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Journal Article

The Mars 2020 Candidate Landing Sites: A Magnetic Field Perspective

Authors
/persons/resource/anna

Mittelholz,  Anna
0 Pre-GFZ, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/mors

Morschhauser,  Achim
2.3 Earth's Magnetic Field, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Johnson,  C. L.
External Organizations;

Langlais,  B.
External Organizations;

Lillis,  R. J.
External Organizations;

/persons/resource/foteini

Vervelidou,  Foteini
2.3 Earth's Magnetic Field, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Weiss,  B. P.
External Organizations;

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Fulltext (public)

3497889.pdf
(Publisher version), 4MB

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Citation

Mittelholz, A., Morschhauser, A., Johnson, C. L., Langlais, B., Lillis, R. J., Vervelidou, F., Weiss, B. P. (2018): The Mars 2020 Candidate Landing Sites: A Magnetic Field Perspective. - Earth and Space Science, 5, 9, 410-424.
https://doi.org/10.1029/2018EA000420


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_3497889
Abstract
We present an analysis of the remaining three candidate landing sites for Mars 2020, Columbia Hills (CH), Northeast Syrtis (NES) and Jezero (JE) from the perspective of understanding Mars' crustal magnetic field. We identify how the different sites can address each of six community‐defined paleomagnetic science objectives for Mars return samples. These objectives include understanding the early dynamo field and its variability, identification of magnetic minerals that carry magnetization in the samples, and characterization of any thermal and chemical alteration of samples. Satellite data have provided global and regional constraints on crustal magnetization, indicating strong magnetizations at CH, and weak to no magnetization at JE and NES. However, the primary paleomagnetic interest – understanding the early dynamo – requires ground truth from a landing site at which pre‐Noachian and early Noachian deposits are accessible. This requirement is most likely met by the site NES which contains meggabreccia deposits, and it is therefore the highest priority landing site for magnetic field investigations. Importantly, a sample return mission has never been done and so any of the three landing sites will provide critical, new data that will contribute to understanding the history of Mars' magnetic field and crustal mineralogy and, in turn, their constraints on the planet's evolution.