干旱区生态环境知识资源中心(Arid): Holocene evolution of halite caves in the Cordillera de la Sal (Central Atacama, Chile) in different climate conditions

Arid

DOI	10.1016/j.geomorph.2020.107398
	Holocene evolution of halite caves in the Cordillera de la Sal (Central Atacama, Chile) in different climate conditions
	De Waele, Jo; Picotti, Vincenzo; Martina, Mario L. V.; Brook, George; Yang, Linhai; Forti, Paolo
通讯作者	De Waele, J
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2020
卷号	370
英文摘要	Geomorphological studies have been carried out in rapidly evolving salt caves related to small watersheds in the San Pedro de Atacama area, Chile. Radiocarbon ages of bones and wood from cave deposits, combined with the presence of large salt caves, geomorphological and sedimentological observations, and the results of micrometer measurements outside and in some of the caves, suggest a period of speleogenesis in the Cordillera de la Sal dur-ing the onset of the Holocene, during which the large halite cave systems developed, followed by an early Holocene hyperarid period. Most smaller caves (i.e. Lechuza del Campanario) most probably formed at the start of the wetter mid-Holocene period (5-4.4 ka), when precipitation was never intense enough to entrain large amounts of sediments, but enough to trigger cave development. A diamicton in Lechuza del Campanario Cave radiocarbon dated at ca. 4.4 ka shows that at least one high intensity rainfall event occurred in this recharge basin during the mid-Holocene wet interval. A wet period with lower intensity rainfall events followed between 4.0 and 2.5 ka, causing the 4.4 kyrs old diamicton in Lechuza del Campanario Cave to be entrenched, and the alluvial fan at the downstream end of Palacio del Sal Cave to be covered with windborne sediments dated by OSL at around 3.6 ka. At ca. 2 ka there was a high-intensity rainfall event documented by the age of a twig stuck in the ceiling of the Palacio del Sal Cave, followed by a period with lower intensity rain events until ca. 1.3 ka, when another intense flood produced a mudflow that deposited a second diamicton in Lechuza del Campanario Cave. From then on clustering of radiocarbon ages for wood and bone recovered from caves indicates increased rainfall intensity in the period ca. 0.9-0.5 ka, followed by no registered events until a minor flood at ca. 0.13 ka. The four centuries long wetter time interval (0.9-0.5 ka), corresponding to the Medieval Climate Anomaly, has been an archeologically important period in the Atacama Desert (Tiwanaku culture). The observations and a detailed review of paleoclimate literature from this key area have allowed the development of a landscape evolution model related to changing climate conditions during the Late Holocene. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Geomorphology Paleoclimate Halite caves Floods OSL dating Radiocarbon dating
类型	Article
语种	英语
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000589917400006
WOS关键词	HYPERARID ATACAMA ; NORTHERN CHILE ; DE-ATACAMA ; BOLIVIAN ALTIPLANO ; CENTRAL ANDES ; DESERT ; RECORD ; SEDIMENT ; EROSION ; QUARTZ
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327536
作者单位	[De Waele, Jo; Picotti, Vincenzo; Forti, Paolo] Univ Bologna, Dipartimento Sci Biol Geol & Ambientali, Via Zamboni 67, I-40126 Bologna, Italy; [Picotti, Vincenzo] ETH, Inst Geol, Dept Earth Sci, Soneggstr 5, CH-8092 Zurich, Switzerland; [Martina, Mario L. V.] Scuola Univ Super IUSS Pavia, Piazza Vittoria 15, I-27100 Pavia, Italy; [Brook, George; Yang, Linhai] Univ Georgia, Dept Geog, Athens, GA 30602 USA; [Yang, Linhai] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Desert & Desertificat, 320 West Donggang Rd, Lanzhou 730000, Gansu, Peoples R China; [De Waele, Jo; Forti, Paolo] La Venta Esploraz Geog Assoc, Via Priamo Tron 35-F, I-31100 Treviso, Italy
推荐引用方式 GB/T 7714	De Waele, Jo,Picotti, Vincenzo,Martina, Mario L. V.,et al. Holocene evolution of halite caves in the Cordillera de la Sal (Central Atacama, Chile) in different climate conditions[J]. 中国科学院西北生态环境资源研究院,2020,370.
APA	De Waele, Jo,Picotti, Vincenzo,Martina, Mario L. V.,Brook, George,Yang, Linhai,&Forti, Paolo.(2020).Holocene evolution of halite caves in the Cordillera de la Sal (Central Atacama, Chile) in different climate conditions.GEOMORPHOLOGY,370.
MLA	De Waele, Jo,et al."Holocene evolution of halite caves in the Cordillera de la Sal (Central Atacama, Chile) in different climate conditions".GEOMORPHOLOGY 370(2020).