干旱区生态环境知识资源中心(Arid): Candidate cave entrances in a planetary analogue evaporite karst (Cordillera de la Sal, Chile): A remote sensing approach and ground-truth reconnaissance

Arid

DOI	10.1016/j.geomorph.2021.107851
	Candidate cave entrances in a planetary analogue evaporite karst (Cordillera de la Sal, Chile): A remote sensing approach and ground-truth reconnaissance
	Pisani, Luca; De Waele, Jo
通讯作者	Pisani, L (corresponding author), Univ Bologna, Dept Biol Geol & Environm Sci, Bologna, Italy.
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2021
卷号	389
英文摘要	The Cordillera de la Sal (CDS) is a NNE-SSW elongated fold-and-thrust belt several km wide and over 100 km long located in the hyper-arid climate of the Atacama Desert. This ridge contains important Oligocene-Miocene continental sediments including thick interbedded salt rock units which form extensive outcrops. Despite the rare occurrence of rain events, these salt rock beds host well-developed and scientifically interesting underground cave systems, perfectly adapted to the contemporary drainage network. The complete lack of vegetation makes this area a perfect analogue to extraterrestrial evaporite karst areas. A remote sensing analysis of 600 km(2) of Pleiades images (acquired in 2018 by courtesy of European Space Agency) at a spatial resolution of 0.5m(panchromatic) and 2m(RGB and near-infrared bands) and DTMs extracted from stereographic couples has allowed tomap the lithological units, the drainage network, and the candidate cave entrances (CCEs) of most of the Cordillera de la Sal. The study area has been divided in eightmorpho-structural units, based on our geological and geomorphological mapping. An Analytic Hierarchy Process (AHP) was used to classify the CCE potential of these karst zones into four classes: low, medium, high, and very high potential of finding new caves. This remote-sensing derived CCEs inventory has been ground truthed with two testing datasets (101 points): i) confronting the cave register based on explorations carried out prior to this analysis, and ii) with a field-based validation in completely unexplored areas. These ground-truthing methods support the quality and reliability of our remote sensing-derived CCEs, with accuracies of 71% and 83%, respectively. With this integrated remote-sensing and ground-truthing approach, we highlight that CCEs identification by image analysis and GIS processing appears reliable for speleological explorations in the CDS and might be a valuable tool also for objective decision-making in the search of caves and potential areas susceptible to karst formation on other planetary bodies. (C) 2021 Elsevier B.V. All rights reserved.
英文关键词	Halite caves Karst geomorphology Speleology Pleiades satellite images GIS
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000685509200004
WOS关键词	INTERIOR LAYERED DEPOSIT ; ATACAMA DESERT ; HONEYCOMB TERRAIN ; HELLAS BASIN ; LANDFORMS ; SINKHOLES ; CRATER ; EARTH ; MARS ; LANDSCAPE
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363426
作者单位	[Pisani, Luca; De Waele, Jo] Univ Bologna, Dept Biol Geol & Environm Sci, Bologna, Italy; [De Waele, Jo] La Venta Esploraz Geog, Treviso, Italy
推荐引用方式 GB/T 7714	Pisani, Luca,De Waele, Jo. Candidate cave entrances in a planetary analogue evaporite karst (Cordillera de la Sal, Chile): A remote sensing approach and ground-truth reconnaissance[J],2021,389.
APA	Pisani, Luca,&De Waele, Jo.(2021).Candidate cave entrances in a planetary analogue evaporite karst (Cordillera de la Sal, Chile): A remote sensing approach and ground-truth reconnaissance.GEOMORPHOLOGY,389.
MLA	Pisani, Luca,et al."Candidate cave entrances in a planetary analogue evaporite karst (Cordillera de la Sal, Chile): A remote sensing approach and ground-truth reconnaissance".GEOMORPHOLOGY 389(2021).