Structural geology and tectonic significance of basin-fill sedimentary rocks, of ice-transported boulders therein and of volcanics recovered by ANDRILL cores in the McMurdo Sound region: Implications for the Cenozoic tectonic and clacial/climatic evolutio

南极钻探计划(ANDRILL)将在罗斯冰架麦克默多冰架(MIS)区罗斯岛的一个平台上钻探地层岩心。钻探计划在2006/07赛季进行。主要目标是在罗斯岛火山杂岩加载形成的挠性护城河凹陷中沉积的1.2公里厚的上更新世冰川、陆源、火山和生物沉积序列。钻探地点位于西南极裂谷系统的维多利亚陆盆内。它的西端代表着横贯北极的山脉前缘，这是一个不对称的裂谷肩部，被许多横向和斜向断层分割，自白垩纪以来经历了几个阶段的抬升和剥蚀。主要目标将是分析岩芯中的天然裂缝，重建裂谷作用的运动学和动力学，相关的断裂历史，以及新近纪晚期-近代罗斯海西部的古应力状态。从层序中的盖层测年可望获得绝对的年龄限制。此外，将与岩石学、地质和热年代学团队合作，对岩心中冰运输的地下室巨石到卵石大小的碎屑进行来源研究。这些研究将提供一个与腹地岩石类型相关联的工具，并将有助于确定过去潜在的冰流方向。

The ANtarctic DRILLing Program (ANDRILL) will drill a stratigraphic core from a platform located on Ross Island in the McMurdo Ice Shelf (MIS) sector of the Ross Ice Shelf. Drilling is scheduled for the 2006/07 season. Primary target is a 1.2 km thick succession of Plio-Pleistocene glacimarine, terrigenous, volcanic, and biogenic sediments that were deposited in a flexural moat depression formed by loading of the Ross Island volcanic complex. The drill site is located within the Victoria Land Basin of the West Antarctic Rift System. Its western termination is represented by the Transantarctic Mountains front, an asymmetric rift shoulder that is segmented by numerous transverse and oblique faults and has experienced several phases of uplift and denudation since the Cretaceous. The primary goal will be the analysis of natural fractures in the core and the reconstruction of kinematics and dynamics of rifting, the related faulting history, and palaeostress states in the western Ross Sea in Late Neogene-Recent times. Absolute age constraints are expected from dating tephra horizons within the sequence. Additionally, provenance studies of ice-transported basement boulder-to pebble-size clasts in the cores will be done in collaboration with petrology and geo- and thermochronology teams. These studies will provide a tool for correlation with rock types in the hinterland and will help to identify potential directions of ice flow in the past.