Collaborative Research: Integrated Petrological, Geophysical, and Numerical Modeling Constraints on Crustal and Mantle Processes along the Galapagos Spreading Center

合作研究：加拉帕戈斯扩张中心沿地壳和地幔过程的综合岩石学、地球物理和数值模拟约束

• 批准号: 0327051
• 负责人: John Sinton
• 金额: --
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-01-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0327051&HistoricalAwards=false
• 关键词: Collaborative; Research; Integrated; Petrological; Geophysical

This is a continuation of an integrated, multi-disciplinary project combining seismic, petrologic, geochemical, and numerical modeling. The project focuses on the Galapagos spreading center between 91 and 98 degrees west. The initial work provided the first complete multibeam bathymetry of the axial region, quantified variations in crustal thickness, determined the distribution of seismic reflectors from the top of crustal magma reservoirs, defined along-axis variations in geochemistry, and modeled these variations in terms of mantle source enrichment and extent of partial melting. The objectives of the continuation are to refine models of the relationship between axial thermal structure and axial morphology, combine seismic and petrologic observations to constrain variations in magma reservoir properties, and integrate seismic constraints with new measurement of U-series disequilibria to constrain variations in mantle upwelling rate, temperature and source composition.

这是一个综合的，多学科的项目相结合的地震，岩石学，地球化学和数值模拟的延续。 该项目的重点是加拉帕戈斯在西经91度至98度之间的传播中心。 最初的工作提供了第一个完整的多波束测深的轴向区域，量化的地壳厚度的变化，确定地震反射的分布从顶部的地壳岩浆水库，定义沿轴向的变化在地球化学，并模拟这些变化的地幔源富集和部分熔融的程度。 延拓的目标是完善轴向热结构和轴向形态之间关系的模型，联合收割机结合地震和岩石学观测，以限制岩浆储层性质的变化，并将地震限制与U系列不平衡的新测量结合起来，以限制地幔上涌速率、温度和源成分的变化。