Because, nearly all CO3 rocks that have been buried to any reasonable depth have diagentic features it is imprortant to consider these among other points realting to the diagenesis of carbonate rocks.
| CCCD | lysocline |
| aragonite rich mud | beachrock |
| groundwater residence time |
magnesian or high magnesian calcite is not dolomite
cementation location
| meteoric regime | seafloor-shallow marine | deep subsurface |
diagenesis facies
| vadose | beachrock | sea floor |
| reef | deep-burial |
Sparry CementationControls
| organic activity | crystal formation rate |
| temperature | Mg/Na ion ratio |
Sparry calcite cements should be compared with illustrations in the text.
The nomenclature of sparry cement varies slightly with different authors.
| granular/mosaic/blocky | blocky |
| fibrous | granular |
| bladed | |
| syntaxial | drusy/syntaxial rim |
Porosity an be either primary or secondary;
Secondary features can be determined using the Law of Cross-Cutting Relations.
neomorphism
How to distinguish spar cement from neomorphic spar in thin section
dolomitization & dedolomitization
For more ideas from Roger Suthren click here
RBJ 12/04