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Evolution History of Mesas in the Southern Utopia Planitia and Implications for the Ancient Oceans on Mars

  • Planet and Space
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Abstract

As one of the prominent landforms in the Zhurong landing region, mesas are geological features with flat tops and steep marginal cliffs. The mesas are widely distributed along the dichotomy boundary. There are various interpreted origins proposed for the mesas, such as the erosion of sedimentary layers, tuyas eruptions, or surface collapse due to the catastrophic release of groundwater. We investigate the detailed morphological characteristics of the mesas on the Late Hesperian Lowland unit within the Utopia Planitia. We observe morphological evidence for both the ice-bearing interior mesas and the sedimentary origin, including (1) small pits on the crater wall and mesa cliff formed by the release of volatiles like ice; (2) lobate flows at the base of mesas formed by the melting of subsurface ice; (3) layered mesas indicating sedimentary origin; (4) grooves on the top surface of mesas formed by the volumetric compaction of sedimentary deposits. The results indicate that the mesas in the study area are formed by the erosion of sedimentary layers and representative of the Noachian oceanic sediments. We propose an evolutionary model for the mesas. This study will provide some insights into future research of ancient ocean hypothesis of Mars and interesting targets for the exploration of the Zhurong rover.

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Acknowledgments

The Tianwen-1 datasets used in the study are processed and produced by “Ground Research and Application System (GRAS) of China’s Lunar and Planetary Exploration Program, provided by China National Space Administration (http://moon.bao.ac.cn). The CTX global mosaic is accessible at http://murray-lab.caltech.edu/CTX. This study was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDB 41000000), the National Natural Science Foundation of China (Nos. 42273041, 41830214), and the Preresearch Project on Civil Aerospace Technologies of CNSA (No. D020101). We appreciate Prof. Zhiyong Xiao and an anonymous reviewer and the editors for the suggestions which greatly improved the manuscript. The final publication is available at Springer via https://doi.org/10.1007/s12583-022-1776-0.

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Correspondence to Jun Huang.

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Zhang, T., Wang, L., Saidamat, A. et al. Evolution History of Mesas in the Southern Utopia Planitia and Implications for the Ancient Oceans on Mars. J. Earth Sci. 34, 940–950 (2023). https://doi.org/10.1007/s12583-022-1776-0

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  • DOI: https://doi.org/10.1007/s12583-022-1776-0

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