Seismic Reflectivity within Atlantis Massif: Examining Alteration Pathways & Extending Velocity Models to Greater Depths

亚特兰蒂斯地块内的地震反射率：检查蚀变路径

• 批准号: 1130709
• 负责人: Alistair Harding
• 金额: $ 31.09万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1130709&HistoricalAwards=false
• 关键词: Seismic; Reflectivity; within; Atlantis; Massif

The lead PI has been working on th inversion of the refraction arrivals from all multi-channel seismic data from Atlantis Massif which is now complete. They are funded to incorporate these velocity models of the shallow crust in a re-examination of the reflectivity, extending the prior MCS analyses by other investigators. There are reflectors within the Oceanic Core Complex at Atlantis Massif at depths below the paths of the refracted waves. Incorporating these events in new tomographic inversions will extend current models into the core of the massif. The PIs also hope that the study will advance knowledge beyond current depths and will determine what type of experiment(s) can obtain seismic constraints across the full depth range necessary to truly test the models.Broader Impacts include postdoctoral training, enhancing the outcomes of IODP drilling investments in igneous oceanic lithosphere, and development/sharing of tools for seismic analysis of shallow lithospheric structure. The work will also support two current IODP proposals under consideration for scheduling. Insights obtained on the seismic properties of intrusive ocean crust may feed into research/planning for a deep crustal and mantle penetration (MoHole) by the next ocean drilling program.

PI组长一直在进行亚特兰蒂斯地块所有多道地震数据的折射波到达反演工作，现已完成。他们得到资助，将这些速度模型的浅地壳的反射率重新检查，扩展以前的MCS分析由其他调查。在亚特兰蒂斯地块的海洋核心复合体内，折射波路径下方的深度处有反射器。将这些事件纳入新的层析反演将把当前的模型扩展到地块的核心。PI还希望该研究将推动知识超越目前的深度，并将确定什么类型的实验可以获得地震约束在整个深度范围内所需的真正测试models.Broader影响包括博士后培训，提高在火成岩海洋岩石圈的IODP钻探投资的成果，并开发/共享工具的地震分析浅岩石圈结构。这项工作还将支持目前正在审议的两项IODP提案。对侵入性洋壳的地震特性的了解可能有助于下一个海洋钻探计划进行深地壳和地幔穿透（MoHole）的研究/规划。