Aleutian - Alaska Workshop at Lamont for GeoPrisms Synthesis

该项目将于2019年8月5日至6日在哥伦比亚大学拉蒙特·多尔蒂地球观测站校园举办为期两天的研讨会，以综合阿留申-阿拉斯加俯冲带的研究成果。参与者是从NSF-GeoPRISMS项目（裂谷和俯冲边缘的地球动力学过程）资助的约20个独立项目中抽取的，重点是了解大地震和其他类型断层滑动、危险火山爆发和大陆地壳形成的基本过程。大约50名参与者将聚集在拉蒙特，目的是分享和综合跨学科和跨俯冲带的结果，从进入的板块到大型逆冲构造到火山弧。超过35%的参与者将是职业生涯早期的科学家或研究生，他们将参与正式和非正式的讨论，以建立一个持久的网络。讲习班的主要产出将是综合地球地质科学的出版物，包括综合论文。其他主要产出将是在个别项目之间建立科学联系，否则这些联系将不会发生，这对于实现地球地质系统内焦点地点方法的价值至关重要。阿拉斯加-阿留申边缘是地球地质系统俯冲旋回和变形倡议的重点地点之一。它被选为研究弧火山作用、大陆地壳发育和地震周期上的地震过程的理想地点。自2012财年以来资助的地质科学基金项目涵盖了从大型逆冲构造的变形到大陆的深部构造块，再到从板块到地表的挥发性循环。方法包括实验室变形实验和地球化学分析，以及使用便携式质谱仪、海底应变传感器和阿拉斯加两栖阵列的新型现场部署。这个综合研讨会对于分享初步发现、建立跨项目联系和整合来自阿拉斯加-阿留申重点站点的结果是必要的。研讨会参与者将深入参与多学科讨论（包括地球物理、地球化学、实验和理论方法）。所有的演讲和讨论都将是全体会议，以吸引每个科学主题和方法的问题，结果和争议。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This project will support a two-day workshop at the Lamont Doherty Earth Observatory campus of Columbia University on August 5-6, 2019 in order to synthesize research results from the Aleutian-Alaska Subduction Zone. Participants are drawn from ~ 20 individual projects funded by the NSF-GeoPRISMS Program (Geodynamic Processes at RIfting and Subducting Margins), with a focus on understanding the fundamental processes underlying great earthquakes and other types of fault slip, hazardous volcanic eruptions and the building of the continental crust. Approximately 50 participants will gather at Lamont for the purposes of sharing and synthesizing results across disciplines and across the subduction zone, from the incoming plate through the megathrust to the volcanic arc. Over 35% of the participants will be early-career scientists or graduate students who will be engaged in formal and informal discussions to develop a lasting network. The primary workshop output will be publications, including synthesis papers, that will integrate GeoPRISMS science. The other primary output will be the scientific connections made between individual projects that would not otherwise happen, essential to realizing the value of the focus site approach within GeoPRISMS.The Alaska-Aleutian Margin is one of the focus sites for the GeoPRISMS Subduction Cycles and Deformation Initiative. It was chosen as an ideal location to study arc volcanism, development of continental crust, and earthquake processes over the seismic cycle. GeoPRISMS-NSF projects funded since FY12 span topics ranging from deformation in the megathrust to plutonic building blocks of continents to volatile cycling from slab to surface. Approaches include laboratory deformation experiments and geochemical analyses, and novel field deployments using portable mass spectrometers, seafloor strain sensors, and the Alaska Amphibious Array. This synthesis workshop is necessary to share initial findings, make cross-project connections, and integrate results from the Alaska-Aleutian focus site. Workshop participants will engage deeply in multi-disciplinary discussions (including geophysics, geochemistry, experimental and theoretical approaches). All presentations and discussions will be plenary to entrain everyone in the issues, results and controversies of each science topic and approach.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.