Collaborative Research: TAMARA: Transantarctic Mountains Aerogeophysical Research Activities

威尔逊：OPP 9615639贝尔：OPP 9615773芬兰人：OPP 9618568摘要该奖项支持对南极洲维多利亚州南部的横贯北极山脉()的结构进行调查。将绘制-西南极裂谷系边界关键部分的区域架构图，以帮助解决关于南维多利亚大陆演化的悬而未决的问题。这项合作研究计划将把新的航磁数据与卫星图像、地质和构造制图以及现有的地面、航空和海洋地球物理数据整合在一起，这些数据将由美国和德国的合作野外行动获得。这个综合数据库将用于绘制及邻近冰盖地区地壳的大比例尺结构元素图。该项目将为维多利亚州南部的裂谷容纳带产生第一个大型结构框架。该框架将被用来检验关于裂谷侧翼的几何学、裂谷边界的运动学和动力学历史、侏罗纪和新生代裂谷发育期间的岩浆作用模式、早古生代会聚罗斯造山带边缘的几何学以及这一祖先边缘在中新生代裂谷边缘发育中的作用等假说。这些问题的解决将大大有助于了解该地区的构造发展。

Wilson: OPP 9615639 Bell: OPP 9615773 Finn: OPP 9618568 Abstract This award supports an investigation of the structure of the Transantarctic Mountains (TAM) in southern Victoria Land, Antarctica. The regional architecture of a key segment of the TAM - West Antarctic rift system boundary will be mapped to help resolve outstanding questions about the evolution of the TAM in southern Victoria Land. This collaborative research program will integrate new aeromagnetic data, to be acquired by a cooperative U.S.-German field campaign, with satellite imagery, geological and structural mapping, and existing ground-based, airborne, and marine geophysical data. This integrated data base will be used to map large-scale structural elements of the crust of the TAM and adjacent ice-covered regions. The first large-scale structural framework for the TAM rift accommodation zone in southern Victoria Land will be generated by this program. This framework will be used to test hypotheses for the geometry of the TAM rift flank, the kinematic and dynamic history of the rift boundary, the patterns of magmatism during Jurassic and Cenozoic rift development, the geometry of the early Paleozoic convergent Ross orogen margin, and the role of this ancestral margin in Mesozoic-Cenozoic rift-flank development. Resolution of these issues will contribute significantly to understanding the tectonic development of the region.