Morphometry and evolution of arc volcanoes

Grosse, Pablo; Vries, Benjamín van Wyk de; Petrinovic, Iván Alejandro; Euillades, Pablo A.; Alvarado, Guillermo E.

doi:10.1130/g25734a.1

Cited by 115 publications

(98 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The results of this study illustrate how a morphometric sub-aerial method [35,36] can be successfully adapted to the submarine environment. This should contribute to further quantitative investigations of the various seafloor elevations.…”

Section: Discussionmentioning

confidence: 91%

“…Both height and slope, and the average values, have been strongly related to the evolution of edifices towards steady state or equilibrium concave-up profiles controlled by gravity-driven mass transfer [39]. The height/basal width ratio has also been widely used in previous studies of sub-glacial and post-glacial aerial and sub-aerial volcanic environments [56,57] as well as arc volcanoes [35], and has been considered a useful profile estimator due to the fact it correlates positively with the slope, which tends to decrease with size [39]. This relationship also is evidenced in this deep submarine environment ( Figure 4C).…”

Section: Relevance Of Morphological Variables In the Geomorphometry Omentioning

confidence: 99%

“…Previous studies have suggested a striking, positive relationship in their morphological, generalized evolutionary model of arc volcanoes shapes [35]. These authors related the Pressure balance (P* = PM/PL; the balance between magma (or forced folds) pressure (PM) or (PF), in volcanoes or domes, respectively and lithostatic pressure (PL)), and the Resistance balance (R* = RE/RC; established among conduit resistance (RC) and edifice resistance (RE)), with the size and shape complexity of the edifices [35]. Pressure factors are commonly used to explain maximum edifice heights while resistance factors depend on the predominant edifice material and the degree of faulting, which are related to structural conditions [35], especially in volcanoes.…”

Section: A Morphometric Evolution Model For the Seafloor Edificesmentioning

confidence: 99%

“…The volcanoes seem also seem to The straight dashed line is the threshold used to separate domes from volcanoes; (B) Possible evolutionary growth paths of domes and volcanoes are highlighted. P* is pressure balance and R* is resistance balance, according to the model proposed by [35]. Arrows represent edifice growth trends and orange crosses represent size and shape morphometries that do not occur in the Subvent Area.…”

Section: Relevance Of Morphological Variables In the Geomorphometry Omentioning

confidence: 99%

See 3 more Smart Citations

Shape and Size Complexity of Deep Seafloor Mounds on the Canary Basin (West to Canary Islands, Eastern Atlantic): A DEM-Based Geomorphometric Analysis of Domes and Volcanoes

et al. 2018

View full text Add to dashboard Cite

Abstract:Derived digital elevation models (DEMs) are high-resolution acoustic technology that has proven to be a crucial morphometric data source for research into submarine environments. We present a morphometric analysis of forty deep seafloor edifices located to the west of Canary Islands, using a 150 m resolution bathymetric DEM. These seafloor structures are characterized as hydrothermal domes and volcanic edifices, based on a previous study, and they are also morphostructurally categorized into five types of edifice following an earlier classification. Edifice outline contours were manually delineated and the morphometric variables quantifying slope, size and shape of the edifices were then calculated using ArcGIS Analyst tools. In addition, we performed a principal component analysis (PCA) where ten morphometric variables explain 84% of the total variance in edifice morphology. Most variables show a large spread and some overlap, with clear separations between the types of mounds. Based on these analyses, a morphometric growth model is proposed for both the hydrothermal domes and volcanic edifices. The model takes into account both the size and shape complexity of these seafloor structures. Grow occurs via two distinct pathways: the volcanoes predominantly grow upwards, becoming large cones, while the domes preferentially increase in volume through enlargement of the basal area.

show abstract

Section: Discussionmentioning

confidence: 91%

Section: Relevance Of Morphological Variables In the Geomorphometry Omentioning

confidence: 99%

Section: A Morphometric Evolution Model For the Seafloor Edificesmentioning

confidence: 99%

Section: Relevance Of Morphological Variables In the Geomorphometry Omentioning

confidence: 99%

See 2 more Smart Citations

Shape and Size Complexity of Deep Seafloor Mounds on the Canary Basin (West to Canary Islands, Eastern Atlantic): A DEM-Based Geomorphometric Analysis of Domes and Volcanoes

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Following the large use of DEM, delimitation of volcanic edifices, mainly scoria cones, has been manually performed on the basis of shaded relief images and slope maps (e.g. Fornaciai et al, 2012); the use of dedicated algorithms for semi-automatic and automatic delimitation of volcanic edifices has been recently developed (Grosse et al, 2009(Grosse et al, , 2012Euillades et al, 2013). Many authors have used these data for obtaining descriptive morphometric parameters (e.g.…”

Section: Introductionmentioning

confidence: 99%

Tracing the boundaries of Cenozoic volcanic edifices from Sardinia (Italy): a geomorphometric contribution

et al. 2014

View full text Add to dashboard Cite

Abstract. Unequivocal delimitation of landforms is an important issue for different purposes, from sciencedriven morphometric analysis to legal issues related to land conservation. This study is aimed at giving a new contribution to the morphometric approach for the delineation of the boundaries of volcanic edifices, applied to 13 monogenetic volcanoes (scoria cones) related to the Pliocene-Pleistocene volcanic cycle in Sardinia (Italy). External boundary delimitation of the edifices is discussed based on an integrated methodology using automatic elaboration of digital elevation models together with geomorphological and geological observations. Different elaborations of surface slope and profile curvature have been proposed and discussed; among them, two algorithms based on simple mathematical functions combining slope and profile curvature well fit the requirements of this study. One of theses algorithms is a modification of a function introduced by Grosse et al. (2011), which better performs for recognizing and tracing the boundary between the volcanic scoria cone and its basement. Although the geological constraints still drive the final decision, the proposed method improves the existing tools for a semi-automatic tracing of the boundaries.

show abstract

Directional flank spreading at Mount Cameroon volcano: Evidence from analogue modeling

et al. 2014

View full text Add to dashboard Cite

Mount Cameroon is characterized by an elongated summit plateau, steep flanks, and topographic terraces around its base. Although some of these features can be accounted for by intrusion-induced deformation, we here focus on the contribution of edifice-scale gravitational spreading in the structure of Mount Cameroon. We review the existing geological and geophysical data and morphostructural features of Mount Cameroon and surrounding sedimentary basins. Volcanic ridge gravitational spreading is then simulated by scaled analogue models on which fault formation is recorded using digital image correlation. Three sets of models are presented (i) models recorded in cross section (Type I), (ii) models recorded from above with a uniform (Type IIa), and (iii) nonuniform ductile layer (Type IIb). Type I models illustrate the formation of faults accommodating summit subsidence and lower flank spreading. Type IIa models favor displacement perpendicular to the long axis, with formation of a summit graben and basal folds, but fail to reproduce the steep flanks. Type IIb models investigate the effect of spatial variations in sediment thickness and/or properties consistent with geological evidence. Directional spreading of the volcano's central part perpendicular to the long axis is accounted for by a sediment layer with restricted lateral extent and increasing thickness away from the volcano axis. The later model closely reproduces key features observed at Mount Cameroon: steep upper flanks are accounted for by enhanced lateral spreading of the lower flanks relative to the summit. The relevance of these findings for understanding flank instabilities at large oceanic volcanoes is finally highlighted.

show abstract

Morphometry and evolution of arc volcanoes

Abstract: International audienc

Cited by 115 publications

References 21 publications

Shape and Size Complexity of Deep Seafloor Mounds on the Canary Basin (West to Canary Islands, Eastern Atlantic): A DEM-Based Geomorphometric Analysis of Domes and Volcanoes

Shape and Size Complexity of Deep Seafloor Mounds on the Canary Basin (West to Canary Islands, Eastern Atlantic): A DEM-Based Geomorphometric Analysis of Domes and Volcanoes

Tracing the boundaries of Cenozoic volcanic edifices from Sardinia (Italy): a geomorphometric contribution

Directional flank spreading at Mount Cameroon volcano: Evidence from analogue modeling

Contact Info

Product

Resources

About