Download Sulfide Minerals

Sulfide Minerals
• Here you will find a short summary of the
sulfides that you are studying in lab
Important Sulfide Minerals
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Pyrite
Aresonopyrite
Sphalerite
Chalcopyrite
Covellite
Galena
Pyrrhotite
Cinnabar
Molybdenite
Enargite
Oriment
Stibnite
FeS2
FeAsS
ZnS
CuFeS2
PbS
Fe1-xS
HgS
MoS
Important Sulfide Minerals
• Sulfide minerals have a restricted
composition range and solid solutions are
rare
• Most sulfides (except sphalerite) are opaque
semiconductors with metallic luster
Sulfide parageneses
• Most sulfides are deposited by
hydrothermal solutions (e.g., galena,
sphalerite, chalcopyrite). Metal cations are
transported by cl-1 complexes at high
temperature.
Sulfide parageneses
• Some are primary minerals in igneous and
metamorphic rocks (e.g., Molybdenite,
pyrrhotite) and crystallize from the magma.
• Sulfides also may form, in sediments under
the reducing conditions resulting from
decay of organic matter.
Hydroth erma Vein Depos its
hypo therm al
30 0-600
o
C
Molybd enite
Pyrrhotite
Chal cop yri te
Quartz
To urmal ine
To paz
Micas
Meso therm al
o
20 0-300 C
Sulfide Ore Mine als
Chal cop yri te
Born inte
Gale na
sp hale rite
Ars enop yri te
Gang ue Min eals
Quartz
Carbo nate s
Bari te
Epi therm al
50 -200
o
C
Cinn abar
Sti binte
Quartz
Chal ced ony
Opal
Cali cte
Pyrite
• Cubic
• Most widespread sulfide mineral. Found in
all geological environments
• Marcasite is a related polymorph formed at
low Temperature.
Pyrrhotite
• Found as accessory phase in igneous rocks.
Chalcopyrte
• Primary copper mineral,in porphyry-copper
deposits.
• Most widespread copper mineral
Arsenopyrite
• Primary arsenic mineral
Molybdenite
• Primary Molybdenum ore
• High temperature deposite
Sphalerite
• Primary ore mineral for Zn
Galena
• Primary ore mineral for Pb