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FORMATION OF CARBONATE CEMENT IN CLASTIC ROCKS
Author(s) -
MURAVYOV V. I.
Publication year - 1970
Publication title -
sedimentology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.494
H-Index - 108
eISSN - 1365-3091
pISSN - 0037-0746
DOI - 10.1111/j.1365-3091.1970.tb00211.x
Subject(s) - geology , carbonate , clastic rock , cement , calcite , mineralogy , carbonate rock , recrystallization (geology) , geochemistry , illite , clay minerals , sedimentary rock , materials science , composite material , petrology , metallurgy
SUMMARY The texture of carbonate cement in clastic rocks reflects the conditions of: (1) free pore crystallization; or (2) recrystallization under elevated temperatures and pressures. Fibrous carbonate cement may be formed as a result of preferential adsorption of clay particles or colloids in the direction perpendicular to c. Cryptocrystalline carbonate cement is formed in sandstones if the ratio carbonate/ argillaceous matter in less than 5 (for montmorillonite) or less than 3–4 (for illite), especially if it is near 2–1. The maximum amounts of isomorphic admixtures of Mg and Fe in calcite cement (see Fig.2) can be used for temperature reconstructions of the epigenetical environment. In deep‐buried rocks which are almost closed systems, migration rates are lower than diffusion rates and microenvironments of detrital grain corrosion may exist adjacent to those of precipitation of the same mineral.