气候变化领域集成服务门户(CCPortal): Investigating the role of the Galicia Bank on the formation of the North West Iberian margin using deformable plate tectonic models

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DOI	10.1016/j.tecto.2020.228537
	Investigating the role of the Galicia Bank on the formation of the North West Iberian margin using deformable plate tectonic models
	King M.T.; Welford J.K.; Peace A.L.
发表日期	2020
ISSN	00401951
卷号	789
英文摘要	The kinematic evolution of the West Iberian margin during the opening of the southern North Atlantic has been of interest for several decades and provides a well-constrained environment to study and develop new concepts related to the formation of non-volcanic (magma poor) passive margins. Building upon previous rigid and deformable plate tectonic modelling studies, the aim of this work is to create deformable plate tectonic models of the West Iberian margin using previously published constraints in GPlates to investigate the role of the Galicia Bank as an independent continental ribbon during deformation of the West Iberian margin from 200 Ma to present day. A comparison of present day crustal thickness results calculated from deformable plate tectonic reconstructions with those obtained from gravity inversion has allowed the plate kinematics of the Galicia Bank relative to the Flemish Cap to be investigated. Additionally, this comparison provided detailed insights into the most probable kinematic scenarios for the Galicia Bank continental ribbon, including its impact on the deformation experienced within the Galicia Interior Basin. Two preferred kinematic models for the Galicia Bank are proposed. One that implies synchronous motion with the Flemish Cap until ~160 Ma after which the Galicia Bank begins to move southward, causing crustal thinning within the Galicia Interior Basin. The other preferred model, despite its discrepancies with gravity inversion results, implies synchronous motion of the Galicia Bank and southeastern Flemish Cap until breakup between the southeastern Newfoundland and Iberian margins initiating ~140 Ma. In addition to the deformation induced by the motion of the Galicia Bank, this study demonstrates the influence of inherited Variscan structures and their impact on rift segmentation experienced within the Galicia Interior Basin. This is inferred through attempts to discretize triangular meshes within regions of deformation in areas where inherited structures have been previously interpreted. © 2020 Elsevier B.V.
关键词	Deformable plate models GPlates Plate tectonics Rifted margins Rifting West Iberian margin
英文关键词	Gravitation; Kinematics; Plates (structural components); Structural geology; Tectonics; Crustal thickness; Crustal thinning; Deformable plates; Gravity inversions; Kinematic evolution; Modelling studies; Synchronous motion; Triangular meshes; Deformation; continental breakup; crustal thickness; deformation; Hercynian orogeny; passive margin; plate tectonics; rift zone; tectonic reconstruction; Atlantic Ocean; Canada; Flemish Cap; Galicia Bank; Iberian Margin; Newfoundland; Newfoundland and Labrador
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207791
作者单位	Department of Earth Science, Memorial University of Newfoundland, St. John's, NL A1B 3X5, Canada; School of Earth, Environment and Society, McMaster University, Hamilton, ON L8S 4K1, Canada
推荐引用方式 GB/T 7714	King M.T.,Welford J.K.,Peace A.L.. Investigating the role of the Galicia Bank on the formation of the North West Iberian margin using deformable plate tectonic models[J],2020,789.
APA	King M.T.,Welford J.K.,&Peace A.L..(2020).Investigating the role of the Galicia Bank on the formation of the North West Iberian margin using deformable plate tectonic models.Tectonophysics,789.
MLA	King M.T.,et al."Investigating the role of the Galicia Bank on the formation of the North West Iberian margin using deformable plate tectonic models".Tectonophysics 789(2020).