5 - Diagenesis

Burial Dolomitization• Dolomite may form as a replacement of aprecursor limestone• Use textural relationships to determine origin• Certain types of calcium carbonate may bepreferentially dolomitized• Dolomite may be a fracture/void spaceinfill• Problem: need mechanism for circulatinglarge volumes of Mg-rich waterDolomite replacing matrix around micritized ooidsweb.umr.edu/~greggjay/Carbonate_Page/DoloGallery/Saddle (“Baroque”) Dolomitehttp://www.uky.edu/KGS/emsweb/trenton/fieldwork.html