Imaging Deep Slab Structure Using Shear Waves

使用剪切波对深层板结构进行成像

• 批准号: 9104764
• 负责人: Thorne Lay
• 金额: $ 9.65万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-15 至 1994-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9104764&HistoricalAwards=false
• 关键词: Imaging; Deep; Slab; Structure; Using

This research is to determine the S-wave velocity structure of the subducting Kurile and Japan lithospheric slabs using differential residual sphere procedures. Past studies have concentrated mainly on P-wave velocity structure, and considerable controversy continues about the results, especially whether the slab penetrates the lower mantle. S-waves are more difficult to measure but are now accessible because of advances in instrumentation. S-waves are more sensitive to the thermal and chemical structure of the slab and may help resolve fundamental questions about mantle dynamics.

本研究是利用差分残差球法确定千岛岛和日本岩石圈板块俯冲的横波速度结构。过去的研究主要集中在纵波速度结构上，对结果的争论仍然很大，特别是关于板块是否穿透下地幔。s波更难测量，但由于仪器的进步，现在可以测量了。横波对板块的热和化学结构更敏感，可能有助于解决地幔动力学的基本问题。