680
Chapter 13 Diagenesis
MAJOR PROCESSES IN VARIOUS DlAGENETIC REGIMES
DIAGENETIC
REGIME
EODIAGENESIS
(OPEN,
METEORIC)
SANDSTONES
some QZ, ± HEM
(with OM : ± 51D)
CC, DOL, HE
GYP, AH, some QZ
(with OM : ± ANK, SID)
SABKHA
NE
CALCARENTITES
CAlCRETE,
KARSTIFIC .,
MOLOS, VUGS
DOLOCRETE, WARM, DRY
SILCRETE
CC, GYP, AH, DOL ARAG , Mg CC,
some QZ + OP,
OPAL
± ANK
- - - - - - - - - - - ---- - - - - - - - -- - - - - - - - -.. - - - - - - - - - - - - - -
SHALLOW-MARINE
MARLY MUD
EARLY
MARINE
( ± OPEN)
DEEP
COMPACTION
lITTLE
CHANGE
PY
MESODIAGENESIS
(CLOSED
OR OPEN)
COMPACTION
QZ, some CC
± ANK , Fe-CC;
CONCRETIONS
± DEEPLY
CIRCULA TING
CC, ± DOL, Fe -CC, ANK
METEORIC WATER
.
"
SMEC~KAOl II~ J U :E~~~gt~~~;:A~7~r,;
- - - - - - - - - - - - - - - - - 7 / I - F R A C T U R I N G
"..
",'
LATE
DIAGENESIS
(± CLOSED)
QZ,
some CC
CARBT-DISS., 9Z-PREC .
o
QZ-DISS ., CARBT-PREC .
MINERALS
ARAG
ARAGONITE
Mg CC
Mg CALCITE
CC
CALCITE
DOL
DOLOMITE
ANK
ANKERITE
SID
SIDERITE
CARBT CARBONATE
SMEC
-ILL
KAOL + K-FELD+ILL
SMEC + MAFIC + CHL
Ca-PLAG
-ALBITE
VEIN FILLINGS
tFe-CC, CC, DOL, ANK
1 rt{) PERVASIVE DOLOMITIZATION
()
CC, Fe-CC, QZ, CLA Y MIN.
1\
AH , BA, CEL
± BITUMEN,
INFLUX OF HIGHL Y SALINE FLUIDS
BASE METALS
(Na, CI, Ca, Mg, S04' ete.)
± HYDROCARBONS ± .BASE METALS ± OPEN SYSTEM
L/
PROCESSES
QZ
QUARTZ
GYP GYPSUM
-_ DISSOLUTION
OP
OPALINE S.
AH
ANHYDRITE
,...., LEACHING, MIN . TRANSF.
FELD
FELDSPAR
BA
BARITE
~ PRESSURE SOLUTION
PLAG
PLAGIOCLASE
CEL CELESTITE
C(" GRAIN COATING
KAOL
KAOLINITE
PY
PYRITE
[!] RECRYST ALLIZATION
SMEC SMECTITE
HEM HEMATITE
[] REPLACEMENT
ILL
·ILLITE
OM ORGANIC
6) VOID FILLING
CHL
CHLORITE
MATTER
C) SECONDARY POROSITY