Ship-to-shore Seismic Refraction Investigation of the Lithospheric Structure of the Transantarctic Mountain Front

横贯南极山前岩石圈结构的船岸地震折射调查

• 批准号: 8722536
• 负责人: Ralph von Frese
• 金额: $ 21.46万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 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: 1988-07-01 至 1990-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8722536&HistoricalAwards=false
• 关键词: Ship; shore; Seismic; Refraction; Investigation

The crustal structure of the Transantarctic Mountains (TAM) reflects significant details concerning the interaction and tectonic histories of East and West Antarctica. Yet, relatively little is known about the lithospheric structure of the TAM. Strong constraints on the lithospheric structure beneath the TAM are needed to discriminate between various models put forth to explain the evolution of TAM uplift. This investigation will use a land-based digital seismic recording array at two location in the TAM to obtain two densely recorded seismic profiles across the TAM Front near Terra Nova Bay and in the Wright Valley. The Bundesanstalt fur Geowissenschaften, Federal Republic of Germany, will provide large marine airgun seismic sources in conjunction with the GANOVEX-V Expedition during the 1988/89 field season. Seismic waveform modeling will be used in conjunction with array processing techniques to derive maximum constraints on TAM lithospheric velocity structure. Seismic results will be integrated with geopotential field data and geochemical data to determine the most appropriate models of TAM structure, composition, and tectonic evolution.

横贯南极山脉()的地壳结构反映了关于南极东部和西部相互作用和构造历史的重要细节。然而，人们对的岩石圈结构知之甚少。为了区分各种解释隆起演化的模型，需要对隆起之下的岩石圈结构进行较强的约束。本次调查将在的两个位置使用陆基数字地震记录阵列，以获得横跨新地湾附近的前锋和莱特山谷的两条密集记录的地震剖面。德意志联邦共和国的Bundesanstalt Fur Geowisenschaften将在1988/89年野战季节与GANOVEX-V探险队一起提供大型海洋气枪震源。地震波形模拟将与阵列处理技术相结合，以求取岩石圈速度结构的最大约束。地震结果将与重力场数据和地球化学数据相结合，以确定最合适的构造、成分和构造演化模式。