Seismic Wave Propagation in the Oceanic Crust and Upper Mantle

地震波在洋壳和上地幔中的传播

• 批准号: 0241655
• 负责人: Yang Shen
• 金额: $ 14.6万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-10-01 至 2006-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0241655&HistoricalAwards=false
• 关键词: Seismic; Wave; Propagation; Oceanic; Crust

The PIs will use a new computer code to simulate seismic wave propagation in some characteristic structures of mid-ocean ridges. Full waveform modeling of anisotropic and heterogeneous media will be an essential tool in the planning and interpretation of seismic experiments targeted at mantle structure beneath the oceans. The PIs will investigate the use of ray theory in passive OBS experiments. Predictions of seismic observables will be compared to those obtained of waveform modeling using a pseudo-spectral method. The research will concentrate on three structural features: normal oceanic crust and lithosphere, a mid-ocean ridge and a segmented slow-spreading ridge (where structural wavelengths become smaller than the signal wavelengths).

pi将使用一种新的计算机代码来模拟地震波在大洋中脊的一些特征结构中的传播。各向异性和非均质介质的全波形建模将是规划和解释针对海洋下地幔结构的地震实验的重要工具。pi将研究射线理论在被动OBS实验中的应用。将地震观测数据的预测结果与使用伪谱方法进行波形建模得到的结果进行比较。研究将集中在三个结构特征上：正常的海洋地壳和岩石圈，洋中脊和分段缓慢扩散脊（结构波长小于信号波长）。