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article · Geophysical Research Letters · 2017

Impact of the lithosphere on dynamic topography: Insights from analogue modeling

Andrea Sembroni, Ágnés Király, Claudio Faccenna, Francesca Funiciello, T. W. Becker, Jan Globig, Manel Fernández

Cited by 18Open access

Abstract

Abstract Density anomalies beneath the lithosphere are expected to generate dynamic topography at the Earth's surface due to the induced mantle flow stresses which scale linearly with density anomalies, while the viscosity of the upper mantle is expected to control uplift rates. However, limited attention has been given to the role of the lithosphere. Here we present results from analogue modeling of the interactions between a density anomaly rising in the mantle and the lithosphere in a Newtonian system. We find that, for instabilities with wavelengths of the same order of magnitude as lithosphere thickness, the uplift rate and the geometry of the surface bulge are inversely correlated to the lithosphere thickness. We also show that a layered lithosphere may modulate the topographic signal. With respect to previous approaches our models represent a novel attempt to unravel the way normal stresses generated by mantle flow are transmitted through a rheologically stratified lithosphere and the resulting topographic signal.

Cite this paper

APA 7

Sembroni, A., Király, Á., Faccenna, C., Funiciello, F., Becker, T. W., Globig, J., & Fernández, M. (2017). Impact of the lithosphere on dynamic topography: Insights from analogue modeling. Geophysical Research Letters, 44(6), 2693–2702. https://doi.org/10.1002/2017gl072668

MLA 9

Sembroni, Andrea, et al. “Impact of the lithosphere on dynamic topography: Insights from analogue modeling.” Geophysical Research Letters, vol. 44, no. 6, 2017, pp. 2693–702, https://doi.org/10.1002/2017gl072668.

Chicago

Sembroni, Andrea, Ágnés Király, Claudio Faccenna, Francesca Funiciello, T. W. Becker, Jan Globig, and Manel Fernández. 2017. “Impact of the lithosphere on dynamic topography: Insights from analogue modeling.” Geophysical Research Letters 44 (6): 2693–702. https://doi.org/10.1002/2017gl072668.

Harvard

Sembroni, A. et al. (2017) ‘Impact of the lithosphere on dynamic topography: Insights from analogue modeling’, Geophysical Research Letters, 44(6), pp. 2693–2702. Available at: https://doi.org/10.1002/2017gl072668.

BibTeX
@article{sembroni2017impact,
  title = {{Impact of the lithosphere on dynamic topography: Insights from analogue modeling}},
  author = {Sembroni, Andrea and Király, Ágnés and Faccenna, Claudio and Funiciello, Francesca and Becker, T. W. and Globig, Jan and Fernández, Manel},
  journal = {Geophysical Research Letters},
  volume = {44},
  number = {6},
  pages = {2693--2702},
  year = {2017},
  doi = {10.1002/2017gl072668}
}

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