globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2018.08.043
Scopus记录号: 2-s2.0-85053026789
论文题名:
Abrupt increase in the coastal uplift and earthquake rate since ∼40 ka at the northern Chile seismic gap in the Central Andes
作者: González-Alfaro J.; Vargas G.; Ortlieb L.; González G.; Ruiz S.; Báez J.C.; Mandeng-Yogo M.; Caquineau S.; Álvarez G.; del Campo F.; del Río I.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 502
起始页码: 32
结束页码: 45
语种: 英语
英文关键词: earthquake geology ; MIS 3 ; northern Chile megathrust earthquakes ; radiocarbon ; rapid coastal uplift
Scopus关键词: Deposits ; Tectonics ; Coastal uplift ; Geomorphological analysis ; Marine isotope stages ; Megathrust earthquakes ; radiocarbon ; Radiocarbon dating ; Vertical deformation ; Vertical displacements ; Earthquake effects ; Chile earthquake 2010 ; coastal zone ; deformation ; earthquake magnitude ; marine isotope stage ; radiocarbon dating ; subduction zone ; uplift ; Andes ; Chile
英文摘要: Over long-term geological scales, the position and vertical movements of the coast are considered to be among the most important effects resulting from first-order plate tectonics interactions in the subduction zones. However, the relationship between short-term vertical deformation driven by earthquakes and long-term coastal uplift in the Andean subduction contact of northern Chile has not been thoroughly elucidated to date. Based on precise radiocarbon dating and geomorphological analysis of littoral deposits in the Mejillones Peninsula at the southern edge of the major northern Chile seismic gap, we report a drastic increase in coastal uplift since marine isotope stage 3 (MIS 3) with uplift rates one order of magnitude more rapid than previously in the Late Pleistocene. Geomorphological evidence supplied by Holocene littoral deposits and marine terraces shows that this tectonic regime could be operating at present. Together with new geodetic data following the 2007 Mw7.7 Tocopilla event, these observations indicate that coastal uplift results from cumulative coseismic vertical displacement with low subsequent interseismic subsidence recovery driven by both deep-moderate and large megathrust earthquakes. We suggest that the accelerated coastal uprising and earthquake rate over the past ∼44 ka demonstrated in this work results from changes involving the entire subduction contact between the Nazca and South American plates in northern Chile. © 2018 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109632
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Departamento de Geología, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Plaza Ercilla 803, Santiago, Chile; LOCEAN, IRD, Sorbonne Universités, (CNRS, MNHN, IRD France-Nord), Bondy, France; Departamento de Ciencias Geológicas, Centro Nacional de Investigación para la Gestion Integrada de Desastres Naturales (Cigiden), Universidad Católica del Norte, Avenida Angamos 0610, Antofagasta, Chile; Departamento de Geofísica, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Blanco Encalada 2002, Santiago, Chile; Centro Sismológico Nacional, Universidad de Chile, Blanco Encalada 2002, Santiago, Chile; Departamento de Ingeniería en Geomensura y Geomática, Facultad de Ingeniería, Universidad de Antofagasta, Avenida Universidad de Antofagasta 02800, Antofagasta, Chile

Recommended Citation:
González-Alfaro J.,Vargas G.,Ortlieb L.,et al. Abrupt increase in the coastal uplift and earthquake rate since ∼40 ka at the northern Chile seismic gap in the Central Andes[J]. Earth and Planetary Science Letters,2018-01-01,502
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