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Seismic Recognition of Salt Diapirs: GEOLOGIC NOTES
AAPG Bulletin, 1979Seismic recognition of a salt diapir is usually based on a combination of features such as shape, virtual absence of reflections from the interior, lateral-diffraction patterns, characteristic salt-base reflection, seismic-interval velocities, and halokinetic relation with surrounding sediments and adjoining diapirs.
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Rim syncline volume estimation and salt diapirism
Nature, 1986Quantitative studies of salt structures are based on the assumption of a simple relationship between excess sediment volumes and the volumetric growth of salt structures. This assumption is inadequate and, instead, this article shows how the excess volume relates to the volume swept out by the deforming sediment surface and the moving salt/sediment ...
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Physical modelling of overburden deformation around salt diapirs
Tectonophysics, 1993Abstract Salt diapirs produce highly complex deformation patterns in the surrounding overburden which are difficult to image seismically or model numerically. To further the understanding of deformation around salt structures we have used physical models with brittle granular overburdens, and simulated sedimentation accompanying diapiric rise.
Ian Davison +6 more
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Classification of caprock associated with salt diapirs
2018Caprock assemblages associated with salt bodies typically consist of a vertically zoned sequence in ascending order: anhydrite directly above the salt body, a transitional gypsum zone, and occasion...
Piper Poe +5 more
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Modeling stress evolution around a rising salt diapir
Marine and Petroleum Geology, 2014Abstract We model the evolution of a salt diapir during sedimentation and study how deposition and salt movement affect stresses close to the diapir. We model the salt as a solid visco-plastic material and the sediments as a poro-elastoplastic material, using a generalized Modified Cam Clay model.
Maria A. Nikolinakou +2 more
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Origin of drag folds bordering salt diapirs
AAPG Bulletin, 2003Drag folds bordering salt diapirs are commonly attributed to shear from rising salt. Finite-element models demonstrate that shear deformation is only significant for extremely weak overburdens, such as those having high overpressure and ductile interlayers. Protrusions of overburden into and onto the diapir are most susceptible to folding.
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Gravity Anomalies Over Salt Diapirs, Northern Spain
1968Approximate calculations have been made of the magnitude and form of anomalous masses required to account for the residual gravity anomalies over four diapiric structures in northern Spain. The Orduña diapir has a simple negative anomaly and apparently is caused by a salt intrusion.
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Molding of Salt Diapirs by Stiff Overburden
1995Although active diapirs must deform the overburdens they pierce, the shape of passive (downbuilt or syndepositional) diapirs is formed or molded by their overburdens. Molding of salt diapirs is simplified here to profiles of diapirs entirely downbuilt in effectively rigid overburden.
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Kinematics within the Kłodawa salt diapir, central Poland
Geological Society, London, Special Publications, 1996Abstract The Kłodawa salt diapir consists of deformed Zechstein rock salts, with subordinate anhydrite, dolomite and shales. Upward movement of these rocks and the structural evolution of the diapir started in the Triassic and continued at least until the Tertiary.
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New Classification of Caprock Associated with Salt Diapirs
2018Caprock assemblages associated with salt bodies typically consist of a vertically zoned sequence in ascending order: anhydrite directly above the salt body, a transitional gypsum zone, and occasionally a complex zone of limestone and/or dolomite. Caprock forms when the upper part of a rising diapir is exposed to a crossflow of NaCl-undersaturated water,
Giles, Katherine +5 more
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