Age of the Last Transgression of the East Antarctic Ice Sheet, Transantarctic Mountains, Southern Victoria Land

9316310 Faure该奖项支持获取干谷地区岩石的暴露年龄，以确定横贯南极山脉最后一次被东南极冰盖覆盖的时间，并帮助解决有关东南极冰盖上新世历史的相互竞争的假设。 该项目将通过测量宇宙射线轰击石英形成的10 Be和26 Al，确定维多利亚地南部横贯南极山脉最高峰峰顶石英暴露的年代。 这些日期的地质解释是基于这样的假设，即维多利亚地南部的最高峰在冰盖最后一次完全海侵期间被覆盖，然后，随着冰层的消退，山脉暴露出来，部分地区从此暴露出来。 因此，通过测量几座山的暴露年龄，该项目将构建一个暴露历史，将被解释为冰盖衰退的记录。 该项目产生的数据将有助于解决有关天狼星形成的争议，并将解决有关南极东部冰盖稳定性的一些问题。 ***

9316310 Faure This award supports acquisition of exposure ages of rocks in the Dry Valleys regions in order to determine when the Transantarctic Mountains were last overridden by the East Antarctic Ice Sheet and to help resolve competing hypotheses about the Pliocene history of the East Antarctic Ice Sheet. This project will date the exposure of quartz on the summits of the highest peaks in the Transantarctic Mountains of southern Victoria Land by measuring 10Be and 26Al which form by cosmic ray bombardment of quartz. The geological interpretation of these dates is based on the assumption that the highest peaks in southern Victoria Land were covered during the last full transgression of the ice sheet and then, as the ice receded, the mountains were exposed and parts have been exposed ever since. Consequently, by measuring exposure ages on the sides of several mountains, this project will construct an exposure history that will be interpreted as a record of ice sheet recession. The dates produced by this project will help to resolve the controversy about the Sirius Formation and will address some questions about the stability of the East Antarctic ice sheet. ***