publication . Article . 2011

Numerical models of salt diapir formation by down-building : the role of sedimentation rate, viscosity contrast, initial amplitude and wavelength

Lukas Fuchs; Harro Schmeling; Hemin Koyi;
Open Access English
  • Published: 01 Jan 2011
  • Publisher: Uppsala universitet, Berggrundsgeologi
  • Country: Sweden
Abstract
Formation of salt diapirs has been described to be due to upbuilding (i. e. Rayleigh-Taylor like instability of salt diapirs piercing through a denser sedimentary overburden) or syndepositional down-building process (i. e. the top of the salt diapir remains at the surface all the time). Here we systematically analyse this second end-member mechanism by numerical modelling. Four parameters are varied: sedimentation rate nu(sed), salt viscosity eta(salt), amplitude delta of the initial perturbation of the sedimentation layer and thewavenumber k of this perturbation. The shape of the resulting salt diapirs strongly depends on these parameters. Small diapirs with su...
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arXiv: Condensed Matter::Soft Condensed MatterQuantitative Biology::Biomolecules
free text keywords: Numerical solutions, Sedimentary basin processes, Diapir and diapirism, Mechanics, theory, and modelling, Earth and Related Environmental Sciences, Geovetenskap och miljövetenskap, Geochemistry and Petrology, Geophysics, Geology, Geometry, Sedimentation, Delta, Open-channel flow, Instability, Viscosity, Amplitude, Density contrast, Diapir
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