The instability of continental passive margins and its effect on continental topography and heat flow. / Armitage, John J.; Jaupart, Claude; Fourel, Loic; Allen, Philip A.

In: Journal of Geophysical Research: Solid Earth, Vol. 118, No. 4, 2013, p. 1817–1836.

Research output: Contribution to journalArticlepeer-review

Published

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The instability of continental passive margins and its effect on continental topography and heat flow. / Armitage, John J.; Jaupart, Claude; Fourel, Loic; Allen, Philip A.

In: Journal of Geophysical Research: Solid Earth, Vol. 118, No. 4, 2013, p. 1817–1836.

Research output: Contribution to journalArticlepeer-review

Harvard

Armitage, JJ, Jaupart, C, Fourel, L & Allen, PA 2013, 'The instability of continental passive margins and its effect on continental topography and heat flow', Journal of Geophysical Research: Solid Earth, vol. 118, no. 4, pp. 1817–1836. https://doi.org/10.1002/jgrb.50097

APA

Armitage, J. J., Jaupart, C., Fourel, L., & Allen, P. A. (2013). The instability of continental passive margins and its effect on continental topography and heat flow. Journal of Geophysical Research: Solid Earth, 118(4), 1817–1836. https://doi.org/10.1002/jgrb.50097

Vancouver

Armitage JJ, Jaupart C, Fourel L, Allen PA. The instability of continental passive margins and its effect on continental topography and heat flow. Journal of Geophysical Research: Solid Earth. 2013;118(4):1817–1836. https://doi.org/10.1002/jgrb.50097

Author

Armitage, John J. ; Jaupart, Claude ; Fourel, Loic ; Allen, Philip A. / The instability of continental passive margins and its effect on continental topography and heat flow. In: Journal of Geophysical Research: Solid Earth. 2013 ; Vol. 118, No. 4. pp. 1817–1836.

BibTeX

@article{15b7c4b0ed83453cacaae525da10a842,
title = "The instability of continental passive margins and its effect on continental topography and heat flow",
abstract = "The long geological history of passive margin evolution is complex yet typified by an initial ramp-like tilting of the subaerial surface toward the continent-ocean boundary, followed by episodic uplift and subsidence at a smaller wavelength. We argue that this behavior is due to changes in margin structure brought about by buoyancy-driven lithospheric flow. Continental lithosphere is melt-depleted, buoyant, and thick. It will resist convective breakdown into the asthenosphere below, but will be prone to lateral flow due to horizontal density contrasts. Changes in lithosphere thickness at the transition between continent and ocean will nucleate convection cells. Using a numerical model of viscous upper mantle flow, we show that stability or instability of the continental lithosphere at a passive margin is a function of the lithospheric rheology and composition. Increased compositional buoyancy leads to oceanward lateral flow of the continental lithosphere whereas decreased buoyancy has the opposite effect, causing landward lateral flow of the continental lithosphere. In model simulations, a continental lithosphere thought typical of Phanerozoic continental platforms experiences first a margin-wide ramp-like tilting, followed by topographic fluctuations due to an evolving array of convection cells in the mantle. The timing and magnitude of predicted changes in topography are similar to those observed at the eastern North American margin, suggesting that the tilting and episodic uplift and subsidence at continental passive margins are a natural consequence of the evolution of continental lithosphere after breakup and during mature seafloor spreading.",
author = "Armitage, {John J.} and Claude Jaupart and Loic Fourel and Allen, {Philip A.}",
year = "2013",
doi = "10.1002/jgrb.50097",
language = "English",
volume = "118",
pages = "1817–1836",
journal = "Journal of Geophysical Research: Solid Earth",
issn = "2169-9313",
publisher = "Wiley-Blackwell",
number = "4",

}

RIS

TY - JOUR

T1 - The instability of continental passive margins and its effect on continental topography and heat flow

AU - Armitage, John J.

AU - Jaupart, Claude

AU - Fourel, Loic

AU - Allen, Philip A.

PY - 2013

Y1 - 2013

N2 - The long geological history of passive margin evolution is complex yet typified by an initial ramp-like tilting of the subaerial surface toward the continent-ocean boundary, followed by episodic uplift and subsidence at a smaller wavelength. We argue that this behavior is due to changes in margin structure brought about by buoyancy-driven lithospheric flow. Continental lithosphere is melt-depleted, buoyant, and thick. It will resist convective breakdown into the asthenosphere below, but will be prone to lateral flow due to horizontal density contrasts. Changes in lithosphere thickness at the transition between continent and ocean will nucleate convection cells. Using a numerical model of viscous upper mantle flow, we show that stability or instability of the continental lithosphere at a passive margin is a function of the lithospheric rheology and composition. Increased compositional buoyancy leads to oceanward lateral flow of the continental lithosphere whereas decreased buoyancy has the opposite effect, causing landward lateral flow of the continental lithosphere. In model simulations, a continental lithosphere thought typical of Phanerozoic continental platforms experiences first a margin-wide ramp-like tilting, followed by topographic fluctuations due to an evolving array of convection cells in the mantle. The timing and magnitude of predicted changes in topography are similar to those observed at the eastern North American margin, suggesting that the tilting and episodic uplift and subsidence at continental passive margins are a natural consequence of the evolution of continental lithosphere after breakup and during mature seafloor spreading.

AB - The long geological history of passive margin evolution is complex yet typified by an initial ramp-like tilting of the subaerial surface toward the continent-ocean boundary, followed by episodic uplift and subsidence at a smaller wavelength. We argue that this behavior is due to changes in margin structure brought about by buoyancy-driven lithospheric flow. Continental lithosphere is melt-depleted, buoyant, and thick. It will resist convective breakdown into the asthenosphere below, but will be prone to lateral flow due to horizontal density contrasts. Changes in lithosphere thickness at the transition between continent and ocean will nucleate convection cells. Using a numerical model of viscous upper mantle flow, we show that stability or instability of the continental lithosphere at a passive margin is a function of the lithospheric rheology and composition. Increased compositional buoyancy leads to oceanward lateral flow of the continental lithosphere whereas decreased buoyancy has the opposite effect, causing landward lateral flow of the continental lithosphere. In model simulations, a continental lithosphere thought typical of Phanerozoic continental platforms experiences first a margin-wide ramp-like tilting, followed by topographic fluctuations due to an evolving array of convection cells in the mantle. The timing and magnitude of predicted changes in topography are similar to those observed at the eastern North American margin, suggesting that the tilting and episodic uplift and subsidence at continental passive margins are a natural consequence of the evolution of continental lithosphere after breakup and during mature seafloor spreading.

U2 - 10.1002/jgrb.50097

DO - 10.1002/jgrb.50097

M3 - Article

VL - 118

SP - 1817

EP - 1836

JO - Journal of Geophysical Research: Solid Earth

JF - Journal of Geophysical Research: Solid Earth

SN - 2169-9313

IS - 4

ER -