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

为裂谷大陆边缘岩浆活动与伸展活动之间联系的地球动力学模拟研究提供了资金。研究重点是了解洋陆过渡带地壳的构造岩浆史，以及大陆裂谷向稳态海底扩张的过渡过程。PI的初步模拟表明，岩石圈内过程可能是理解火山裂谷边缘与非火山裂谷边缘差异以及海陆过渡时期地壳形成的关键。拟开展的研究将分为三个阶段：建立一系列岩石圈伸展动力学模型；拟动态建模技术的发展，其中简单剪切是运动学近似并利用岩石圈变形模型确定了一个上界条件，用于研究软流圈内对流和熔融过程的一系列模型。来自伊比利亚和大浅滩的共轭边际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.