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MECHANICALLY INDUCED STYLOLITES AND LOSS OF POROSITY IN DOLOMITES
Author(s) -
Braithwaite C. J. R.
Publication year - 1986
Publication title -
journal of petroleum geology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 42
eISSN - 1747-5457
pISSN - 0141-6421
DOI - 10.1111/j.1747-5457.1986.tb00393.x
Subject(s) - stylolite , geology , porosity , compaction , anhydrite , pressure solution , devonian , diagenesis , dissolution , mineralogy , petrology , geotechnical engineering , geochemistry , gypsum , paleontology , chemistry
Devonian dolomites are described, in which broken grains and internal crystal silts are associated with stylolites and pressure‐solution seams. These features are interpreted as resulting from a progressive mechanical collapse, following dissolution of anhydrite. The transfer of loading by failure within the rock unit was responsible for stress concentrations, which led to the initiation of the stylolites with fluids driven out by compaction. The evidence suggests occlusion of a formerly extensive, vuggy, porosity.