干旱区生态环境知识资源中心(Arid): GPR and EMI Characterization of the Hyperarid Study Site of Yungay, Chile: Implications of Applying Geophysical Methods on Mars

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DOI	10.1029/2021EA001790
	GPR and EMI Characterization of the Hyperarid Study Site of Yungay, Chile: Implications of Applying Geophysical Methods on Mars
	Bo, I. Dal; Klotzsche, A.; Bol, R.; Moradi, G.; Weihermueller, L.; Vereecken, H.; van der Kruk, J.
通讯作者	Klotzsche, A (corresponding author), Forschungszentrum Julich, Inst Bio & Geosci, Agrosphere IBG 3, Wilhelm Johnen Str, Julich, Germany.
来源期刊	EARTH AND SPACE SCIENCE
EISSN	2333-5084
出版年	2021
卷号	8 期号:12
英文摘要	To unequivocally discover the actual presence of life or even of near surface liquid water on extraterrestrial planetary bodies would be a key scientific breakthrough for humankind. For this reason, studying similar environments on Earth is essential to understanding the processes shaping such extraterrestrial objects. The Yungay area in the Chilean part of the Atacama Desert is deemed to be particularly suitable as a terrestrial analog of Mars (TAM). In this study, we deployed multi-frequency ground penetrating radar (GPR) and a six-coil electromagnetic induction (EMI) system with a maximum depth of investigation of 1.8 m over an area of 0.66 hectares (110 x 60 m). By applying a LOWESS algorithm to the GPR envelope data, we aimed to extrapolate the strongest amplitudes indicating physical contrasts to 3D. The results were constrained with two existing pits 100 m apart. Whereas clay content was mostly responsible for GPR signal attenuation, changes in texture and stratigraphy were linked with strong amplitude reflections. EMI showed very low apparent electrical conductivity (ECa) values between 0 and 5 mS/m. The ECa variability could be linked to changes in clay content with depth. This agreed with the surface obtained from the LOWESS algorithm. Although soil samples are still necessary to constrain the measured signals, we showed the benefits of applying geophysics for large-scale characterization and can conclude that these two methods are suitable for such hyperarid TAM environments. A similar routine if applied on the surface of Mars could deliver promising results for similar characteristics.
英文关键词	ground penetrating radar electromagnetic induction geophysical imaging hyperarid environment Mars exploration
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000734382000020
WOS关键词	GROUND-PENETRATING RADAR ; ATACAMA DESERT ; ELECTROMAGNETIC INDUCTION ; SOIL ; SUBSURFACE ; LIFE ; MOISTURE ; ARIDITY ; MISSION ; ORIGIN
WOS类目	Astronomy & Astrophysics ; Geosciences, Multidisciplinary
WOS研究方向	Astronomy & Astrophysics ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/373951
作者单位	[Bo, I. Dal; Klotzsche, A.; Bol, R.; Moradi, G.; Weihermueller, L.; Vereecken, H.; van der Kruk, J.] Forschungszentrum Julich, Inst Bio & Geosci, Agrosphere IBG 3, Wilhelm Johnen Str, Julich, Germany
推荐引用方式 GB/T 7714	Bo, I. Dal,Klotzsche, A.,Bol, R.,et al. GPR and EMI Characterization of the Hyperarid Study Site of Yungay, Chile: Implications of Applying Geophysical Methods on Mars[J],2021,8(12).
APA	Bo, I. Dal.,Klotzsche, A..,Bol, R..,Moradi, G..,Weihermueller, L..,...&van der Kruk, J..(2021).GPR and EMI Characterization of the Hyperarid Study Site of Yungay, Chile: Implications of Applying Geophysical Methods on Mars.EARTH AND SPACE SCIENCE,8(12).
MLA	Bo, I. Dal,et al."GPR and EMI Characterization of the Hyperarid Study Site of Yungay, Chile: Implications of Applying Geophysical Methods on Mars".EARTH AND SPACE SCIENCE 8.12(2021).