干旱区生态环境知识资源中心(Arid): Recent tectonic activity along the Bucaramanga Fault System (Chicamocha River Canyon, Eastern Cordillera of Colombia): a geomorphological approach

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DOI	10.1127/zfg/2019/0630
	Recent tectonic activity along the Bucaramanga Fault System (Chicamocha River Canyon, Eastern Cordillera of Colombia): a geomorphological approach
	Garcia-Delgado, Helbert 1; Villamizar, Nicolas 1,2; Bernet, Matthias 3
通讯作者	Garcia-Delgado, Helbert
来源期刊	ZEITSCHRIFT FUR GEOMORPHOLOGIE
ISSN	0372-8854
出版年	2019
卷号	62 期号:3 页码:199-215
英文摘要	Tectonic geomorphology and geomorphic indices are nowadays one of the most used tools to quantify landscape response to recent tectonic activity and thus to study active faulting in orogens around the world. Based on this, a tectonic geomorphology study was conducted on the Bucaramanga Fault System (BFS) at the Chicamocha Canyon, which is structurally controlled by the Bucaramanga fault along a 36 km long section. The Chicamocha Canyon is one of the most striking landforms in the Colombian Andes, and its local environmental conditions, i.e., semi-arid climate and poorly vegetated slopes make it an outstanding laboratory to study Earth surface processes avoiding typical humid conditions. In this work, several geomorphic indices like the Hypsometric Integral (HI), the Asymmetry Factor (AF), the Ratio of Valley Floor to Valley Height (Vf), the Drainage Basin Shape index (Bs), and the Normalized Concavity Steepness (ksn) in 27 drainage basins of the Chicamocha Basin as well as channel width and slope measurements along the Chicamocha River are presented. From these indices, it was observed that drainage basins on the upthrown fault block of the Bucaramanga Fault, especially those located in southern segments between Cepita and Ricaurte, show recent tectonic surface uplift characterized by high HI, low Vf, and high ksn values. Tectonic-induced rejuvenation in some drainage basins like the Perchiquez, Guaca and Negro rivers, formed several geomorphic features such as deep V-shaped valleys, deflected drainages, barbed drainages and a regional tilting towards the NW. Besides this, threshold hillslopes reached after tectonic uplift in some drainage basins are expressed by intense landsliding in the form of debris and rock-slides, debris avalanches and debris flows, which in turn have modified the landscape of the Chicamocha canyon. Geomorphic indices obtained on the western block of the BFS hint at relatively low tectonic activity, even so recent surface uplift within three drainage basins in the San Miguel area seems to be associated with a Riedel-type structure of the Bucaramanga Fault. This work proposes a fault segmentation of the Bucaramanga Fault along the Chicamocha canyon, thus providing new evidence for the recent tectonic activity of this fault system.
英文关键词	Santander Massif Tectonic Geomorphology Landslides Erosion Landscape Evolution active faults
类型	Article
语种	英语
国家	Colombia ; France
收录类别	SCI-E
WOS记录号	WOS:000501540400003
WOS关键词	CENTRAL SANTANDER MASSIF ; NORTHERN ANDES ; THRESHOLD HILLSLOPES ; MAGDALENA VALLEY ; ROCK-UPLIFT ; EVOLUTION ; INCISION ; BASIN ; THERMOCHRONOLOGY ; METAMORPHISM
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
EI主题词	2019-12-01
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/2XILL650/311035
作者单位	1.Serv Geol Colombiano, Diagonal 53 34-53, Bogota, Colombia; 2.Univ Nacl Colombia, Dept Geociencias, Cra 20 45-03, Bogota, Colombia; 3.Univ Grenoble Alpes, CNRS, Inst Sci Terre, Grenoble, France
推荐引用方式 GB/T 7714	Garcia-Delgado, Helbert,Villamizar, Nicolas,Bernet, Matthias. Recent tectonic activity along the Bucaramanga Fault System (Chicamocha River Canyon, Eastern Cordillera of Colombia): a geomorphological approach[J]. French National Research Institute for Sustainable Development,2019,62(3):199-215.
APA	Garcia-Delgado, Helbert,Villamizar, Nicolas,&Bernet, Matthias.(2019).Recent tectonic activity along the Bucaramanga Fault System (Chicamocha River Canyon, Eastern Cordillera of Colombia): a geomorphological approach.ZEITSCHRIFT FUR GEOMORPHOLOGIE,62(3),199-215.
MLA	Garcia-Delgado, Helbert,et al."Recent tectonic activity along the Bucaramanga Fault System (Chicamocha River Canyon, Eastern Cordillera of Colombia): a geomorphological approach".ZEITSCHRIFT FUR GEOMORPHOLOGIE 62.3(2019):199-215.