Geoscience Reference
In-Depth Information
Density (g/cm 3 )
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Range of
rock-forming
minerals
Fo
Fa
Olivines
Clinopyroxenes
Amphiboles
Micas
(Mafic)
Orthoyproxenes
Rock-forming
minerals
Ab
An
Ab
Plagioclase feldspars
(Felsic)
Quartz
Alkali feldspars
Or
Zeolites
Garnets
Staurolite
Kyanite
Andalusite
Sillimanite
Cordierite
Metamorphic
minerals
Epidote
Chlorite
Talc
Serpentine
Brucite
Dolomite
Calcite
Ab
An
Ab
Plagioclase feldspars
Quartz
Alkali feldspars
Or
Sedimentary
minerals
Illite
Montmorillonite
(Clay minerals)
Kaolinite
Anhydrite
Polyhalite
Gypsum
(Evaporites)
Halite
Sylvite
Carnallite
Fresh
Saline
Water
Pore
contents
Ice
Air
Galena
Arsenopyrite
Chalcocite
Millerite
Bornite
Pyrite
(Metal sulphides)
Pentlandite
Marcasite
Pyrrhotite
Chalcopyrite
Sphalerite
Uraninite
Cassiterite
Cuprite
Magnetite
Haematite
Monazite
Ilmenite
(Metal oxides)
Limonite
Maghaemite
Chromite
Ore minerals
Goethite
Jacobsite
Gibbsite
(Metal hydroxide)
(Metal sulphate)
Barite
(Metal silicate)
Willemite
1 2 - 20
Gold
Copper
(Native metals)
Graphite
(Carbon)
Diamond
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8.00
Density (g/cm 3 )
Figure 3.29 Density ranges of common rock-forming and ore minerals, and their likely pore contents. The shaded area corresponds with the
density range of the main rock-forming minerals shown in Fig. 3.30 . Based mainly on data in Read ( 1970 ) .
 
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