Uplift History of the Transantarctic Mountains in Northern Victoria Land

本项目利用磷灰石裂变径迹分析，研究了南极洲北维多利亚地（NVL）的南极横贯山脉（TAM）的隆起历史。该项目将试图确认在Admiralty Mountains记录了白垩纪中期的隆起事件，NVL的大部分隆起是在新生代早期开始的，以及在东南沿海地区是否可以描绘出较晚的隆起，即古近纪早期，据估计约有10公里的隆起。结果将把NVL的后侏罗世构造演化与澳大利亚和南极洲的分裂以及罗斯海湾内伸展特征的形成联系起来。采样策略是在金钟山脉和东南沿海地区内陆边缘的花岗岩岩体上取垂直剖面，以及水平样带。磷灰石将从返回的样品中分离出来，并在亚利桑那州立大学裂变径迹测年实验室通过外部探测器方法进行计数处理。轨道长度研究也是分析的一个组成部分。

This project addresses the uplift history of the Transantarctic Mountains (TAM) in Northern Victoria Land (NVL), Antarctica, using apatite fission track analysis. The project will attempt to confirm that a mid-Cretaceous uplift event is recorded in the Admiralty Mountains, that most of the uplift in NVL was initiated in the early Cenozoic and whether a later period of uplift, early Paleogene, can be delineated in the south east coastal region where some 10km of uplift is estimated. Results will place the post-Jurassic tectonic evolution of NVL in context with the break-up of Australia and Antarctica and the formation of extensional features within the Ross Embayment. The sampling strategy is to take vertical profiles from granite plutons in the Admiralty Mountains and on the inland edge of the south east coastal region, as well as a horizontal transect. Apatite will be separated from returned samples and processed for counting by the external detector method in the Fission Track Dating Laboratory at Arizona State University. Track-length studies also form an integral part of the analysis.