干旱区生态环境知识资源中心(Arid): Giant landslide triggerings and paleoprecipitations in the Central Western Andes: The aricota rockslide dam (South Peru)

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DOI	10.1016/j.geomorph.2019.106932
	Giant landslide triggerings and paleoprecipitations in the Central Western Andes: The aricota rockslide dam (South Peru)
	Delgado, Fabrizio 1,2,3; Zerathe, Swann 2; Audin, Laurence 2; Schwartz, Stephane 2; Benavente, Carlos 3; Carcaillet, Julien 2; Bourles, Didier L.4; Team, Aster 4
通讯作者	Zerathe, Swann
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2020
卷号	350
英文摘要	The central part of the Western Andes holds an exceptional concentration of giant paleolandslides involving very large volumes of rock material (v > km(3)). While those gravitational slope failures are interpreted consensually as an erosional response to the geodynamic activity of the Andes (relief formation and tectonic activity), the question of their triggering mechanisms remains enigmatic. To clarify the respective roles of climatic versus seismic forcing on the Andean landslides, new temporal constraints on paleo movements are essential. Here, we focus on one of those giant slope failures, the Aricota giant rockslide that damned the Locumba valley in southern Peru. We conducted fieldwork, high-resolution DEM analysis and cosmogenic nuclide dating to decipher its development history and failure mechanisms. Our results point to the occurrence of two successive events. A giant failure mobilizing a rock volume of ca. 2 km(3) first produced a dam at 17.9 +/- 0.7 ka. Considering its height of ca. 600 m, the Aricota rockslide dam is one of the three largest landslide dams worldwide. At 12.1 +/- 0.2 ka, a second event produced ca. 0.2 km(3) of material, and the rock-avalanche debris spread out over the dam. As the chronology of those two events is pointing to the two main paleoclimatic pluvial periods in this region (Heinrich Stadial 1a and Younger Dryas), we favor the interpretation of a climatic forcing. At a regional scale, the concomitant aggradation of alluvial terraces and fan systems along the nearby valleys highlights higher regional erosion, sediments supply and mass-wasting events during those paleoprecipitation events and strengthens this conclusion. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	Giant landslide dam Central Western Andes Be-10 dating Triggering factors
类型	Article
语种	英语
国家	Peru ; France
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000532088300028
WOS关键词	NORTHERN CHILE ; FORE-ARC ; CANYON INCISION ; ROCK AVALANCHES ; ATACAMA DESERT ; MIOCENE AGE ; UPLIFT ; CLIMATE ; EARTHQUAKE ; EVOLUTION
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	French National Research Institute for Sustainable Development
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318843
作者单位	1.Pontificia Univ Catolica Peru, Fac Ciencias & Ingn, Especialidad Ingn Geol, Av Univ 1801, Lima 15088, Peru; 2.Univ Savoie Mt Blanc, Univ Grenoble Alpes, ISTerre, IFSTTAR,CNRS,IRD, F-38000 Grenoble, France; 3.Inst Geol, Minero & Metalurg INGEMMET, Av Canada 1470, Lima, Peru; 4.Aix Marseille Univ, Technopole Environm Arbois Mediterranee, CNRS, IRD,Coll France,UM 34 CEREGE, BP80, F-13545 Aix En Provence, France
推荐引用方式 GB/T 7714	Delgado, Fabrizio,Zerathe, Swann,Audin, Laurence,et al. Giant landslide triggerings and paleoprecipitations in the Central Western Andes: The aricota rockslide dam (South Peru)[J]. French National Research Institute for Sustainable Development,2020,350.
APA	Delgado, Fabrizio.,Zerathe, Swann.,Audin, Laurence.,Schwartz, Stephane.,Benavente, Carlos.,...&Team, Aster.(2020).Giant landslide triggerings and paleoprecipitations in the Central Western Andes: The aricota rockslide dam (South Peru).GEOMORPHOLOGY,350.
MLA	Delgado, Fabrizio,et al."Giant landslide triggerings and paleoprecipitations in the Central Western Andes: The aricota rockslide dam (South Peru)".GEOMORPHOLOGY 350(2020).