Unveiling the lithospheric cradle of the Antarctic ice sheet and dynamic topography effects

该项目旨在通过产生与大规模构造和地球动力学过程有关的地壳和岩石圈结构的新的组合势场、地震学和岩石学模型以及与地幔动力学有关的动态地形的时空演变模型来改变我们对南极大陆的现有知识。通过对岩石圈进行分析和建模，我们预计南极洲和全球超大陆旋回之间也会出现新的联系。该项目将有助于限制岩石圈对古地形演变的影响，并将有助于量化可能影响南极冰盖动态的关键地质边界条件，如地热通量。最后，我们期望对地幔对基岩地形的影响有新的看法。学生将致力于对最近国际南极地球物理数据汇编的数据进行分析和建模。其中包括对AntGG重力和Admap磁力数据汇编的更新。卫星重力梯度和卫星磁异常数据集也将用于新的岩石圈尺度模拟工作。潜在的实地数据解释将依赖于开发新的地壳和岩石圈结构和组成的2D和3D模型，这些模型将首次与现有的最新独立地震学约束条件以及岩石学和热模拟工作相结合。学生还将利用地震学和地幔流动模型并分析冰下地形，以帮助开发动态地形效应的新重建努力。

This project aims to transform our current knowledge of the Antarctic continent, by producing novel combined potential field, seismological and petrological models of crustal and lithospheric architecture in relation to large scale tectonic and geodynamic processes and models of the space-time evolution of dynamic topography linked to mantle dynamics. By analysing and modelling the lithosphere, we expect new linkages between Antarctica and the global supercontinent cycles to also emerge. The project will help constrain lithospheric influences on the evolution of paleotopography, and will help quantify key geological boundary conditions -such as geothermal heat flux- that can influence Antarctic ice sheet dynamics. And finally we anticipate new views into mantle effects on bedrock topography.The student will work on the analyses and modelling of data from recent international Antarctic-wide geophysical data compilations. These include updates to the AntGG gravity and ADMAP magnetic data compilations. Satellite gravity gradient and satellite magnetic anomaly datasets will also be used in new lithospheric-scale modelling efforts. The potential field data interpretation will rely on the development of new 2D and 3D models of crustal and lithospheric architecture and composition that will be integrated for the first time with the latest independent seismological constraints available and with petrological and thermal modelling efforts. The student will also utilise seismological and mantle flow models and analyse subglacial topography to aid the development of new reconstruction efforts of dynamic topography effects.