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

使用地球物理方法对裂谷大陆边缘结构进行成像和表征：寻求更深层次的约束及其构造意义

• 批准号: RGPIN-2017-04258
• 负责人: Welford, JKim
• 金额: $ 1.68万
• 依托单位: Memorial University of Newfoundland
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=633783
• 关键词: Imaging; characterization; rifted; continental; margin

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.

加拿大在东海岸和北极的潜艇限制的特征是裂开的连续边缘，这是现代海洋开放的产物。尽管由于拥有大量的能源储量，它们的领土和经济重要性，但这些利润率在很大程度上没有被忽视，并且创造它们的过程尚未完全理解。裂痕连续边缘通常被归类为富含岩浆/岩浆/贫民区/非沃尔代面边缘。加拿大的东海岸拥有两种类型的利润以及它们之间的过渡，为研究成熟过程以及它们如何随着撕裂的连续利润而变化提供了自然实验室。也可以通过将海洋拼接在一起以研究共轭边缘匹配的效果，不对称的发展以及这些不对称性是否在海洋开放之前是否存在。这些成熟过程对随后的序列沉积物沉积和盆地的演变产生了深远的影响，以使对它们下面的地壳变异性有更好的了解可以降低勘探风险和成本。