Collaborative, RUI: Plume-Ridge Interaction in the Northern Galapagos: Understanding mantle-lithosphere dynamics through geochemistry, geophysical mapping, and gravity modeling

RUI 协作：加拉帕戈斯北部的羽流-山脊相互作用：通过地球化学、地球物理测绘和重力建模了解地幔-岩石圈动力学

• 批准号: 0926637
• 负责人: Daniel Fornari
• 金额: $ 38.42万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0926637&HistoricalAwards=false
• 关键词: Collaborative; RUI; Plume; Ridge; Interaction

Mantle plumes are thought to be responsible for creating ocean archipelagos including Hawaii, Easter, and Galápagos. Similarly, mid-ocean ridges are an essential driving force in plate tectonics. The Galápagos Archipelago is one of the few places on the planet where mantle plumes and mid-ocean ridges interact, providing a rare opportunity to improve our understanding of Earth's important dynamic processes. This research develops a multi-disciplinary perspective on plume-ridge magmatic and tectonic interaction using geophysical data and geochemical analysis of rocks collected from the seafloor. Work includes carrying out a detailed bathymetric and gravity survey of the North Galapagos seafloor. Deep-sea camera traverses and rock dredging also provide essential data to resolve seafloor structural fabric and information about the crust and upper mantle. Geochemical analyses of collected lavas provide essential information for determining mechanisms by which plume material is transported between the archipelago and the mid-ocean ridge. This project is a fully integrated research and teaching collaboration between undergraduate (Colgate University) and research institutions (Woods Hole Oceanographic Institution, University of Idaho). Undergraduates participate fully in the project including the cruise and subsequent extended research projects during which they develop cutting edge analytical skills and present their work at international conferences. Broader impacts also include post-doctoral fellow support and training of students from Ecuador and marine biologists from the Charles Darwin Research Station, the primary institution responsible for conservation and research in the archipelago. Impacts of the work will assist in ongoing conservation efforts in the Galapagos.

地幔柱被认为是创造包括夏威夷、复活节岛和加拉帕戈斯群岛在内的海洋群岛的原因。同样，大洋中脊是板块构造的一个重要驱动力。加拉帕戈斯群岛是地球上少数几个地幔柱和洋中脊相互作用的地方之一，为我们提供了一个难得的机会，以提高我们对地球重要动态过程的理解。本研究利用从海底采集的岩石的地球物理数据和地球化学分析，对地幔柱-洋脊岩浆和构造相互作用进行了多学科的研究。工作包括对北加拉帕戈斯海底进行详细的测深和重力测量。深海摄影勘测和岩石挖掘还提供了基本数据，以解析海底结构组构以及关于地壳和上地幔的信息。对收集到的熔岩进行的地球化学分析提供了重要的信息，有助于确定羽流物质在群岛和大洋中脊之间的迁移机制。该项目是本科生（高露洁大学）和研究机构（伍兹霍尔海洋学研究所，爱达荷州大学）之间完全整合的研究和教学合作。本科生充分参与该项目，包括巡航和随后的扩展研究项目，在此期间，他们开发尖端的分析技能，并在国际会议上展示他们的工作。更广泛的影响还包括为厄瓜多尔的学生和负责群岛养护和研究的主要机构查尔斯达尔文研究站的海洋生物学家提供博士后研究员支助和培训。这项工作的影响将有助于加拉帕戈斯正在进行的保护工作。