Arid
DOI10.2138/am-2018-6141
Laboratory and field characterization of visible to near-infrared spectral reflectance of nitrate minerals from the Atacama Desert, Chile, and implications for Mars
Wang, Fan1,2; Bowen, Brenda B.3; Seo, Ji-Hye4; Michalski, Greg2,4
通讯作者Bowen, Brenda B.
来源期刊AMERICAN MINERALOGIST
ISSN0003-004X
EISSN1945-3027
出版年2018
卷号103期号:2页码:197-206
英文摘要

Large amounts of nitrate salts occur in very specific environments and somewhat rare hyper-arid conditions, which may provide clues to fundamentally different nitrogen cycling and life survival mechanisms. Remote detection of ancient and modern nitrates on Earth and on other planetary bodies where they may occur requires a detailed understanding of their visible to near infrared (VNIR) spectral signatures. This study explores the VNIR spectral characteristics of several synthetic nitrate salts, sulfate minerals, and nitrate-bearing field samples from the Atacama Desert, Chile, to identify diagnostic spectral features of nitrate and possible interferences from other coexisting minerals. Results indicated that most of the nitrate salts have characteristic absorptions around 1.81, 1.94, 2.06, 2.21, and 2.42 mu m. A significant positive correlation exists between the continuum-removed band depths of the 2.42 mu m absorption and nitrate contents for the Atacama regolith samples, especially for samples with > 10 wt% nitrate. The five absorption features of nitrate in the field spectra collected from multiple nitrate-rich regions in the Atacama Desert were then evaluated to determine the variabilities in these features in natural settings, while the band depths of 2.42 mu m absorption were further calculated on the continuum-removed field spectra to estimate the nitrate abundances at the study sites. This work will supplement spectral libraries where nitrate spectra are lacking and have implications for future comparisons to planetary spectra to search for potentially life-related nitrate on Mars.


英文关键词Nitrate Atacama Desert Mars visible to near infrared reflectance Earth Analogs for Martian Geological Materials and Processes
类型Article
语种英语
国家Peoples R China ; USA
收录类别SCI-E
WOS记录号WOS:000428781300002
WOS关键词SOIL NITRATE ; SPECTROSCOPIC DETERMINATION ; MARTIAN ATMOSPHERE ; METAL-NITRATE ; GALE CRATER ; PRECIPITATION ; PERCHLORATE ; TRANSITION ; DEPOSITS ; NITROGEN
WOS类目Geochemistry & Geophysics ; Mineralogy
WOS研究方向Geochemistry & Geophysics ; Mineralogy
来源机构北京大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/207509
作者单位1.Peking Univ, Sch Environm & Energy, Shenzhen Grad Sch, Shenzhen 518055, Guangdong, Peoples R China;
2.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA;
3.Univ Utah, Dept Geol & Geophys, Salt Lake City, UT 84112 USA;
4.Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA
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GB/T 7714
Wang, Fan,Bowen, Brenda B.,Seo, Ji-Hye,et al. Laboratory and field characterization of visible to near-infrared spectral reflectance of nitrate minerals from the Atacama Desert, Chile, and implications for Mars[J]. 北京大学,2018,103(2):197-206.
APA Wang, Fan,Bowen, Brenda B.,Seo, Ji-Hye,&Michalski, Greg.(2018).Laboratory and field characterization of visible to near-infrared spectral reflectance of nitrate minerals from the Atacama Desert, Chile, and implications for Mars.AMERICAN MINERALOGIST,103(2),197-206.
MLA Wang, Fan,et al."Laboratory and field characterization of visible to near-infrared spectral reflectance of nitrate minerals from the Atacama Desert, Chile, and implications for Mars".AMERICAN MINERALOGIST 103.2(2018):197-206.
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