Seismic Investigation of Lithospheric Flexure Within the Ross Embayment, Antarctica

这项研究是对与南极洲年轻的罗斯群岛有关的载荷引起的岩石圈挠曲的地震研究。这项研究包括采集罗斯群岛附近冰架上50公里长的多道地震反射线和垂直于多道地震线的广角反射剖面。这项研究是斯坦福大学和新西兰科学与工业研究部(DSIR)的科学家联合开展的项目。主要目标是利用这一难得的机会研究与大陆岩石圈上部署的孤立、大和易于测量的火山载荷相关的挠曲。扩张的大陆岩石圈的强度是一个相当有争议的话题，对这些地区的地温、成分和流变性以及充填沉积物的地层学都有影响。第二个目标是调查成功成像厚(几百米)漂浮冰架(如罗斯冰架)下的沉积和地壳结构所需的野外和处理参数。

This investigation is a seismic study of lithospheric flexure induced by the loading associated with the geologically young Ross Archipelago, Antarctica. The study involves acquisition of both a 50km-long multichannel seismic reflection line on the ice shelf, adjacent to Ross Archipelago, and a wide-angle reflection profile perpendicular to the multichannel seismic line. This study is a joint project between scientists from Stanford University and the Department of Scientific and Industrial Research (DSIR) in New Zealand. The principal objective is to take advantage of the rare opportunity to study flexure associated with a well isolated, large, and easy to measure volcanic load emplaced on continental lithosphere. The strength of an extended continental lithosphere is a topic of considerable debate, with implications for the geotherm, composition and rheology of such regions, as well as the stratigraphy of the infilling sediments. A second objective is to investigate field and processing parameters necessary for a successful imaging of the sedimentary and crustal structure underlying a thick (several hundred meters) floating ice shelf, such as the Ross Ice Shelf.