Utilizing Permanent and Temporary Broadband Regional Networks to Refine Seismic Models of the Lower Mantle

利用永久和临时宽带区域网络完善下地幔地震模型

• 批准号: 9706663
• 负责人: Jeroen Ritsema
• 金额: $ 9万
• 依托单位: University of South Carolina at Columbia
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-08-15 至 1999-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9706663&HistoricalAwards=false
• 关键词: Utilizing; Permanent; Temporary; Broadband; Regional

9706663 Ritsema This research involves the use of the expanding data base of high- quality, broad-band digital seismic networks, both permanent and temporary to invert for earth structure in regions previously undersampled, especially the lower mantle. Several source- receiver path geometries provide unique sampling of the lowermost mantle beneath the Indian, South Pacific and Atlantic oceans that cannot be obtained with comparable detail with past seismic station coverage. The construction of seismic models for unmapped regions and the analysis of the full spectrum of length scales over which seismic velocity structure varies in the lower mantle are primary goals. These aspects remain crucial to advancing our understanding of the relation of seismic structure to the thermal and chemical composition of the region, and their influence on dynamical processes near the core-mantle boundary. ***

9706663 RITSEMA这项研究涉及使用扩大的高质量，广泛数字地震网络的数据库，无论是永久还是临时的，都可以在先前采样的区域中倒入地球结构，尤其是下层。 几种来源的接收器路径几何形状提供了印度，南太平洋和大西洋下方最低地幔的独特采样，这些采样无法以相当的细节获得过去的地震车站覆盖。 为未塑形区域的地震模型的构建以及对地震速度结构在下层地震中变化的整个长度尺度的分析是主要目标。 这些方面对于促进我们对地震结构与该区域的热和化学组成的关系以及它们对核心壳边界附近动力学过程的影响仍然至关重要。 ***