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Observations and interpretations of geomorphologic features in the Tianwen-1 landing area on Mars by using orbital imagery data

查看全文 作　　者：Hai [1,2]Huang;Xing [1,2]Wang;Yuan [1,2]Chen;Qing [1,2]Zhang;FeiYue [1,2]Zhao;Xin [1]Ren;XingGuo [1]Zeng;Wei [1]Yan;WangLi [1]Chen;Bin [1]Liu;DaWei [1]Liu;LianBo [1,2]Fu;JianJun [1,2]Liu 高影响力作者 机构地区：[1]Key Laboratory of Lunar and Deep Space Exploration,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;[2]School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China高影响力机构 出　　处：《Earth and Planetary Physics》索引2023年第7卷第3期,共16页高影响力期刊 基　　金：supported by the Key Research Program of the Chinese Academy of Sciences(Grant No.ZDBS-SSW-TLC001);the National Natural Science Foundation(Grant No.11803056). 摘　　要：China’s first Mars exploration mission,Tianwen-1,successfully landed in southern Utopia Planitia on Mars on May 15,2021.This work presents a detailed investigation of the geologic context of the landing area surface for this mission based on orbital remotesensing data.We constructed a geomorphologic map for the Tianwen-1 landing area.Results of our detailed geomorphologic map show several major landforms within the landing area,including rampart craters,mesas,troughs,cones,and ridges.Analysis of materials on the landing area surface indicates that most of the landing area is covered by Martian dust.Transverse aeolian ridges are widely distributed within the landing area,indicating the surface contexts were(and still are)modified by regional winds.In addition,a crater counting analysis indicates the landing area has an absolute model age of~3.3 Ga and that a later resurfacing event occurred at~1.6 Ga.Finally,we outline four formational scenarios to test the formation mechanisms for the geomorphologic features on the landing area surface.The most likely interpretation to explain the existence of the observed surface features can be summarized as follows:A thermal influence may have played an important role in the formation of the surface geomorphologic features;thus,igneous-related processes may have occurred in the landing area.Water ice may also have been involved in the construction of the primordial surface configuration.Subsequent resurfacing events and aeolian processes buried and modified the primordial surface. 关 键 词：MARS Utopia Planitia Tianwen-1 geomorphologic features water ice heat source
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