GSTDTAP  > 气候变化
DOI10.1126/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. 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
2021-07-23
发表期刊Science
出版年2021
英文摘要Because of the lack of direct seismic observations, the interior structure of Mars has been a mystery. Khan et al. , Knapmeyer-Endrun et al. , and Stähler et al. used recently detected marsquakes from the seismometer deployed during the InSight mission to map the interior of Mars (see the Perspective by Cottaar and Koelemeijer). Mars likely has a 24- to 72-kilometer-thick crust with a very deep lithosphere close to 500 kilometers. Similar to the Earth, a low-velocity layer probably exists beneath the lithosphere. The crust of Mars is likely highly enriched in radioactive elements that help to heat this layer at the expense of the interior. The core of Mars is liquid and large, ∼1830 kilometers, which means that the mantle has only one rocky layer rather than two like the Earth has. These results provide a preliminary structure of Mars that helps to constrain the different theories explaining the chemistry and internal dynamics of the planet. Science , abf2966, abf8966, abi7730, this issue p. [434][1], p. [438][2], p. [443][3] see also abj8914, p. [388][4] 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. [1]: /lookup/doi/10.1126/science.abf2966 [2]: /lookup/doi/10.1126/science.abf8966 [3]: /lookup/doi/10.1126/science.abi7730 [4]: /lookup/doi/10.1126/science.abj8914
领域气候变化 ; 资源环境
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/334490
专题气候变化
资源环境科学
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Amir Khan,Savas Ceylan,Martin van Driel,et al. Upper mantle structure of Mars from InSight seismic data[J]. Science,2021.
APA Amir Khan.,Savas Ceylan.,Martin van Driel.,Domenico Giardini.,Philippe Lognonné.,...&William B. Banerdt.(2021).Upper mantle structure of Mars from InSight seismic data.Science.
MLA Amir Khan,et al."Upper mantle structure of Mars from InSight seismic data".Science (2021).
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