Pre-mission InSights on the Interior of Mars - Archive ouverte HAL Access content directly
Journal Articles Space Science Reviews Year : 2019

Pre-mission InSights on the Interior of Mars

Suzanne E. Smrekar
  • Function : Author
Tilman Spohn
W. Bruce Banerdt
  • Function : Author
Doris Breuer
  • Function : Author
Ulrich Christensen
  • Function : Author
Véronique Dehant
Mélanie Drilleau
William Folkner
Nobuaki Fuji
Domenico Giardini
Matthew Golombek
Matthias Grott
Tamara Gudkova
  • Function : Author
Catherine Johnson
Amir Khan
Anna Mittelholz
Robert Myhill
  • Function : Author
Mark Panning
Clément Perrin
Tom Pike
  • Function : Author
Ana-Catalina Plesa
  • Function : Author
Attilio Rivoldini
Simon C. Stähler
  • Function : Author
Martin van Driel
  • Function : Author
Tim van Hoolst
  • Function : Author
Renee Weber
  • Function : Author
Mark Wieczorek

Abstract

Abstract The Interior exploration using Seismic Investigations, Geodesy, and Heat Trans-port (InSight) Mission will focus on Mars’ interior structure and evolution. The basic structure of crust, mantle, and core form soon after accretion. Understanding the early differentiation process on Mars and how it relates to bulk composition is key to improving our understanding of this process on rocky bodies in our solar system, as well as in other solar systems. Current knowledge of differentiation derives largely from the layers observed via seismology on the Moon. However, the Moon’s much smaller diameter make it a poor analog with respect to interior pressure and phase changes. In this paper we review the current knowledge of the thickness of the crust, the diameter and state of the core, seismic attenuation, heat flow, and interior composition. InSight will conduct the first seismic and heat flow measurements of Mars, as well as more precise geodesy. These data reduce uncertainty in crustal thickness, core size and state, heat flow, seismic activity and meteorite impact rates by a factor of 3–10× relative to previous estimates. Based on modeling of seismic wave propagation, we can further constrain interior temperature, composition, and the location of phase changes. By combining heat flow and a well constrained value of crustal thickness, we can estimate the distribution of heat producing elements between the crust and mantle. All of these quantities are key inputs to models of interior convection and thermal evolution that predict the processes that control subsurface temperature, rates of volcanism, plume distribution and stability, and convective state. Collectively these factors offer strong controls on the overall evolution of the geology and habitability of Mars.
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Dates and versions

hal-01990798 , version 1 (23-01-2019)

Identifiers

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Suzanne E. Smrekar, Philippe Lognonné, Tilman Spohn, W. Bruce Banerdt, Doris Breuer, et al.. Pre-mission InSights on the Interior of Mars. Space Science Reviews, 2019, 215 (1), pp.1-72. ⟨10.1007/s11214-018-0563-9⟩. ⟨hal-01990798⟩
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