The early geodynamic evolution of Mars-type planets

Siqi Zhang; Craig O'Neill

doi:10.1016/j.icarus.2015.10.019

The early geodynamic evolution of Mars-type planets

Siqi Zhang^*, Craig O'Neill

^*Corresponding author for this work

ARC Centre of Excellence for Core to Crust Fluid Systems (incorporation ARC National Key Centre for Geochemical evolution and Metallogeny of Continents (GEMOC))

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

24 Downloads (Pure)

Abstract

It is not clear whether Mars once possessed active tectonics, yet the question is critical for understanding the thermal evolution of Mars, and the origin and longevity of its early dynamo. To address these issues, we have coupled mantle flow simulations, together with parameterized core evolution models, to simulate the early evolution of Mars-like planets, and constrain the influence of early mobile-lid tectonics on core evolution. We have explored a wide parameter suite, encapsulating a range of uncertainties in initial conditions, rheological parameters, and surface strength. We present successful models that experience early mobile-lid behaviour, with a later transition into a stagnant-lid mode, which reproduce core dynamo histories similar to the magnetic history of early Mars.

Original language	English
Pages (from-to)	187-208
Number of pages	22
Journal	Icarus
Volume	265
DOIs	https://doi.org/10.1016/j.icarus.2015.10.019
Publication status	Published - 1 Feb 2016

Bibliographical note

Copyright the Author(s) 2015. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

Geophysics
Mars
Planetary dynamics
Thermal histories

Access to Document

10.1016/j.icarus.2015.10.019

Publisher version (open access).pdfFinal published version, 6.77 MB

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2 Finished

Strength and resistance along oceanic megathrust faults: Implications for subduction initiation
O'Neill, C. J. & Newton, J.
1/01/11 → 31/03/17
Project: Research
The effective strength of oceanic plate bounding faults
O'Neill, C. J., Afonso, J. C. & Newton, J.
1/01/11 → 30/09/15
Project: Research

Cite this

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title = "The early geodynamic evolution of Mars-type planets",

abstract = "It is not clear whether Mars once possessed active tectonics, yet the question is critical for understanding the thermal evolution of Mars, and the origin and longevity of its early dynamo. To address these issues, we have coupled mantle flow simulations, together with parameterized core evolution models, to simulate the early evolution of Mars-like planets, and constrain the influence of early mobile-lid tectonics on core evolution. We have explored a wide parameter suite, encapsulating a range of uncertainties in initial conditions, rheological parameters, and surface strength. We present successful models that experience early mobile-lid behaviour, with a later transition into a stagnant-lid mode, which reproduce core dynamo histories similar to the magnetic history of early Mars.",

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AU - Zhang, Siqi

AU - O'Neill, Craig

N1 - Copyright the Author(s) 2015. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2016/2/1

Y1 - 2016/2/1

N2 - It is not clear whether Mars once possessed active tectonics, yet the question is critical for understanding the thermal evolution of Mars, and the origin and longevity of its early dynamo. To address these issues, we have coupled mantle flow simulations, together with parameterized core evolution models, to simulate the early evolution of Mars-like planets, and constrain the influence of early mobile-lid tectonics on core evolution. We have explored a wide parameter suite, encapsulating a range of uncertainties in initial conditions, rheological parameters, and surface strength. We present successful models that experience early mobile-lid behaviour, with a later transition into a stagnant-lid mode, which reproduce core dynamo histories similar to the magnetic history of early Mars.

AB - It is not clear whether Mars once possessed active tectonics, yet the question is critical for understanding the thermal evolution of Mars, and the origin and longevity of its early dynamo. To address these issues, we have coupled mantle flow simulations, together with parameterized core evolution models, to simulate the early evolution of Mars-like planets, and constrain the influence of early mobile-lid tectonics on core evolution. We have explored a wide parameter suite, encapsulating a range of uncertainties in initial conditions, rheological parameters, and surface strength. We present successful models that experience early mobile-lid behaviour, with a later transition into a stagnant-lid mode, which reproduce core dynamo histories similar to the magnetic history of early Mars.

KW - Geophysics

KW - Mars

KW - Planetary dynamics

KW - Thermal histories

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The early geodynamic evolution of Mars-type planets

Abstract

Bibliographical note

Keywords

Access to Document

Strength and resistance along oceanic megathrust faults: Implications for subduction initiation

The effective strength of oceanic plate bounding faults

Cite this