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

首席PI一直致力于亚特兰蒂斯地块所有多通道地震数据的折射到达反演，该反演现已完成。他们得到资助，将这些浅层地壳的速度模型与反射率的重新检查结合起来，扩展其他研究人员先前的MCS分析。在亚特兰蒂斯地块的海洋核心复合体中，在折射波路径的深处有反射器。将这些事件整合到新的层析反演中，将把当前的模型扩展到地块的核心。pi还希望这项研究能够超越当前深度，并确定哪种类型的实验可以在真正测试模型所需的整个深度范围内获得地震约束。更广泛的影响包括博士后培训，加强火成岩海洋岩石圈IODP钻探投资的成果，以及开发/共享浅层岩石圈结构地震分析工具。这项工作还将支持目前正在考虑安排的两项IODP提案。对侵入性海洋地壳地震特性的深入了解，可能会为下一个海洋钻探项目的深部地壳和地幔穿透（MoHole）研究/规划提供依据。

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.