DOI: 10.1016/j.tecto.2020.228411
论文题名: Volcano growth versus deformation by strike-slip faults: Morphometric characterization through analogue modelling
作者: Grosse P. ; Poppe S. ; Delcamp A. ; van Wyk de Vries B. ; Kervyn M.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 781 语种: 英语
中文关键词: Analogue model
; Strike-slip fault
; Tectonic deformation
; Volcano growth
; Volcano morphometry
英文关键词: Buildings
; Elongation
; Strike-slip faults
; Structural geology
; Velocity
; Volcanoes
; Analogue modeling
; Deformation feature
; Destructive process
; Morphometric characterization
; Orders of magnitude
; Preservation potential
; Tectonic deformations
; Volcano morphometry
; Fault slips
; deformation mechanism
; extensional tectonics
; fault zone
; hydrothermal vent
; morphometry
; numerical model
; strike-slip fault
; volcanic eruption
; volcanology
英文摘要: Volcanoes display diverse morphologies as a result of the complex interplay of several constructive and destructive processes. Scaled analogue models offer a tool to isolate and characterize the different processes. Here, we investigate the interplay between volcano growth and deformation caused by an underlying strike-slip fault through simple analogue models. In particular, we analyze the morphometry of analogue volcanoes resulting from different growth-to-deformation ratios. Deformation elongates the volcano edifice at an angle of 10–45° from the fault trace along the extensional quadrants and generates a summit graben structure oriented perpendicular to the edifice elongation. The overall steepness of the edifice decreases, but steep slopes are preserved or increased on the lower compressional flanks, commonly related to small avalanches. Growth can partially to totally mask these features depending on the growth rate to strike-slip velocity ratio. The summit graben is easily masked even by low growth rates, whereas edifice elongation has the best preservation potential. Scaling of the experiments suggests that at volcanoes with growth rate (km3/yr) to strike-slip velocity (km/yr) ratios ≤3.8 km3/km, deformation features should be clearly preserved, whereas at volcanoes with ratios ≥15 km3/km, deformation features should be completely masked. The typical growth rates of volcanoes (0.01 to 1 km3/ka) and the typical velocities of strike-slip faults (1 to 20 mm/yr) suggest that in nature, growth rate to strike-slip velocity ratios can range over 3 orders of magnitude, spanning both types of end-members. Using examples of both active and inactive volcanoes located on strike-slip faults with variable elongation intensities and orientations, we highlight that the analogue models account for some of the morphometric variability observed at volcanoes in nature, although the role of vent distribution can be a key factor. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170595
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina; Fundación Miguel Lillo, Miguel Lillo 251Tucumán 4000, Argentina; Department of Geography, Earth System Science, Vrije Universiteit Brussel, Pleinlaan 2B-1050, Belgium; Université Clermont Auvergne, CNRS, IRD, OPGC, Laboratoire Magmas et Volcans, Clermont-Ferrand, F-63000, France
Recommended Citation:
Grosse P.,Poppe S.,Delcamp A.,et al. Volcano growth versus deformation by strike-slip faults: Morphometric characterization through analogue modelling[J]. Tectonophysics,2020-01-01,781