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Mars' core and magnetism

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  • David J. Stevenson

    (California Institute of Technology)

Abstract

The detection of strongly magnetized ancient crust on Mars is one of the most surprising outcomes of recent Mars exploration, and provides important insight about the history and nature of the martian core. The iron-rich core probably formed during the hot accretion of Mars ∼4.5 billion years ago and subsequently cooled at a rate dictated by the overlying mantle. A core dynamo operated much like Earth's current dynamo, but was probably limited in duration to several hundred million years. The early demise of the dynamo could have arisen through a change in the cooling rate of the mantle, or even a switch in convective style that led to mantle heating. Presently, Mars probably has a liquid, conductive outer core and might have a solid inner core like Earth.

Suggested Citation

  • David J. Stevenson, 2001. "Mars' core and magnetism," Nature, Nature, vol. 412(6843), pages 214-219, July.
    • Handle: RePEc:nat:nature:v:412:y:2001:i:6843:d:10.1038_35084155
    DOI: 10.1038/35084155
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    Cited by:

    1. Dariusz Knez & Mohammad Ahmad Mahmoudi Zamani, 2021. "A Review of the Geomechanics Aspects in Space Exploration," Energies, MDPI, vol. 14(22), pages 1-21, November.
    2. Weijia Sun & Hrvoje Tkalčić, 2022. "Repetitive marsquakes in Martian upper mantle," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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