globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2099
论文题名:
Motion of continental slivers and creeping subduction in the northern Andes
作者: Nocquet J.-M.; Villegas-Lanza J.C.; Chlieh M.; Mothes P.A.; Rolandone F.; Jarrin P.; Cisneros D.; Alvarado A.; Audin L.; Bondoux F.; Martin X.; Font Y.; Régnier M.; Vallée M.; Tran T.; Beauval C.; Maguiña Mendoza J.M.; Martinez W.; Tavera H.; Yepes H.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期:4
起始页码: 287
结束页码: 291
语种: 英语
Scopus关键词: continental margin ; creep ; deformation mechanism ; obliquity ; plate convergence ; subduction ; Andes ; Ecuador ; Gulf of Guayaquil ; Pacific Ocean ; Pacific Rim ; Peru
英文摘要: Along the western margin of South America, plate convergence is accommodated by slip on the subduction interface and deformation of the overriding continent. In Chile, Bolivia, Ecuador and Colombia, continental deformation occurs mostly through the motion of discrete domains, hundreds to thousands of kilometres in scale. These continental slivers are wedged between the Nazca and stable South American plates. Here we use geodetic data to identify another large continental sliver in Peru that is about 300-400 km wide and 1,500 km long, which we call the Inca Sliver. We show that movement of the slivers parallel to the subduction trench is controlled by the obliquity of plate convergence and is linked to prominent features of the Andes Mountains. For example, the Altiplano is located at the boundary of converging slivers at the concave bend of the central Andes, and the extending Gulf of Guayaquil is located at the boundary of diverging slivers at the convex bend of the northern Andes. Motion of a few large continental slivers therefore controls the present-day deformation of nearly the entire Andes mountain range. We also show that a 1,000-km-long section of the plate interface in northern Peru and southern Ecuador slips predominantly aseismically, a behaviour that contrasts with the highly seismic neighbouring segments. The primary characteristics of this low-coupled segment are shared by â ̂1/420% of the subduction zones in the eastern Pacific Rim. © 2014 Macmillan Publishers Limited. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106542
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Geoazur, IRD, Université de Nice Sophia-Antipolis, 250, Rue A. Einstein, 06560 Valbonne, France; Instituto Geofísico del Perú, Calle Badajoz 169, Urbanizacion Mayorazgo IV Etapa, Ate, 15012 Lima, Peru; IRD, Calle 17, San Isidro, 15036 Lima, Peru; Instituto Geofísico, Escuela Politécnica Nacional, LadrÓn de Guevara, 2759 Quito, Ecuador; Institut des Sciences de la Terre de Paris, Université Pierre et Marie Curie, CNRS UMR 7193, 75005 Paris, France; Instituto Geográfico Militar de Ecuador IGM-EC, Sector El Dorado, 2435 Quito, Ecuador; ISTerre, IRD, CNRS, 38041, Grenoble, France; Laboratoire des Mécanismes et Transferts en Géologie, Université Paul Sabatier, IRD, Observatoire Midi-Pyrénées , 31400 Toulouse, France; Instituto Geográfico Nacional del Perú IGN, Av. Aramburú 1190 Surquillo, 15036 Lima, Peru; Instituto Geográfico Agustín Codazzi de Colombia IGAC, Carrera 30 N48, Bogotá, Colombia; Institut de Physique du Globe de Paris, Sorbone Paris Cité, Université Paris Diderot, UMR 7154 CNRS, Paris, France

Recommended Citation:
Nocquet J.-M.,Villegas-Lanza J.C.,Chlieh M.,et al. Motion of continental slivers and creeping subduction in the northern Andes[J]. Nature Geoscience,2014-01-01,7(4)
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