A Pilot Multichannel Seismic Investigation of Crustal Structure Beneath the Slow Spreading Mid-Atlantic Ridge

对缓慢扩张的大西洋中脊下方地壳结构的试点多道地震调查

• 批准号: 9401717
• 负责人: Robert Detrick
• 金额: $ 19.5万
• 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: 1996
• 资助国家: 美国
• 起止时间: 1996-09-01 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9401717&HistoricalAwards=false
• 关键词: Pilot; Multichannel; Seismic; Investigation; Crustal

OCE-9401717 The geological structure of the oceanic crust is typically inferred from marine geophysical studies. Multichannel seismic techniques have been used with great success to study the crustal structure at fast spreading centers where the seafloor is relatively flat and in locations where the seafloor is covered by thick sediments. The rough seafloor topography and large seismic velocity gradients typically found at slow spreading centers such as the Mid-Atlantic Ridge have limited the success of studies to determine crustal structure in these regions. Seismic processing techniques have been developed, at least in theory, to address these problems. If the processing techniques described in the proposal are successful, it should be possible to address a host of fundamental geological problems at slow and intermediate spreading ridges.

海洋地壳的地质构造通常是从海洋地球物理研究中推断出来的。多道地震技术已被成功地用于研究海底相对平坦的快速扩张中心和海底被厚沉积物覆盖的地区的地壳结构。在缓慢扩张的中心，如大西洋中脊，通常会发现粗糙的海底地形和大的地震速度梯度，这限制了确定这些地区地壳结构的研究的成功。地震处理技术的发展，至少在理论上，是为了解决这些问题。如果提案中描述的处理技术是成功的，它应该有可能解决在缓慢和中等扩张的山脊上的许多基本地质问题。