干旱区生态环境知识资源中心(Arid): Analysis of Rock Varnish from the Mojave Desert by Handheld Laser-Induced Breakdown Spectroscopy

Arid

DOI	10.3390/molecules26175200
	Analysis of Rock Varnish from the Mojave Desert by Handheld Laser-Induced Breakdown Spectroscopy
	Harmon, Russell S.; Khashchevskaya, Daria; Morency, Michelle; Owen, Lewis A.; Jennings, Morgan; Knott, Jeffrey R.; Dortch, Jason M.
通讯作者	Harmon, RS (corresponding author), North Carolina State Univ, Dept Marine Earth & Atmospher Sci, Raleigh, NC 27695 USA.
来源期刊	MOLECULES
EISSN	1420-3049
出版年	2021
卷号	26 期号:17
英文摘要	Laser-induced breakdown spectroscopy (LIBS) is a form of optical emission spectroscopy that can be used for the rapid analysis of geological materials in the field under ambient environmental conditions. We describe here the innovative use of handheld LIBS for the in situ analysis of rock varnish. This thinly laminated and compositionally complex veneer forms slowly over time on rock surfaces in dryland regions and is particularly abundant across the Mojave Desert climatic region of east-central California (USA). Following the depth profiling examination of a varnished clast from colluvial gravel in Death Valley in the laboratory, our in situ analysis of rock varnish and visually similar coatings on rock surfaces was undertaken in the Owens and Deep Spring valleys in two contexts, element detection/identification and microchemical mapping. Emission peaks were recognized in the LIBS spectra for the nine elements most abundant in rock varnish-Mn, Fe, Si, Al, Na, Mg, K, Ca and Ba, as well as for H, Li, C, O, Ti, V, Sr and Rb. Focused follow-up laboratory and field studies will help understand rock varnish formation and its utility for weathering and chronological studies.
英文关键词	laser-induced breakdown spectroscopy (LIBS) rock varnish geochemical fingerprinting microchemical mapping desert pavement
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000694352400001
WOS关键词	OXIDE MINERALOGY ; MANGANESE-OXIDE ; SONORAN DESERT ; SIERRA-NEVADA ; NEGEV DESERT ; ORIGIN ; NANOMETER ; COATINGS ; SURFACE ; VALLEY
WOS类目	Biochemistry & Molecular Biology ; Chemistry, Multidisciplinary
WOS研究方向	Biochemistry & Molecular Biology ; Chemistry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364193
作者单位	[Harmon, Russell S.; Khashchevskaya, Daria; Morency, Michelle; Owen, Lewis A.] North Carolina State Univ, Dept Marine Earth & Atmospher Sci, Raleigh, NC 27695 USA; [Jennings, Morgan] SciAps Inc, 7 Constitut Way, Woburn, MA 01801 USA; [Knott, Jeffrey R.] Calif State Univ Fullerton, Dept Geol Sci, Fullerton, CA 92831 USA; [Dortch, Jason M.] Univ Kentucky, Kentucky Geol Survey, Lexington, KY 40508 USA
推荐引用方式 GB/T 7714	Harmon, Russell S.,Khashchevskaya, Daria,Morency, Michelle,et al. Analysis of Rock Varnish from the Mojave Desert by Handheld Laser-Induced Breakdown Spectroscopy[J],2021,26(17).
APA	Harmon, Russell S..,Khashchevskaya, Daria.,Morency, Michelle.,Owen, Lewis A..,Jennings, Morgan.,...&Dortch, Jason M..(2021).Analysis of Rock Varnish from the Mojave Desert by Handheld Laser-Induced Breakdown Spectroscopy.MOLECULES,26(17).
MLA	Harmon, Russell S.,et al."Analysis of Rock Varnish from the Mojave Desert by Handheld Laser-Induced Breakdown Spectroscopy".MOLECULES 26.17(2021).