Arid
DOI10.5027/andgeoV37n1-a04
Tectonic and climatic effects in the morphologic configuration of the coastal relief of northern Chile
Quezada, Jorge1,2; Cerda, Jose Luis3; Jensen, Arturo3
通讯作者Quezada, Jorge
来源期刊ANDEAN GEOLOGY
ISSN0718-7106
出版年2010
卷号37期号:1页码:78-109
英文摘要

Tectonic and climatic effects in the morphologic configuration of the coastal relief of northern Chile. This work analyzes the morphological features of the western margin of the northern Chile Coastal Cordillera, characterized by the presence of a major Coastal Cliff. The main purpose of this research is to better understand the tectonic and climatic controls oil the topography. The methodology used consists basically of a detailed Study of the topography with quantitative geomorphic indexes such as incision grade, hypsometric curves and integrals, thalweg profiles and sinuosity index. These are applied to digital elevation models and satellite images. The main results show that the topography of the western margin of the Coastal Cordillera, exhibits,in increasing intensity of the erosion with latitude. This increment is non Uniform. The tectonic processes that produced coastal subsidence/uplift and fault activity, and the erosion of the paleotopography of Coastal Cordillera due to processes related with the construction of the Coastal Cliff and increasing rainfall, modify the morphology of the coastal border of northern Chile. The existence and conservation of the Coastal Cliff results from the existance of non-equilibrium between the uplift and erosion rates. Both rates have one-two order magnitude difference, controlled by the extreme hyperarid climate of the Atacama Desert. These conditions prevailed at least for the last 2 m.yrs. The variations in the intensity of the erosion from north to South are interpreted as the result of the southward increase in precipitacion by one order of Magnitude.


英文关键词Geomorphology Northern Chile Coastal Cliff Tectonics Climate
类型Article
语种西班牙语
国家Chile
收录类别SCI-E
WOS记录号WOS:000274067300004
WOS关键词SEA-LEVEL CHANGES ; ATACAMA DESERT ; CENTRAL ANDES ; FORE-ARC ; FAULT ZONE ; DEFORMATION ; ANTOFAGASTA ; NEOGENE ; UPLIFT ; CORDILLERA
WOS类目Geology
WOS研究方向Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/163171
作者单位1.Univ Concepcion, Dept Ciencias Tierra, Concepcion, Chile;
2.Univ Catolica Norte, Dept Ciencias Tierra, Antofagasta, Chile;
3.Univ Catolica Norte, Dept Ciencias Geol, Antofagasta, Chile
推荐引用方式
GB/T 7714
Quezada, Jorge,Cerda, Jose Luis,Jensen, Arturo. Tectonic and climatic effects in the morphologic configuration of the coastal relief of northern Chile[J],2010,37(1):78-109.
APA Quezada, Jorge,Cerda, Jose Luis,&Jensen, Arturo.(2010).Tectonic and climatic effects in the morphologic configuration of the coastal relief of northern Chile.ANDEAN GEOLOGY,37(1),78-109.
MLA Quezada, Jorge,et al."Tectonic and climatic effects in the morphologic configuration of the coastal relief of northern Chile".ANDEAN GEOLOGY 37.1(2010):78-109.
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