、热流模式和冰盖演变的空间和时间相关性的信息。更一般地说，这个项目将有助于更好地了解岩石圈过程，表面过程和冰川动力学之间的关系。该项目基于2015年2月至3月的Polarstern第XXX/3次考察。在这次探险中，将部署浅钻MeBo设备，使阿蒙森海的第一次钻探活动成为可能。取芯材料将包括基底岩石和碎屑沉积物，可能涵盖从白垩纪到现在的时间，为研究阿蒙森海地区的演变提供了一个独特的机会。