Compaction of basin sediments: Modeling based on time-temperature history
Porosity decrease of sandstones, carbonates, and shales during burial is modeled here in terms of time-temperature exposure rather than in terms of depth. Loss of porosity (ϕ) in the subsurface is represented by a power function, ϕ = A(M)B, where A and B are constants and M is a measure of integrated time-temperature history. Regression lines of carbonate and sandstone porosity upon Lopatin's time-temperature index of thermal maturity (TTI) generally fall within a rather narrow envelope whose axis is approximated by ϕ = 30(TTI)−0.33. This equation is useful for regional modeling of carbonate and sandstone compaction. Dependence of porosity upon integrated time-temperature history implies that basin sediments are not in equilibrium but compact through geologic time. Calculations show that subsidence resulting from the loss of porosity with increasing time-temperature exposure (as opposed to deeper burial) can produce a second-stage, passively formed basin containing many hundreds of meters of sediments.
Citation Information
Publication Year | 1989 |
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Title | Compaction of basin sediments: Modeling based on time-temperature history |
DOI | 10.1029/JB094iB06p07379 |
Authors | J. W. Schmoker, D. L. Gautier |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Journal of Geophysical Research Solid Earth |
Index ID | 70015342 |
Record Source | USGS Publications Warehouse |