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Paragenetic Mode 7 : Ultramafic igneous rocks

Return to the list of paragentic modes

Description

Ultramafic igneous rocks, including peridotite, pyroxenite, and komatiite, are dominated by ferromagnesian minerals and lack significant plagioclase.

Stage

Stage 3a: Earth’s earliest Hadean crust - Age: >4.50 Ga
7 : Ultramafic igneous rocks
8 : Mafic igneous rocks
9 : Lava/xenolith minerals (hornfels, sanidinite facies)
10 : Basalt-hosted zeolite minerals
11 : Volcanic fumarole minerals; reduced phases (see also #45)

Minerals

Click on a button to filter by elements. Green = must include. Black = must exclude. Mineral names listed in bold are exclusively known from this paragenetic mode.

MineralFormulaCrystal System
Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2Monoclinic
AegirineNaFe3+Si2O6Monoclinic
Aegirine-augite(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6Monoclinic
AlbiteNa(AlSi3O8)Triclinic
Allabogdanite(Fe,Ni)2POrthorhombic
AlumovesuvianiteCa19AlAl4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9Tetragonal
AnyuiiteAuPb2Tetragonal
Armalcolite(Mg,Fe2+)Ti2O5Orthorhombic
AspidoliteNaMg3(AlSi3O10)(OH)2Monoclinic
Augite(CaxMgyFez)(Mgy1Fez1)Si2O6Monoclinic
BaddeleyiteZrO2Monoclinic
BatisiteBaNaNaTi2(Si4O12)O2Orthorhombic
BortnikovitePd4Cu3ZnTetragonal
BowieiteRh2S3Orthorhombic
BowlesitePtSnSOrthorhombic
BultfonteiniteCa2(HSiO4)F·H2OTriclinic
CalciteCaCO3Trigonal
Carmichaelite(Ti,Cr,Fe)[O2-x(OH)x]Monoclinic
CebolliteCa5Al2(SiO4)3(OH)4Orthorhombic
ChondroditeMg5(SiO4)2F2Monoclinic
Chromio-pargasiteNaCa2(Mg4Cr)(Si6Al2)O22(OH)2Monoclinic
ChromiteFe2+Cr3+2O4Isometric
ChromiumCrIsometric
ClinohumiteMg9(SiO4)4F2Monoclinic
commodity:TinSn
CorundumAl2O3Trigonal
DamiaoitePtIn2Isometric
DanbaiteCuZn2Isometric
DesautelsiteMg6Mn3+2(OH)16[CO3]·4H2OTrigonal
DiopsideCaMgSi2O6Monoclinic
DjerfisheriteK6(Fe,Cu,Ni)25S26ClIsometric
EnstatiteMg2Si2O6Orthorhombic
Ferhodsite(Fe,Rh,Ni,Ir,Cu,Pt)9S8Tetragonal
FerronickelplatinumPt2FeNiTetragonal
FluorotetraferriphlogopiteKMg3(Fe3+Si3O10)F2Monoclinic
ForsteriteMg2SiO4Orthorhombic
FreudenbergiteNa2(Ti,Fe)8O16Monoclinic
GeikieliteMgTiO3Trigonal
GenkinitePt4Sb3Tetragonal
GoldAuIsometric
GraphiteCHexagonal
GupeiiteFe3SiIsometric
Haxonite(Fe,Ni)23C6Isometric
HeazlewooditeNi3S2Trigonal
HercyniteFe2+Al2O4Isometric
Hollingworthite(Rh,Pt,Pd)AsSIsometric
HoromaniteFe6Ni3S8Tetragonal
HumiteMg7(SiO4)3F2Orthorhombic
IlmeniteFe2+TiO3Trigonal
InaglyiteCu3Pb(Ir,Pt)8S16Hexagonal
IronFeIsometric
IsoferroplatinumPt3FeIsometric
Isovite(Cr,Fe)23C6Isometric
Jeppeite(K,Ba)2(Ti,Fe)6O13Monoclinic
KalsiliteKAlSiO4Hexagonal
KashiniteIr2S3Orthorhombic
KirschsteiniteCaFe2+SiO4Orthorhombic
KitagohaitePt7CuIsometric
KonderiteCu3Pb(Rh,Pt,Ir)8S16Hexagonal
KrotiteCaAl2O4Monoclinic
KuliginiteFe3Mg(OH)6Cl2Trigonal
LauriteRuS2Isometric
LiebenbergiteNi2SiO4Orthorhombic
LinzhiiteFeSi2Tetragonal
Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2Monoclinic
MagnesiochromiteMgCr2O4Isometric
MagnesiovesuvianiteCa19MgAl4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10](OH)(OH)9Tetragonal
Manaevite-(Ce)(Ca13Ce4[H2O]2)Mg(Al3Mg)(Mg3Ti3Fe3+2)(◻4)◻[Si2O7]4[(SiO4)8(H4O4)2]O(OH)9Tetragonal
MannarditeBa(Ti4+6V3+2)O16Tetragonal
MariinskiteBeCr2O4 Orthorhombic
MayingiteIrBiTeIsometric
Melliniite(Ni,Fe)4PIsometric
MerenskyitePdTe2Trigonal
Michitoshiite-(Cu)Rh(Cu1-xGex) Isometric
MoissaniteSiCHexagonal
MonticelliteCaMgSiO4Orthorhombic
MountainiteKNa2Ca2[Si8O19(OH)]·6H2OMonoclinic
NoonkanbahiteBaKNaTi2(Si4O12)O2Orthorhombic
NorbergiteMg3(SiO4)F2Orthorhombic
NullaginiteNi2(CO3)(OH)2Monoclinic
Omphacite(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6Monoclinic
OsborniteTiNIsometric
OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2Monoclinic
PalladosilicidePd2SiHexagonal
PaolovitePd2SnOrthorhombic
PectoliteNaCa2Si3O8(OH)Triclinic
Pentlandite(NixFey)Σ9S8Isometric
PerovskiteCaTiO3Orthorhombic
PhlogopiteKMg3(AlSi3O10)(OH)2Monoclinic
PlatarsitePt(As,S)2Isometric
PokrovskiteMg2(CO3)(OH)2Monoclinic
PolkanoviteRh12As7Hexagonal
PotaritePdHgTetragonal
Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2Monoclinic
Potassic-jeanlouisiteK(NaCa)(Mg4Ti)Si8O22O2Monoclinic
Potassic-pargasiteKCa2(Mg4Al)(Si6Al2)O22(OH)2Monoclinic
Potassic-richterite{K}{CaNa}{Mg5}Si8O22(OH)2Monoclinic
Proto-anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2Orthorhombic
PyropeMg3Al2(SiO4)3Isometric
QingsongiteBNIsometric
QusongiteWCHexagonal
RedledgeiteBa(Ti4+6Cr3+2)O16Tetragonal
RhodesiteKHCa2Si8O19·5H2OOrthorhombic
RhodplumsiteRh3Pb2S2Trigonal
RichteriteNa(NaCa)Mg5(Si8O22)(OH)2Monoclinic
RutileTiO2Tetragonal
Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2Orthorhombic
ShortiteNa2Ca2(CO3)3Orthorhombic
Shuiskite-(Cr)Ca2Cr3+Cr3+2[Si2O6OH][SiO4](OH)2OMonoclinic
Shuiskite-(Mg)Ca2MgCr3+2[Si2O6OH][SiO4](OH)2(OH)Monoclinic
SilverAgIsometric
StistaiteSnSbTrigonal
TalcMg3Si4O10(OH)2Triclinic
TausoniteSrTiO3Isometric
Tetra-auricuprideAuCuTetragonal
TetraferroplatinumPtFeTetragonal
TheophrastiteNi(OH)2Trigonal
TitaniumTiHexagonal
TomamaeiteCu3PtIsometric
TongbaiteCr3C2Orthorhombic
TrevoriteNi2+Fe3+2O4Isometric
TroiliteFeSHexagonal
Tschermakite◻(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2Monoclinic
TsikourasiteMo3Ni2P1+xIsometric
TulameenitePt2CuFeTetragonal
TungstenWIsometric
Westerveldite(Fe,Ni,Co)AsOrthorhombic
YixunitePt3InIsometric
ZhanghengiteCuZnIsometric
ElementCountPercent
HHydrogen2821.71%
BeBeryllium10.78%
BBoron10.78%
CCarbon118.53%
NNitrogen21.55%
OOxygen7155.04%
FFluorine86.20%
NaSodium1713.18%
MgMagnesium3728.68%
AlAluminium1914.73%
SiSilicon4937.98%
PPhosphorus32.33%
SSulfur1511.63%
ClChlorine21.55%
KPotassium1410.85%
CaCalcium2922.48%
TiTitanium1914.73%
VVanadium10.78%
CrChromium118.53%
MnManganese10.78%
FeIron3527.13%
CoCobalt10.78%
NiNickel1511.63%
CuCopper129.30%
ZnZinc32.33%
GeGermanium10.78%
AsArsenic43.10%
SrStrontium10.78%
ZrZirconium10.78%
NbNiobium10.78%
MoMolybdenum10.78%
RuRuthenium10.78%
RhRhodium75.43%
PdPalladium64.65%
AgSilver10.78%
InIndium21.55%
SnTin43.10%
SbAntimony21.55%
TeTellurium21.55%
BaBarium64.65%
CeCerium10.78%
WTungsten21.55%
IrIridium53.88%
PtPlatinum1511.63%
AuGold32.33%
HgMercury10.78%
PbLead43.10%
BiBismuth10.78%

References

Hazen, Robert M., Morrison, Shaunna M. (2022) On the paragenetic modes of minerals: A mineral evolution perspective. American Mineralogist, 107 (7) 1262-1287 doi:10.2138/am-2022-8099
 
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