Investigating grain size in the Martian mantle: Implications of basal mantle layers and viscoelastic models

IF 2.5 2区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Icarus Pub Date : 2025-04-04 DOI:10.1016/j.icarus.2025.116592

Feng Liang , Jianguo Yan , Chi Xiao , Yuji Harada , Jean-Pierre Barriot

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引用次数: 0

Abstract

This study examines the grain size in the Martian mantle using viscoelastic dissipation models and two interior structural configurations: S23M1 (without a basal mantle layer, BML) and S23M2 (with a BML). Results indicate substantial variations in grain size estimates depending on the viscoelastic model employed. For instance, Andrade(μ-β) models suggest smaller grain sizes (∼1 mm), while Burgers(background), Burgers(+peak), and Andrade(fixed β) models predict a broader range of 0.1–10 cm. Sundberg-Cooper models, by contrast, yield larger grain sizes (>0.5 cm). The inclusion of a BML generally leads to smaller grain size estimates. For instance, Sundberg-Cooper predictions decrease from ∼10 cm to ∼0.8 cm with a BML, attributed to altered average rigidity of Mars that reduces elastic response. These findings stress the importance of mantle structure in interpreting viscoelastic properties and reconciling laboratory-derived constraints with geophysical observations. Future tidal measurements are critical for refining these models further.

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来源期刊

Icarus 地学天文-天文与天体物理

CiteScore

6.30

自引率

18.80%

发文量

356

审稿时长

2-4 weeks

期刊介绍： Icarus is devoted to the publication of original contributions in the field of Solar System studies. Manuscripts reporting the results of new research - observational, experimental, or theoretical - concerning the astronomy, geology, meteorology, physics, chemistry, biology, and other scientific aspects of our Solar System or extrasolar systems are welcome. The journal generally does not publish papers devoted exclusively to the Sun, the Earth, celestial mechanics, meteoritics, or astrophysics. Icarus does not publish papers that provide "improved" versions of Bode''s law, or other numerical relations, without a sound physical basis. Icarus does not publish meeting announcements or general notices. Reviews, historical papers, and manuscripts describing spacecraft instrumentation may be considered, but only with prior approval of the editor. An entire issue of the journal is occasionally devoted to a single subject, usually arising from a conference on the same topic. The language of publication is English. American or British usage is accepted, but not a mixture of these.