Erosion rates and erosion patterns of Neogene to Quaternary stratovolcanoes in the Western Cordillera of the Central Andes: An SRTM DEM based analysis

Karátson, Dávid; Telbisz, Tamás; Wörner, Gerhard

doi:10.1016/j.geomorph.2011.10.010

Cited by 52 publications

(35 citation statements)

References 63 publications

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“…2). This numerical model of landform is increasingly considered as a wealth of morphometric information from a quantitative or qualitative point of view (Iwahashi et al 2001;Li et al 2005;Iwahashi and Pike 2007;Ferraris et al 2012;Karátson et al 2012). Notwithstanding the time consuming and tedious digitizing, the results provide an acceptable model of local landform and a more detailed Thereby, a 10-m-grid DEM of Teboursouk region was produced and a model of shaded relief map was extracted using GIS spatial analysis approach and the hill (or oblique) shading method (Li et al 2005;Kennelly and Stewart 2006).…”

Section: Data Source and Drainage Hierarchizationmentioning

confidence: 99%

Morphotectonic and Morphodynamic investigations revealed by isobase surfaces analysis and derived differential mapping using GIS, Teboursouk area, northern Tunisia

Slama

Deffontaines²,

Turki

2015

Earth Sci Inform

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Teboursouk area within the northern Tunisian Atlas presents a complex and heterogeneous geological framework leading to various geomorphic landforms among them there are numerous Triassic salt extrusions having an evident impact on the topographic configuration, shaping and dynamics. Landforms characterization of the study area, by morphostructural and morphodynamic mapping, was carried out using the isobase approach which is mainly based on the construction of topographic base-level surface from each channel order. GIS environment and spatial data analysis tools have been used to perform this procedure using 10 m-grid DEM and digitized drainage network at a semi-detailed scale (1: 50 000). The analysis included the creation of isobase maps of 2nd, 3rd and 4th-order channels. Grid calculations allowed the construction of (1) a combined surface from 2nd and 3rd order and (2) a differential map which represents the topographic residual between present day surface (original DEM) and isobase of 4th order. In fact, qualitative analysis of different isobase surfaces shows a good delimitation of most morphostructures and highlights a model of an atypical morphostructure concerning the Triassic extrusion of Jebel ech Cheid (JEC). Isoline anomalies and disturbances have indicated that major morphotectonic lineaments, interpreted as fractures, trend NE-SW to NNE-SSW adapting to the regional strike-slip fault system in response to NW-SE late Alpine transpressive tectonics. Several isoline inflexions were, however, well correlated with observed tectonic fractures and some of them are considered to be closely related to basement as the 4th-order analysis demonstrates. In contrast, neotectonic features, active landforms and lineaments were quantitatively described and localized based on the differential mapping approach.

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Section: Data Source and Drainage Hierarchizationmentioning

confidence: 99%

Morphotectonic and Morphodynamic investigations revealed by isobase surfaces analysis and derived differential mapping using GIS, Teboursouk area, northern Tunisia

Slama

Deffontaines²,

Turki

2015

Earth Sci Inform

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“…Louvat and Allègre, 1997;Louvat and Allègre, 1998;Rad et al, 2006). Only a few studies have aimed to constrain the mechanical and/or total erosion affecting volcanic surfaces over a long time interval (Le Friant et al, 2004;Samper et al, 2007;Hildenbrand et al, 2008;Germa et al, 2010;Karátson et al, 2012;Salvany et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Construction and destruction rates of volcanoes within tropical environment: Examples from the Basse-Terre Island (Guadeloupe, Lesser Antilles)

Ricci¹,

Lahitte²,

Quidelleur³

2015

Geomorphology

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“…slope redeposition) as well as compaction of loose volcanogenic deposits. On the other hand, for volcanoes which have been extinct for a long time ago, the method would be different if the aim is to reconstruct their ideal (original) shape.ln the case oflong-term denudation, the rate of erosion can be estimated provided the age ofthe volcano is known (see numerical results from the Central Andes using a similar approach by Karátson et al (2012)). …”

Section: Discussionmentioning

confidence: 99%

Surface fitting in geomorphology — Examples for regular-shaped volcanic landforms

Favalli¹,

Karátson²,

Yepes³

et al. 2014

Geomorphology

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In nature. several types of landforms have simple shapes: as they evolve they tend to take on an ideal, simple geometric form such as a cone. an eIlipsoid or a paraboloid. VoIcanic landforms are possibly the best examples of this "ideal" geometry. since they develop as regular surface features due to the point-Iike (circular) or fissure-Iike (linear) manifestation of voIcanic activity. In this papero we present a geomorphometric method of fitting the "ideal" surface onto the real surface of regularshaped volcanoes through a number of case studies (Mt. Mayon. Mt. Somma. Mt. Semeru. and Mt. Cameroon). VoIcanoes with circular. as weIl as eIliptical, symmetry are addressed. For the best surface fit. we use the minimization Iibrary MINUIT which is made freely available by the CERN (European Organization for Nuclear Research). This Iibrary enables us to handle aIl the available surface data (every point of the digital elevation model) in a onestep. half-automated way regardless of the size of the dataset. and to consider simultaneously aIl the relevant parameters of the selected problem. such as the position of the center of the edifice. apex height. and cone slope. thanks to the highly performing adopted procedure. Fitting the geometric surface. along with calculating the related error. demonstrates the twofold advantage ofthe method. FirstIy. we can determine quantitatively to what extent a given voIcanic landform is regular. Le. how much it foIlows an expected regular shape. Deviations from the ideal shape due to degradation (e.g. sector coIlapse and normal erosion) can be used in erosion rate caIculations. Secondly. ifwe have a degraded volcanic landform. whose geometry is not c1ear. this method of surface fitting reconstructs the original shape with the maximum precision. Obviously. in addition to voIcanic landforms. this method is also capable of constraining the shapes of other regular surface features such as aeolian. glacial or periglacial landforms.

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Erosion rates and erosion patterns of Neogene to Quaternary stratovolcanoes in the Western Cordillera of the Central Andes: An SRTM DEM based analysis

Cited by 52 publications

References 63 publications

Morphotectonic and Morphodynamic investigations revealed by isobase surfaces analysis and derived differential mapping using GIS, Teboursouk area, northern Tunisia

Morphotectonic and Morphodynamic investigations revealed by isobase surfaces analysis and derived differential mapping using GIS, Teboursouk area, northern Tunisia

Construction and destruction rates of volcanoes within tropical environment: Examples from the Basse-Terre Island (Guadeloupe, Lesser Antilles)

Surface fitting in geomorphology — Examples for regular-shaped volcanic landforms

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