The early geodynamic evolution of Mars-type planets

Siqi Zhang*, Craig O'Neill

*Corresponding author for this work

Research output: Contribution to journalArticle

14 Citations (Scopus)
17 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 languageEnglish
Pages (from-to)187-208
Number of pages22
JournalIcarus
Volume265
DOIs
Publication statusPublished - 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

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