Technomagmatic Processes During Continental Rifting and the Formation and Stucture of the Ocean-Continent Transition on Rifted Continential Margins

提供资金进行断裂大陆边缘岩浆活动与伸展之间联系的地球动力学模拟研究。研究将侧重于了解大洋-大陆过渡带地壳的构造岩浆史以及从大陆裂谷向稳定状态海底扩张的过渡。 PI的初步建模表明，岩石圈内的过程可能是了解火山裂谷边缘和非火山裂谷边缘之间的差异和在海洋-大陆过渡的地壳形成的关键。拟议的研究将在三个阶段扩展研究：开发一系列岩石圈伸展的动力学模型;开发一种准动力学建模技术，其中简单剪切近似运动学;以及应用岩石圈变形模型来确定一个上边界条件，以应用于一系列研究软流圈对流和熔融过程的模型。伊比利亚和大浅滩的共轭利润率数据将用于约束模型。

Funds are provided for a geodynamic modeling study of associations between magmatism and extension on rifted continental margins. The research will focus on understanding the tectonomagmatic history of the crust in the ocean-continent transition zone and the transition from continental rifting to steady state seafloor spreading. Preliminary modeling by the PI suggest that intra-lithospheric processes may be a key to understanding the differences between volcanic rifted margins and non-volcanic rifted margins and the formation of crust at the ocean-continent transition. Proposed research will extend the study in three stages: development of a series of dynamic models of lithospheric extension; development of a quasi-dynamic modeling technique in which simple shear is approximated kinematically; and the application of the models of lithospheric deformation to define an upper boundary condition to be applied to a series of models that investigate convection and melting processes in the asthenosphere. Data from the Iberian and Grand Banks conjugate margins will be use to constrain the models.