The Shallow Structure of the East Pacific Rise near Latitude9 Degrees 30' North

北纬9度30附近东太平洋海隆的浅层结构

• 批准号: 8917750
• 负责人: G. Michael Purdy
• 金额: $ 49.91万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-04-01 至 1993-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8917750&HistoricalAwards=false
• 关键词: Shallow; Structure; East; Pacific; Rise

The nature of the shallow oceanic crust produced at seafloor spreading centers is poorly constrained by available geophysical data. Recent studies suggest that the shallowest layers of the crust are characterized by extremely low seismic velocities, but that the velocity increases rapidly with depth. Understanding the processes that control these variations are important in determining the porosity of the crust, alteration of crustal rock, and the local and regional significance of crustal drilling data. The present award will support a near bottom refraction study of a segment of the East Pacific Rise in the eastern equatorial Pacific. The project will allow a detailed study of the shallow crust by using both a receiver and acoustic source deployed at the seafloor. This technique will provide a higher resolution study than is available from normal surface ship observations. Data from the experiment will be compared to drilling results which are planned along this same section of ridge. The principal investigators on this project have distinguished records in both experimental and theoretical analysis of crustal data.

海底产生的浅洋壳的性质 扩展中心受现有地球物理条件的限制很小 数据最近的研究表明， 地壳的特点是极低的地震速度，但 速度随深度迅速增加。了解 控制这些变化的过程在以下方面很重要： 确定地壳的孔隙度、地壳的蚀变 岩石，以及地壳钻探的局部和区域意义 数据 本奖项将支持近海底折射研究， 东太平洋海隆的一部分，位于赤道东部 太平洋是如此该项目将允许一个浅的详细研究 利用部署在地壳中的接收器和声源， 海底这项技术将提供更高的分辨率 研究比从正常的水面船舶观测。 实验数据将与钻探结果进行比较 它们沿着同一段山脊。校长 该项目的调查人员在这两个方面都有出色的记录， 地壳数据的实验和理论分析。