Seismic Investigation of Lithospheric Flexure Within the Ross Embayment, Antarctica

南极洲罗斯湾内岩石圈弯曲的地震调查

• 批准号: 8813162
• 负责人: George Thompson
• 金额: $ 9.16万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-15 至 1990-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8813162&HistoricalAwards=false
• 关键词: Seismic; Investigation; Lithospheric; Flexure; Within

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.

本次调查是岩石圈挠曲的地震研究 与地质上年轻的罗斯有关的负荷引起的 南极群岛。 这项研究涉及获得一个 冰架上50公里长的多道地震反射线， 罗斯群岛附近，广角反射剖面 垂直于多道地震测线。 本研究是一项 来自斯坦福大学的科学家和 科学和工业研究部（DSIR） 缤客 主要目的是利用 有机会研究弯曲与一个良好的隔离， 大，易于测量的火山负荷安置在大陆 岩石圈 伸展大陆岩石圈的强度 是一个相当大的辩论的话题， 这些地区的地热、成分和流变性，以及 充填沉积物的地层学 第二个目标是 研究了用于生产 沉积和地壳结构的成功成像 在厚厚的（几百米）浮冰架下， 比如罗斯冰架