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Costa, Elisabetta1, Cristian Cavozzi1, Nicolò Doglioni1
(1) Università di Parma, Parma, Italy

ABSTRACT: Morphology and Kinematics of Deformed Salt-Bearing Areas Investigated by Physical Modeling

One of the more striking features found in salt bearing syndepositional deformation zones, both fold-and-thrust belts and passive margins, are represented by the arcuate shape of the deforming structures, either thrusts or normal faults, which also show complex nested pattern in map view. This kind of deformation geometry leads to the formation of small ponded basins, which strongly influence the sedimentation pattern and facies distribution that, in turn, control subsequent deformation evolution. If, in nature, this deformation behavior could be due to lateral changes in salt thickness and geometry, then models showing the same deformation geometry but having an evenly distributed viscous decollement clearly demonstrate that factors other than salt thickness variations must influence this deformation patter. Our models provide a useful tool for examining the variables that may produce this natural phenomenon.


AAPG Search and Discovery Article #90026©2004 AAPG Annual Meeting, Dallas, Texas, April 18-21, 2004.