Upper mantle structure of Mars from InSight seismic data

Amir Khan; Savas Ceylan; Martin van Driel; Domenico Giardini; Philippe Lognonné; Henri Samuel; Nicholas C. Schmerr; Simon C. Stähler; Andrea C. Duran; Quancheng Huang; Doyeon Kim; Adrien Broquet; Constantinos Charalambous; John F. Clinton; Paul M. Davis; Mélanie Drilleau; Foivos Karakostas; Vedran Lekic; Scott M. McLennan; Ross R. Maguire; Chloé Michaut; Mark P. Panning; William T. Pike; Baptiste Pinot; Matthieu Plasman; John Robert Scholz; Rudolf Widmer-Schnidrig; Tilman Spohn; Suzanne E. Smrekar; William B. Banerdt

doi:10.1126/science.abf2966

Upper mantle structure of Mars from InSight seismic data

Amir Khan, Savas Ceylan, Martin van Driel, Domenico Giardini, Philippe Lognonné, Henri Samuel, Nicholas C. Schmerr, Simon C. Stähler, Andrea C. Duran, Quancheng Huang, Doyeon Kim, Adrien Broquet, Constantinos Charalambous, John F. Clinton, Paul M. Davis, Mélanie Drilleau, Foivos Karakostas, Vedran Lekic, Scott M. McLennan, Ross R. MaguireChloé Michaut, Mark P. Panning, William T. Pike, Baptiste Pinot, Matthieu Plasman, John Robert Scholz, Rudolf Widmer-Schnidrig, Tilman Spohn, Suzanne E. Smrekar, William B. Banerdt

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

Abstract

For 2 years, the InSight lander has been recording seismic data on Mars that are vital to constrain the structure and thermochemical state of the planet. We used observations of direct (P and S) and surface-reflected (PP, PPP, SS, and SSS) body-wave phases from eight low-frequency marsquakes to constrain the interior structure to a depth of 800 kilometers. We found a structure compatible with a low-velocity zone associated with a thermal lithosphere much thicker than on Earth that is possibly related to a weak S-wave shadow zone at teleseismic distances. By combining the seismic constraints with geodynamic models, we predict that, relative to the primitive mantle, the crust is more enriched in heat-producing elements by a factor of 13 to 20. This enrichment is greater than suggested by gamma-ray surface mapping and has a moderate-to-elevated surface heat flow.

Original language	English (US)
Pages (from-to)	434-438
Number of pages	5
Journal	Science
Volume	373
Issue number	6553
DOIs	https://doi.org/10.1126/science.abf2966
State	Published - Jul 23 2021
Externally published	Yes

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Khan, A., Ceylan, S., van Driel, M., Giardini, D., Lognonné, P., Samuel, H., Schmerr, N. C., Stähler, S. C., Duran, A. C., Huang, Q., Kim, D., Broquet, A., Charalambous, C., Clinton, J. F., Davis, P. M., Drilleau, M., Karakostas, F., Lekic, V., McLennan, S. M., ... Banerdt, W. B. (2021). Upper mantle structure of Mars from InSight seismic data. Science, 373(6553), 434-438. https://doi.org/10.1126/science.abf2966

Khan, A, Ceylan, S, van Driel, M, Giardini, D, Lognonné, P, Samuel, H, Schmerr, NC, Stähler, SC, Duran, AC, Huang, Q, Kim, D, Broquet, A, Charalambous, C, Clinton, JF, Davis, PM, Drilleau, M, Karakostas, F, Lekic, V, McLennan, SM, Maguire, RR, Michaut, C, Panning, MP, Pike, WT, Pinot, B, Plasman, M, Scholz, JR, Widmer-Schnidrig, R, Spohn, T, Smrekar, SE & Banerdt, WB 2021, 'Upper mantle structure of Mars from InSight seismic data', Science, vol. 373, no. 6553, pp. 434-438. https://doi.org/10.1126/science.abf2966

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title = "Upper mantle structure of Mars from InSight seismic data",

abstract = "For 2 years, the InSight lander has been recording seismic data on Mars that are vital to constrain the structure and thermochemical state of the planet. We used observations of direct (P and S) and surface-reflected (PP, PPP, SS, and SSS) body-wave phases from eight low-frequency marsquakes to constrain the interior structure to a depth of 800 kilometers. We found a structure compatible with a low-velocity zone associated with a thermal lithosphere much thicker than on Earth that is possibly related to a weak S-wave shadow zone at teleseismic distances. By combining the seismic constraints with geodynamic models, we predict that, relative to the primitive mantle, the crust is more enriched in heat-producing elements by a factor of 13 to 20. This enrichment is greater than suggested by gamma-ray surface mapping and has a moderate-to-elevated surface heat flow.",

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AU - Khan, Amir

AU - Ceylan, Savas

AU - van Driel, Martin

AU - Giardini, Domenico

AU - Lognonné, Philippe

AU - Samuel, Henri

AU - Schmerr, Nicholas C.

AU - Stähler, Simon C.

AU - Duran, Andrea C.

AU - Huang, Quancheng

AU - Kim, Doyeon

AU - Broquet, Adrien

AU - Charalambous, Constantinos

AU - Clinton, John F.

AU - Davis, Paul M.

AU - Drilleau, Mélanie

AU - Karakostas, Foivos

AU - Lekic, Vedran

AU - McLennan, Scott M.

AU - Maguire, Ross R.

AU - Michaut, Chloé

AU - Panning, Mark P.

AU - Pike, William T.

AU - Pinot, Baptiste

AU - Plasman, Matthieu

AU - Scholz, John Robert

AU - Widmer-Schnidrig, Rudolf

AU - Spohn, Tilman

AU - Smrekar, Suzanne E.

AU - Banerdt, William B.

PY - 2021/7/23

Y1 - 2021/7/23

N2 - For 2 years, the InSight lander has been recording seismic data on Mars that are vital to constrain the structure and thermochemical state of the planet. We used observations of direct (P and S) and surface-reflected (PP, PPP, SS, and SSS) body-wave phases from eight low-frequency marsquakes to constrain the interior structure to a depth of 800 kilometers. We found a structure compatible with a low-velocity zone associated with a thermal lithosphere much thicker than on Earth that is possibly related to a weak S-wave shadow zone at teleseismic distances. By combining the seismic constraints with geodynamic models, we predict that, relative to the primitive mantle, the crust is more enriched in heat-producing elements by a factor of 13 to 20. This enrichment is greater than suggested by gamma-ray surface mapping and has a moderate-to-elevated surface heat flow.

AB - For 2 years, the InSight lander has been recording seismic data on Mars that are vital to constrain the structure and thermochemical state of the planet. We used observations of direct (P and S) and surface-reflected (PP, PPP, SS, and SSS) body-wave phases from eight low-frequency marsquakes to constrain the interior structure to a depth of 800 kilometers. We found a structure compatible with a low-velocity zone associated with a thermal lithosphere much thicker than on Earth that is possibly related to a weak S-wave shadow zone at teleseismic distances. By combining the seismic constraints with geodynamic models, we predict that, relative to the primitive mantle, the crust is more enriched in heat-producing elements by a factor of 13 to 20. This enrichment is greater than suggested by gamma-ray surface mapping and has a moderate-to-elevated surface heat flow.

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Upper mantle structure of Mars from InSight seismic data

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