Salt tectonics, sediments and hydrocarbon prospectivity: An introduction

Stuart Archer, Geoffrey Ian Alsop, A. J. Hartley, Neil Grant, Richard Hodgkinson

Research output: Chapter in Book/Report/Conference proceedingChapter

15 Citations (Scopus)

Abstract

Salt is a crystalline aggregate of the mineral halite, which forms in restricted environments where the hydrodynamic balance is dominated by evaporation. The term is used non-descriptively to incorporate all evaporitic deposits that are mobile in the subsurface. It is the mobility of salt that makes it such an interesting and complex material to study. As a rock, salt is almost unique in that it can deform rapidly under geological conditions, reacting on slopes ≤0.58 dip and behaving much like a viscous fluid. Salt has a negligible yield strength and so is easy to deform, principally by differential sedimentary or tectonic loading. Significant differences in rheology and behavioural characteristics exist between the individual evaporitic deposits. Wet salt deforms largely by diffusion creep, especially under low strain rates and when differential stresses are low. Basins that contain salt therefore evolve and deform more complexly than basins where salt is absent. The addition of halokinetic processes to the geodynamic history of a basin can lead to a plethora of architectures and geometries. The rich variety of resultant morphologies have considerable economic as well as academic interest.
Original languageEnglish
Title of host publicationSalt Tectonics, Sediments and Prospectivity
EditorsG. I. Alsop, S. G. Archer, A. J. Hartley, N. T. Grant, R. Hodgkinson
Place of PublicationBath, UK
PublisherGeological Society of London
Pages1-6
Number of pages6
Volume363
ISBN (Print)1862393419, 9781862393417
DOIs
Publication statusPublished - 13 Feb 2012

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Archer, S., Alsop, G. I., Hartley, A. J., Grant, N., & Hodgkinson, R. (2012). Salt tectonics, sediments and hydrocarbon prospectivity: An introduction. In G. I. Alsop, S. G. Archer, A. J. Hartley, N. T. Grant, & R. Hodgkinson (Eds.), Salt Tectonics, Sediments and Prospectivity (Vol. 363, pp. 1-6). Bath, UK: Geological Society of London. https://doi.org/10.1144/SP363.1