Volume 49, Issue 15 pp. 5069-5085
RESEARCH ARTICLE

Insights into Martian bedform migration: Results from Gale, Jezero and Pasteur craters

Anurag Sahu

Anurag Sahu

Department of Earth and Atmospheric Sciences, National Institute of Technology Rourkela, Odisha, India

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Anirban Mandal

Anirban Mandal

Department of Earth and Atmospheric Sciences, National Institute of Technology Rourkela, Odisha, India

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Satyaki Banerjee

Satyaki Banerjee

Department of Earth and Atmospheric Sciences, National Institute of Technology Rourkela, Odisha, India

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Jagabandhu Panda

Corresponding Author

Jagabandhu Panda

Department of Earth and Atmospheric Sciences, National Institute of Technology Rourkela, Odisha, India

Correspondence

Jagabandhu Panda, Department of Earth and Atmospheric Sciences, National Institute of Technology Rourkela, Odisha 769008, India.

Email: [email protected]

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First published: 04 November 2024

Abstract

An attempt is made in this study to advance the understanding of the sand movement on Mars by studying the bedform migration at Gale, Jezero and Pasteur craters. The study on the grain size distribution at Gale Crater using Curiosity rover (MAHLI and APXS) observations reveals that the grains with smaller diameters (~50–150 μ) are more prone to migration and vice-versa, which gives an idea of the necessary requirements that initiate bedform migration. The chemical analysis of the surface materials at the Gale crater revealed elevated concentrations of P2O5, SO3, Cl and Zn in soil compared to sand and active transportation processes for sand but not soil. The comprehensive chemical makeup of the Martian soil (inactive bedforms) and sand (active bedforms) is characterized by its basaltic nature, with enriched volatile elements such as sulphur, chlorine and zinc, and the presence of minerals like plagioclase, pyroxene and olivine due to the cohesive nature of inactive bedforms. Physical weathering and wind flow velocity play a pivotal role in the formation of different sedimentary bodies, impacting grain size distribution and mineralogy. The effect of dust-lifting on surface features is studied by analysing Perseverance-MEDA observations at the Jezero crater to understand the short-term changes in the bedform. These events are found to involve the redistribution of only a small amount of materials and, thereby, changing surface features on Mars over a short period. To detect the bedform migration in the Pasteur crater, several HiRISE images acquired over different time intervals were used. The changes in the ripple crest (~0.29–1.18 m/Earth year) and dune slip face suggest new grain flow events. In the Pasteur crater, extensive changes in sand deposits near the dunes signify a widespread bedform migration. The stronger north-westerly and north-easterly winds dominate these changes. Thus, the bedform migration in the three tropical craters exhibits significant variability driven by localized aeolian processes. This variability is crucial for understanding Mars' geological history, current surface dynamics and eventually, helps in planning future missions.

CONFLICT OF INTEREST STATEMENT

The authors do not have any known competing interests concerning financial, non-financial or personal aspects.

DATA AVAILABILITY STATEMENT

The datasets used in the study are publicly available. The sand grain distribution data was taken from the article by Weitz et al. (2018), and the data is publicly available at https://figshare.com/articles/dataset/Grain_Sizes/16622854. The HiRISE RDRs used for this study are freely accessible at the University of Arizona website at https://www.uahirise.org/. The MEDA and APXS datasets are publicly available in the NASA PDS.

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