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acid
aeromagnetic anomaly
alteration
andesite
Ag
Au
basalt
base metal
basic
brecciation
caldera
Cu
dilation
diorite
epithermal
GIS
granite
g/t
horizon
hydrothermal
igneous
intermediate
intrusive
Ma
metamorphism
Mo
porphyry copper/gold
pipe
pyrite
radiometrics
serpentine
shear-couple
skarn
stockwork
stratiform
strike
stream sediment anomaly
sulphide
tectonic
tonalite
Triassic
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Igneous rock with
at least 10% free quartz.
A zone where airborne surveys show that the magnitude and orientation
of the earth's magnetic field differs from adjacent areas.
A change in the mineral composition of a rock, commonly due
to hydrothermal activity.
Volcanic rock of intermediate composition.
Silver
Gold
Volcanic rock of basic composition.
A non-precious metal, usually referring to copper, lead and
zinc.
Igneous rock with no free quartz.
Fracturing of rock resulting in a texture consisting of angular
fragments.
A large crater-like volcanic structure.
Copper.
An opening-up of fractures due to stresses in the rocks.
Igneous rock of intermediate composition.
Formed by low-temperature hydrothermal processes.
Geographic Information System, a system devised to present spatial
data in a series of compatible and interactive layers.
Coarse grained igneous rock with a high quartz content.
grams per tonne.
A well defined layer of rock with specific characteristics.
A process associated with igneous activity which involves heated
water and other fluids.
A class of rocks which have crystallised from a melt.
Igneous rock whose composition is intermediate between acid
and basic.
A body of igneous rock which has forced its way into pre-existing
rocks.
Million years ago.
Mineral, structural and textural changes to rocks, resulting
from changing conditions imposed on them.
Molybdenum.
An association of igneous rocks acting as host to large scale
low grade copper or gold mineralisation.
Any roughly cylindrical body of rock or ore.
A common iron sulphide mineral with the chemical formula FeS2.
Measured intensities of naturally occurring weakly radioactive
isotopes of potassium, uranium and thorium.
An alteration mineral derived from varieties of basic rocks.
Stresses resulting in fracturing with lateral movements of rocks
against each other.
An impure limestone altered by thermal metamorphism.
A network of (usually) quartz veinlets produced during pervasive
brittle fracture.
A mode of occurrence in which rocks or minerals are intrinsically
entrained within layered or bedded formations.
The direction on surface of an outcropping rock unit or structure.
An area of elevated metal values derived from analyses of sand
or silt samples taken from stream beds.
A mineral consisting of any metallic element when in combination
with sulphur. The commonest type of base-metal ore.
Relating to any structural or mountain-building activity in
the rocks.
A variety of diorite containing quartz.
Applied to the first period of the Mesozoic era, 203 to 248
Ma.
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