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Geophysical evidence for an enriched molten silicate layer above Mars's core

Space Sciences

Geophysical evidence for an enriched molten silicate layer above Mars's core

H. Samuel, M. Drilleau, et al.

Unlock the mysteries of Mars's core with groundbreaking research from Henri Samuel and colleagues. This paper challenges previous seismic assumptions, proposing a new heterogeneous mantle model that could explain the planet's magnetic history and seismic behaviors. Join us in exploring this exciting advancement in Mars studies!

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Playback language: English
Abstract
Previous seismic estimations of Mars's core size (1,830 ± 40 km) assumed a homogeneous mantle, conflicting with observed anomalously slow P waves. This paper proposes a heterogeneous mantle structure with an enriched molten silicate layer above the core. This model, with a core size of 1,650 ± 20 km and density of 6.5 g cm⁻³, is consistent with seismic data, shear attenuation, and tidal dissipation. The layered structure necessitates external sources for Mars's past magnetic field.
Publisher
Nature
Published On
Oct 25, 2023
Authors
Henri Samuel, Mélanie Drilleau, Attilio Rivoldini, Zongbo Xu, Quancheng Huang, Raphaël F. Garcia, Vedran Lekić, Jessica C. E. Irving, James Badro, Philippe H. Lognonné, James A. D. Connolly, Taichi Kawamura, Tamara Gudkova, William B. Banerdt
Tags
Mars
core size
heterogeneous mantle
seismic data
magnetic field

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