Seismic Investigation of Sediment Stratigraphy Beneath the East Antarctic Ice Cap

9220462汤普森：该奖项支持美国-新西兰联合开展的南极冰盖下从横贯南极山脉到威尔克斯冰下盆地的沉积物地层调查的美国部分。科学目标是：1)通过成像横贯北极山脉西侧的地层结构来测试横贯北极山脉的隆起模型，并为其提供约束；2)通过确定东南极冰盖下这一单元的地理范围来约束费勒岩浆起源的模型，以便能够评估岩浆活动模型，包括地幔羽流活动与响应区域裂谷而融化的岩浆活动；以及3)通过确定威尔克斯盆地是否包含可能成为天狼星形成物质来源的海洋沉积物，帮助解决关于晚新生代南极东部冰盖气候条件和大小的争论。一种含有上新世硅藻的冰犁，位于横跨北极山脉的许多高海拔地区。***

9220462 THOMPSON This award supports the U.S. portion of a joint U.S. - New Zealand seismic investigation of the sediment stratigraphy beneath the East Antarctic Ice Sheet from the Transantarctic Mountains into the Wilkes Subglacial Basin. The scientific objectives are: 1) to test, and provide constraints for, uplift models of the Transantarctic Mountains by imaging the stratigraphic structure of the west side of the Transantarctic Mountains, 2) to constrain models of the origin of Ferrar magmas by determining the geographic extent of this unit under the East Antarctic Ice Sheet so that models of magmatism, involving mantle plume activity versus melting in response to regional rifting, can be evaluated, and 3) to help resolve the debate about the climatic conditions and size of the East Antarctic Ice Sheet in the late Cenozoic by determining if the Wilkes Basin contains marine sediments that could have been a source of material for the Sirius Formation, a till containing Pliocene diatoms which is located at many high altitude locations in the Transantarctic Mountains. ***