Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.5027/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
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ISSN | 0718-7106 |
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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