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

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。 该项目的重点是西经91度至98度之间的加拉帕戈斯扩张中心。 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。

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.