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Domain for alteration DESCRIPTION of RESULT entity
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References
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Jackson, J.A. (ed.) 1997, Glossary of Geology, 4th edn., American
Geological Institute, Virginia, 769p
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Ryburn, R.J., Bond, L.D. & Hazell, M.S. 1995, Guide to OZROX
AGSO's Field Geology Database, AGSO Record 1995/79, Australian
Geological Survey Organisation, Canberra.
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Visser, W.A. 1980, Geological Nomenclature. Royal Geological
and Mining Society of the Netherlands. Martinus Nijhoff. 539 p.
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Qualifier 1:
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Qualifier 2:
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Note:
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|
Attribute |
Code |
Parent |
Category |
|
Synonyms |
Description |
Qualifier 1 |
Qualifier 2 |
|
alteration |
UND |
|
undefined |
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|
an alteration assemblage exists but of unknown type |
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|
alteration |
FELD |
|
feldspathic |
|
|
alteration to a feldspar group mineral |
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|
alteration |
ADU |
FELD |
|
adularia |
|
alteration to the alkali feldspar adularia |
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|
alteration |
AB |
FELD |
|
albitic |
spilite |
alteration by albite plagioclase typically replacing a more calcic
plagioclase |
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|
alteration |
ALU |
|
alunitic |
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|
alteration by alunite typically in feldspathic igneous rocks |
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|
alteration |
AR |
|
argillic |
|
|
alteration to clay group minerals |
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|
alteration |
KLN |
AR |
|
kaolinitic |
|
alteration of minerals especially feldspars and micas to form kaolin |
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|
alteration |
AMPH |
|
amphibole |
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|
alteration to an amphibole mineral |
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alteration |
CARB |
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carbonate |
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alteration into carbonates or bicarbonates by carbon dioxide in fluids |
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alteration |
CL |
|
chloritic |
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|
alteration to chlorite |
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alteration |
EP |
|
epidotised |
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|
alteration to epidote, typically in metamorphic processes |
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alteration |
GRSN |
|
greisen |
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hydrothermal alteration where feldspar and muscovite are converted
to quartz, topaz, tourmaline and lepidolite assemblage |
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alteration |
MICA |
|
micaceous |
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|
alteration to mica group mineral |
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|
alteration |
BT |
MICA |
|
biotite |
|
alteration to biotite mica |
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alteration |
SERI |
MICA |
|
sericitic |
phyllic |
alteration involving pervasive replacement of silicates by sericite
mica |
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alteration |
POT |
|
potassic |
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alteration resulting from potassium metasomatism characterised by
orthoclase, biotite, sericite and quartz |
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alteration |
PR |
|
propylitic |
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assemblage of epidote, chlorite, Mg-Fe-Ca carbonates resulting from
low pressure-temperature alteration |
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|
alteration |
PY |
|
pyritic |
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|
alteration by iron sulphide pyrite |
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alteration |
RR |
|
ferruginous |
|
red rock |
alteration containing iron oxides |
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alteration |
HEM |
RR |
|
hematitic |
|
alteration to hematite iron mineral |
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alteration |
SAUS |
|
saussurite |
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|
alteration to fine grained aggregate of zoisite, epidote, albite,
calcite, sericite and zeolites |
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|
alteration |
SCP |
|
scapolite |
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alteration to scapolite, typically from basic plagioclase feldspars |
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alteration |
SI |
|
silicified |
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alteration where silica content eg quartz, chalcedony, jasper increases |
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alteration |
SK |
|
skarn |
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alteration of limestone or dolomite to lime bearing silicates by introduction
of Si, Al, Fe and Mg |
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alteration |
SRP |
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serpentinised |
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alteration where magnesium rich silicates such as olivine or pyroxenes
are hydrated to serpentine minerals |
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alteration |
TOUR |
|
tourmaline |
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|
alteration to tourmaline |
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alteration |
UL |
|
unaltered |
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rock is not visibly altered |
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alteration |
URL |
|
uralitic |
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|
alteration of pyroxene into hornblende, usually as a fine fibrous
aggregate |
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alteration |
ZEOL |
|
zeolitic |
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alteration to hydrous aluminosilicates zeolites |
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alteration |
ANL |
ZEOL |
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analcime |
|
alteration of feldspars or feldspathoids by analcime zeolite, usually
in igneous rocks |
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alteration |
UNK |
|
unknown |
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existence of alteration assemblages is unknown |
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Domain for QUALIFIER for alteration DESCRIPTION of RESULT entity (Alteration
Intensity)
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Qualifier 1:
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Qualifier 2:
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Note:
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Attribute |
Code |
Parent |
Category |
|
Synonyms |
Description |
Qualifier 1 |
Qualifier 2 |
|
alteration_intensity |
I |
|
intense |
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|
material is intensely altered |
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alteration_intensity |
MOD |
|
moderate |
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material is moderately altered |
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alteration_intensity |
PEV |
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pervasive |
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|
material is altered throughout |
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alteration_intensity |
ST |
|
strong |
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|
material is strongly altered |
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alteration_intensity |
WK |
|
weak |
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|
material is weakly altered |
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alteration_intensity |
UNK |
|
unknown |
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|
extent of alteration is unknown |
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