DIAGENESIS Flashcards
occurs in the form of syntaxial quartz overgrowths in which the silica that precipitates from pore solutions that initially nucleates on a pre-existing detrital quartz grain.
SILICA MINERALS
most abundant type of silica cement
QUARTZ
Most abundant in sandstones and gravelstones
CARBONATE MINERALS
most abundant carbonate mineral cement
CALCITE
Third most common cementing agents
IRON OXIDES & HYRDOXIDES
chief iron oxide and hydroxide cements
Hematite, goethite, and limonite
Occurs in feldspar-rich detrital sedimentary rocks as arkosic sandstones and gravelstones
FELDSPARS
Clay mineral stabilities strongly controlled by temperature and pH
CLAY MINERALS
shallow diagenesis that occurs shortly after burial
EODIAGENESIS
deeper diagenesis
MESODIAGENESIS
shallow diagenesis that occurs as sedimentary rocks approach the surface due to erosion
TELODIAGENESIS