Collaborative Research: Oceanic Upper Mantle Structure from Very Large Offset Seismic Refraction Measurements

合作研究：来自超大偏移地震折射测量的海洋上地幔结构

• 批准号: 0002674
• 负责人: John Collins
• 金额: $ 6.84万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-01 至 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0002674&HistoricalAwards=false
• 关键词: Collaborative; Research; Oceanic; Upper; Mantle

This project will investigate the seismic structure of oceanic mantle lithosphere using an active-source seismic refraction experiment along an 800-km-long transect in the Western Atlantic Ocean. The transect extends along a plate kinematic flow line that lies entirely within a single spreading-center segment, on lithosphere ranging from 87 to 145 million years old. The experiment will determine if the lithospheric mantle in the Atlantic is stratified, the magnitude and form of anisotropy over length scales of a few hundred kilometers, the constraints the character of oceanic Pn coda places on the nature of small-scale lateral heterogeneity, and the parameters that maximize the range at which mantle phases can be recorded using airgun source and ocean-bottom receivers.

该项目将利用沿着西大西洋800公里长的样带进行的有源地震折射实验，调查海洋地幔岩石圈的地震结构。 该样带沿着板块运动流线延伸，完全位于一个单一的扩展中心段，岩石圈年龄从87到1.45亿年。 该实验将确定大西洋岩石圈地幔是否分层，几百公里长度尺度上各向异性的大小和形式，海洋Pn尾波特征对小尺度横向不均匀性性质的限制，以及使用气枪源和海底接收器记录地幔相的最大范围的参数。