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Tectonic plates in 3D mantle convection model with stress- history-dependent rheology
Masanori Kameyama
IPU Kantaiheiyo Daigaku Tanki Daigakubu
Corresponding Author
ORCiD: https://orcid.org/0000-0003-1739-2242
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This work is licensed under a CC BY 4.0 License. Read Full License
View the published version at Earth, Planets and Space.
Plate tectonics is a key feature of the dynamics of the Earth’s mantle. By taking into account the stress-history-dependent rheology of mantle materials, we succeeded in realistically producing tectonic plates in our numerical model of mantle convection in a three-dimensional rectangular box. The calculated lithosphere is separated into several pieces (tectonic plates) that rigidly move. Deformation of the lithosphere caused by the relative motion of adjacent plates is concentrated in narrow bands (plate margins) where the viscosity is substantially reduced. The plate margins develop when the stress exceeds a threshold and the lithosphere is ruptured. Once formed, the plate margins persist, even after the stress is reduced below the threshold, allowing the plates to stably move over geologic time. The vertical component of vorticity takes a large value in the narrow plate margins. Secondary convection occurs beneath old tectonic plates as two-dimensional rolls with their axes aligned to the direction of plate motion. The surface heat flow decreases with increasing distance from divergent plate margins (ridges) in their vicinity in the way the cooling half-space model predicts, but it tends towards a constant value away from ridges as observed for the Earth because of the heat transport by the secondary convection.
Keywords
Mantle convection, 3D numerical model, Plate Tectonics, Stress-history-dependent rheology
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CURRENT STATUS: Published
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Posted 15 May, 2020
Published
On 24 May, 2020
No community comments so far
Editorial decision: Accept
On 08 May, 2020
Editor assigned
On 02 May, 2020
Submission checks complete
On 01 May, 2020
Editor invited
On 01 May, 2020
No comments provided
Editorial decision: Minor Revision
On 19 Apr, 2020
Review #2 received
Received 18 Apr, 2020
Review #1 received
Received 16 Apr, 2020
Reviewer #2 agreed
On 03 Apr, 2020
Editor assigned
On 01 Apr, 2020
Reviewers invited
Invitations sent on 01 Apr, 2020
Reviewer #1 agreed
On 01 Apr, 2020
Editor invited
On 31 Mar, 2020
First submitted
On 23 Mar, 2020
Submission checks complete
On 23 Mar, 2020
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This preprint is under consideration at Earth, Planets and Space. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Express Letter
Tectonic plates in 3D mantle convection model with stress- history-dependent rheology
Masanori Kameyama
IPU Kantaiheiyo Daigaku Tanki Daigakubu
Corresponding Author
ORCiD: https://orcid.org/0000-0003-1739-2242
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
Version 2
Posted 15 May, 2020
Published
On 24 May, 2020
No community comments so far
Editorial decision: Accept
On 08 May, 2020
Editor assigned
On 02 May, 2020
Submission checks complete
On 01 May, 2020
Editor invited
On 01 May, 2020
No comments provided
Editorial decision: Minor Revision
On 19 Apr, 2020
Review #2 received
Received 18 Apr, 2020
Review #1 received
Received 16 Apr, 2020
Reviewer #2 agreed
On 03 Apr, 2020
Editor assigned
On 01 Apr, 2020
Reviewers invited
Invitations sent on 01 Apr, 2020
Reviewer #1 agreed
On 01 Apr, 2020
Editor invited
On 31 Mar, 2020
First submitted
On 23 Mar, 2020
Submission checks complete
On 23 Mar, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Astronomy
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published version at Earth, Planets and Space.
Plate tectonics is a key feature of the dynamics of the Earth’s mantle. By taking into account the stress-history-dependent rheology of mantle materials, we succeeded in realistically producing tectonic plates in our numerical model of mantle convection in a three-dimensional rectangular box. The calculated lithosphere is separated into several pieces (tectonic plates) that rigidly move. Deformation of the lithosphere caused by the relative motion of adjacent plates is concentrated in narrow bands (plate margins) where the viscosity is substantially reduced. The plate margins develop when the stress exceeds a threshold and the lithosphere is ruptured. Once formed, the plate margins persist, even after the stress is reduced below the threshold, allowing the plates to stably move over geologic time. The vertical component of vorticity takes a large value in the narrow plate margins. Secondary convection occurs beneath old tectonic plates as two-dimensional rolls with their axes aligned to the direction of plate motion. The surface heat flow decreases with increasing distance from divergent plate margins (ridges) in their vicinity in the way the cooling half-space model predicts, but it tends towards a constant value away from ridges as observed for the Earth because of the heat transport by the secondary convection.
Figure 1
Figure 2
Figure 3
Due to technical limitations, full-text HTML conversion of this manuscript could not be completed. However, the manuscript can be downloaded and accessed as a PDF.