High-Resolution Shear-Wave Logging in Deep-Sea Drill Holes: Implications for Evolution of the Ocean Crust

深海钻孔中的高分辨率剪切波测井：对洋壳演化的影响

• 批准号: 9017509
• 负责人: David Goldberg
• 金额: $ 13.44万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-12-01 至 1993-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9017509&HistoricalAwards=false
• 关键词: Resolution; Shear; Wave; Logging; Deep

Measurements of acoustic wave propagation beneath the seafloor provide critical data for understanding the physical properties of marine sediments and crustal rock. Such information can be used to examine the composition and alteration of such material. Historically, most studies investigating the acoustic properties have used either seismic or laboratory techniques. Although useful, such data is often inaccurate for extrapolating to significant depth in the sea-floor. With the advent of sonic logging in the Ocean Drilling Program, some high-resolution acoustic data has become available. Because of the complexity of lithology, structure, geometry and available equipment, most measurements have only been able to determine compressional wave variations. The present project would adapt and modify for use on the JOIDES Resolution available industry equipment for measuring shear wave velocities and waveforms. This in situ data can be combined with routinely measured compressional velocities to completely characterize the acoustic properties of drilled sediments. The principal investigator is a promising young scientist who is fully qualified to undertake the proposed project. This award represents his first NSF research support.

海底下声波传播的测量 为理解物理性质提供关键数据 由海洋沉积物和地壳岩石组成。这样的信息可以 用来检查这种物质的成分和变化。 从历史上看，大多数研究声学特性的研究 使用了地震或实验室技术。虽然 有用的，这些数据往往是不准确的外推， 在海底的深度。随着索尼克的出现 在大洋钻探计划中，一些高分辨率的 声学数据已经可用。的复杂性 岩性、结构、几何形状和可用设备， 测量只能确定压缩波 变化. 本项目将进行调整和修改，以供在JOIDES上使用 测量剪切波的分辨率可用工业设备 速度和波形。该现场数据可以与 常规测量的压缩速度， 描述钻探沉积物的声学特性。的 首席研究员是一位有前途的年轻科学家， 完全有资格承担拟议的项目。这个奖项 这是他第一次获得NSF的研究支持。