{"title":"祝融号探测器探测到的异芬烷表明火星乌托邦平原的水蚀作用有限","authors":"Enming Ju, Changqing Liu, Jian Chen, Xiaojia Zeng, Yanqing Xin, Ping Liu, Xiaohui Fu, Zongcheng Ling","doi":"10.1016/j.epsl.2024.118769","DOIUrl":null,"url":null,"abstract":"<div><p>The Short-Wave Infrared Spectrometer (SWIR) in the Mars Surface Composition Detector (MarSCoDe) package onboard the Zhurong rover revealed the presence of hydrated phases. However, the exact types of phases are ambiguous and should be further constrained using laboratory spectroscopic studies. Therefore, we build a spectral dataset of binary mixtures by mixing pyroxene and potential hydrated phases (allophane and gypsum) in the laboratory to match the SWIR spectra and calculate the hydrated phase content. We find that the primary hydrated phase may be allophane according to the spectral similarity between the laboratory dataset and SWIR spectra. The relative abundance of pyroxene (∼82 wt%) and allophane (∼18 wt%) is determined using the models built by the integrated band depth (IBD) of binary mixture spectra. When the content of pyroxene is normalized to its content in Martian soil (∼30 wt%), the content of allophane is ∼7 wt%. The allophane may come from short-term fluid-rock interactions under cold climate involving ice and snow melt, and the content of allophane (∼7 wt%) represents a low-moderate degree of weathering at the Tianwen-1 landing site. We propose possible geological evolution scenarios of the Tianwen-1 landing site, i.e., the process of rapid aqueous alteration of volcanic materials under low-temperature conditions due to environmental changes, to explain the geomorphic features and widespread allophane observed by the Zhurong rover.</p></div>","PeriodicalId":11481,"journal":{"name":"Earth and Planetary Science Letters","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Detection of allophane by the Zhurong rover indicates water-limited alteration at Utopia Planitia, Mars\",\"authors\":\"Enming Ju, Changqing Liu, Jian Chen, Xiaojia Zeng, Yanqing Xin, Ping Liu, Xiaohui Fu, Zongcheng Ling\",\"doi\":\"10.1016/j.epsl.2024.118769\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The Short-Wave Infrared Spectrometer (SWIR) in the Mars Surface Composition Detector (MarSCoDe) package onboard the Zhurong rover revealed the presence of hydrated phases. However, the exact types of phases are ambiguous and should be further constrained using laboratory spectroscopic studies. Therefore, we build a spectral dataset of binary mixtures by mixing pyroxene and potential hydrated phases (allophane and gypsum) in the laboratory to match the SWIR spectra and calculate the hydrated phase content. We find that the primary hydrated phase may be allophane according to the spectral similarity between the laboratory dataset and SWIR spectra. The relative abundance of pyroxene (∼82 wt%) and allophane (∼18 wt%) is determined using the models built by the integrated band depth (IBD) of binary mixture spectra. When the content of pyroxene is normalized to its content in Martian soil (∼30 wt%), the content of allophane is ∼7 wt%. The allophane may come from short-term fluid-rock interactions under cold climate involving ice and snow melt, and the content of allophane (∼7 wt%) represents a low-moderate degree of weathering at the Tianwen-1 landing site. We propose possible geological evolution scenarios of the Tianwen-1 landing site, i.e., the process of rapid aqueous alteration of volcanic materials under low-temperature conditions due to environmental changes, to explain the geomorphic features and widespread allophane observed by the Zhurong rover.</p></div>\",\"PeriodicalId\":11481,\"journal\":{\"name\":\"Earth and Planetary Science Letters\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.8000,\"publicationDate\":\"2024-05-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Earth and Planetary Science Letters\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0012821X24002024\",\"RegionNum\":1,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Earth and Planetary Science Letters","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0012821X24002024","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
Detection of allophane by the Zhurong rover indicates water-limited alteration at Utopia Planitia, Mars
The Short-Wave Infrared Spectrometer (SWIR) in the Mars Surface Composition Detector (MarSCoDe) package onboard the Zhurong rover revealed the presence of hydrated phases. However, the exact types of phases are ambiguous and should be further constrained using laboratory spectroscopic studies. Therefore, we build a spectral dataset of binary mixtures by mixing pyroxene and potential hydrated phases (allophane and gypsum) in the laboratory to match the SWIR spectra and calculate the hydrated phase content. We find that the primary hydrated phase may be allophane according to the spectral similarity between the laboratory dataset and SWIR spectra. The relative abundance of pyroxene (∼82 wt%) and allophane (∼18 wt%) is determined using the models built by the integrated band depth (IBD) of binary mixture spectra. When the content of pyroxene is normalized to its content in Martian soil (∼30 wt%), the content of allophane is ∼7 wt%. The allophane may come from short-term fluid-rock interactions under cold climate involving ice and snow melt, and the content of allophane (∼7 wt%) represents a low-moderate degree of weathering at the Tianwen-1 landing site. We propose possible geological evolution scenarios of the Tianwen-1 landing site, i.e., the process of rapid aqueous alteration of volcanic materials under low-temperature conditions due to environmental changes, to explain the geomorphic features and widespread allophane observed by the Zhurong rover.
期刊介绍:
Earth and Planetary Science Letters (EPSL) is a leading journal for researchers across the entire Earth and planetary sciences community. It publishes concise, exciting, high-impact articles ("Letters") of broad interest. Its focus is on physical and chemical processes, the evolution and general properties of the Earth and planets - from their deep interiors to their atmospheres. EPSL also includes a Frontiers section, featuring invited high-profile synthesis articles by leading experts on timely topics to bring cutting-edge research to the wider community.