Volume changes during diagenesis |
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| Authors: | Michael A Addis Mervyn E Jones |
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| Institution: | Department of Geology, King''s College, Strand, London WC2 2LS, UK |
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| Abstract: | The literature pertaining to volume change during diagenesis of clastic sediments is reviewed with respect to the problem of calculating pre- and syn-compaction thicknesses of sediments for basin reconstruction and stragraphic correlation studies. Four major mechanisms for volume change are identified: mechanical compaction, mechanical dissolution, chemical dissolution and phase change. The first two of these are found to be strongly dependent on the effective stress whilst the latter two show at least a pressure dependence. Quantification of the relationships between porosity and depth of burial of a sediment seems to be possible only for specific examples of the first of these processes at present. This quantification is dealt with in the accompanying related publication. |
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| Keywords: | Argillaceous sediment Clay Compaction Consolidation Dissolution Effective stress Overpressures Permeability Phase change Porosity Sands |
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