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Magnesian-skarn

A rock classification type
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A high-temperature skarn rock containing forsterite, diopside, spinel, periclase, clinohumite, phlogopite, pargasite and formed at the contacts of magmatic and calci-magnesian or magnesian carbonate rocks. Typically these rocks may also host ores of iron, base metals, Cu, Au, Fe-Mg-borates and phlogopite.


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Unique IdentifiersHide

Mindat ID:
50149
Long-form identifier:
mindat:1:1:50149:9

Classification of Magnesian-skarnHide

Sub-divisions of Magnesian-skarnHide

Mineralogy of Magnesian-skarnHide

Essential minerals - these are minerals that are required within the classification of this rock:
ClinohumiteMg9(SiO4)4F2
Mica > PhlogopiteKMg3(AlSi3O10)(OH)2
Olivine > ForsteriteMg2(SiO4)
PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
PericlaseMgO
Pyroxene > Clinopyroxene > DiopsideCaMgSi2O6
SpinelMgAl2O4
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Actinoliteâ—»Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
BruciteMg(OH)2
CalciteCaCO3
ChloriteA name commonly used for undifferentiated members of the chlorite group.
CorundumAl2O3
DellaiteCa6Si3O11(OH)2
DolomiteCaMg(CO3)2
Feldspar > Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
FoshagiteCa4(Si3O9)(OH)2
KotoiteMg3[BO3]2
LudwigiteMg2Fe3+(BO3)O2
MagnesiteMgCO3
MagnetiteFe2+Fe3+2O4
MerwiniteCa3Mg(SiO4)2
MonticelliteCaMg(SiO4)
Pyroxene > Orthopyroxene > EnstatiteMg2Si2O6
SerpentineA group of phyllosilicate minerals.
SpurriteCa5(SiO4)2(CO3)
SuaniteMg2[B2O5]
TalcMg3Si4O10(OH)2
Ă…kermaniteCa2Mg[Si2O7]

Internet Links for Magnesian-skarnHide

References for Magnesian-skarnHide

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