Hotspot-Ridge Interaction: Shaping the Geometry of Mid-Ocean Ridges

摘要 该项目是对与热点-脊相互作用相关的岩石圈动力学的研究。 目的是量化羽流引起的力对岩石圈应力的影响。 这部分研究将探讨与热点-山脊相互作用相关的火山地貌的起源以及与裂谷带重新定位的可能联系。 第二个目标是预测山脊迁移。 初步分析表明，地幔柱抬升和剪切可能不足以单独破坏岩石圈，因此预计关键因素包括岩石圈的弱点和与地幔柱岩浆作用相关的质量通量。 第三个目标是解决与分段脊的几何演化相关的问题。 预测将与各种地球物理数据集进行比较，以测试和约束模型的各个方面。

Abstract This project is a study of the lithospheric dynamics associated with hotspot-ridge interactions. The objective is to quantify the effects of plume-induced forces on stresses in the lithosphere. This part of the study will address the origin of the volcanic lineaments associated with hotspot-ridge interactions and the possible connections with rift zone relocations. The second objective is to predict a ridge relocation. Preliminary analyses suggest plume uplift and shear probably are insufficient to break the lithosphere alone, therefore it is anticipated that critical factors include lithospheric weakness and mass flux associated with mantle plume magmatism. The third objective will be to address questions related to the geometric evolution of segmented ridges. Predictions will be compared with a variety of geophysical data sets to test and constrain various aspects of the models.