Imaging and characterization of rifted continental margin structures using geophysical methods: seeking deeper constraints and their tectonic implications

加拿大在东海岸和北极的潜艇边界以大陆边缘断裂为特征，这是现代海洋开放的产物。尽管由于拥有大量的能源储备，这些边缘地区在领土和经济上都很重要，但这些边缘地区仍未得到充分开发，形成它们的过程也没有得到充分了解。裂谷大陆边缘一般分为岩浆丰富/火山边缘和岩浆贫乏/非火山边缘。加拿大东海岸拥有这两种类型的边缘以及它们之间的过渡，为研究裂谷过程以及它们如何沿着裂谷大陆边缘变化提供了一个天然的实验室。通过将海洋重新拼接在一起来研究共轭边缘的匹配程度，不对称是如何发展的，以及这些不对称是否在海洋开放之前很久就存在了，也可以获得深刻的见解。这些裂陷过程对随后的沉积物沉积和盆地演化具有深远的影响，因此，更好地了解其下方的地壳变异性可以降低勘探风险和成本。

Canada’s submarine limits on the East Coast and in the Arctic are characterized by rifted continental margins, the products of the opening of modern oceans. Despite their territorial and economic importance due to hosting significant energy reserves, these margins remain largely underexplored and the processes that created them are not fully understood. Rifted continental margins are generally classified as magma-rich/volcanic margins or magma-poor/non-volcanic margins. Canada’s East Coast hosts both types of margins as well as the transitions between them, providing a natural laboratory for studying rifting processes and how they vary along a rifted continental margin. Great insight can also be obtained by stitching the oceans back together to study how well the conjugate margins match, how asymmetries develop, and whether those asymmetries existed long before the oceans opened. These rifting processes have a profound impact on subsequent sediment deposition and basin evolution, such that developing a better understanding of the crustal variability beneath them can reduce exploration risk and cost.