EarthScope Institute: The Lithosphere-Asthenosphere Boundary

EarthScope 研究所：岩石圈-软流圈边界

• 批准号: 1059661
• 负责人: Anne Tréhu
• 金额: $ 9.39万
• 依托单位: Oregon State University
• 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: 2011-05-01 至 2012-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1059661&HistoricalAwards=false
• 关键词: EarthScope; Institute; Lithosphere; Asthenosphere; Boundary

EarthScope Institute: The Lithosphere-Asthenosphere Boundary The lithosphere is fundamental to the definition of tectonic plates and continents, and yet its dimensions, origins and evolution are still poorly understood. New observations at the interface between the strong lithosphere and weak asthenosphere hold clues as to the thermal, mechanical and chemical variations that create this boundary. Data from the EarthScope Facility have provided a rich array of such observations at the lithosphere-asthenosphere boundary (LAB), some of them conflicting. The variations and discontinuities in seismic velocities, attenuation and anisotropy have led to a proliferation of features and structures that confound the classical view of the lithosphere as a thermal boundary layer. A workshop is being held to bring together seismologists, dynamicists, experimentalists and petrologists to integrate these new observations into a new conceptual understanding of the LAB and to develop new ideas about Earth?s dynamic behavior that give rise to this feature. The primary goals of the workshop are: 1) to provide intellectual leadership and foster critical thinking about the observations that define the LAB and the physical mechanisms behind its origin and evolution; 2) to promote broad, community interest in the LAB and seed collaborations between observational, theoretical, and laboratory based research programs; and 3) to discuss novel approaches or critical data that are needed to make new observations on the LAB and develop models for its origins. This workshop is the initial step in fostering broad, multidisciplinary collaboration on the LAB and will provide the foundation for a virtual online Institute that will be facilitated by the EarthScope National Office.

EarthScope研究所：岩石圈是构造板块和大陆定义的基础，但它的尺寸，起源和演化仍然知之甚少。 在强岩石圈和弱软流圈之间的界面上的新观测为创造这一边界的热、机械和化学变化提供了线索。 来自地球观测仪的数据提供了一系列丰富的岩石圈-软流圈边界（LAB）的观测结果，其中一些相互矛盾。 地震波速度、衰减和各向异性的变化和不连续性导致了特征和结构的扩散，这些特征和结构混淆了岩石圈作为热边界层的经典观点。一个研讨会正在举行，汇集地震学家，动力学家，实验学家和岩石学家，将这些新的观察纳入一个新的概念理解实验室，并发展新的想法，地球？的动态行为，产生了这个功能。研讨会的主要目标是：1）提供知识领导，并培养对定义LAB及其起源和演变背后的物理机制的观察的批判性思维; 2）促进广泛的社区对LAB的兴趣，并在观察，理论和实验室研究计划之间开展合作; 3）讨论对LAB进行新的观察并建立其起源模型所需的新方法或关键数据。该讲习班是促进实验室广泛的多学科合作的第一步，并将为将由地球观测国家办事处提供便利的虚拟在线研究所奠定基础。