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Queen Alexandra Range 94204 meteorite, Queen Alexandra Range, Victoria Land, Eastern Antarctica, Antarcticai
Regional Level Types
Queen Alexandra Range 94204 meteoriteMeteorite Fall Location
Queen Alexandra RangeMountain Range
Victoria LandRegion
Eastern AntarcticaRegion
AntarcticaContinent

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Latitude & Longitude (WGS84):
84° South , 168° East
Latitude & Longitude (decimal):
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:
Other/historical names associated with this locality:
QUE 94204


Enstatite-rich Meteorite (EH7 Chondrite or achondrite??)
1994 find, 2.43 kg, weathered

Queen Alexander Range 94204 (QUE 94204) is a coarse-grained, unbrecciated Enstatite-rich stone (~70 vol%) accompanied by significant amounts of Fe-Ni metal, Troilite, and Plagioclase. Weathering products suggest an even larger initial metal component (~20%?). A number of minor phases - daubréelite, niningerite, oldhamite, schreibersite - frequently found in Enstatite Chondrites and/or Enstatite Achondrites have been reported by one or more observers. Severe weathering complicates the issue as metal, most oldhamite, and other reduced minerals have been replaced by terrestrial weathering products (e.g., calcite, goethite…). Still, the equigranular rounded Enstatite crystals and interstitial phases have been brought at least to the point of melting. In fact, QUE 94204 is but one of several enstatite-rich meteorites found as the Antarctic site which display magmatic textures.

However, such differences due to small sample size, intrinsic inhomogeneities, and differential weathering are relative minor problems expected with most meteorite finds. Classifying QUE 94204 has, however, presented major difficulties. Initially classified as an EH7 Enstatite Chondrite and still so listed at the Meteoritical Bulletin Database, Izawa et al., (2011) classified QUE 94204 as a 'Primitive Enstatite Achondrite' while van Niekerk et al., (2014) argue that QUE 94204 is best described as an 'Anomalous Enstatite Achondrite.' These and other disagreements about these ancient objects suggests about that our assumptions about their nature and formational environment are still incomplete.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


16 valid minerals.

Meteorite/Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: van Niekerk, D., Keil, K. & Humayan, M. (2014) Petrogenesis of anomalous Queen Alexandra Range enstatite meteorites and their relation to enstatite chondrites, primitive enstatite achondrites, and aubrites: Meteoritics & Planetary Science 49 (3): 295-312. (March 2014)
Albite var. Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Reference: van Niekerk, D., Keil, K. & Humayan, M. (2014) Petrogenesis of anomalous Queen Alexandra Range enstatite meteorites and their relation to enstatite chondrites, primitive enstatite achondrites, and aubrites: Meteoritics & Planetary Science 49 (3): 295-312. (March 2014)
Calcite
Formula: CaCO3
Description: Terrestrial weathering product (esp. frequent in oldhamite-bearing meteorite finds)
Reference: Enstatite; Calcite, Clinoenstatite, Cristobalite, Daubréelite, Goethite, Gypsum, Nickel-iron, Plagioclase, Kamacite, Schreibersite , Troilite
Clinoenstatite
Formula: MgSiO3
Reference: Enstatite; Calcite, Clinoenstatite, Cristobalite, Daubréelite, Goethite, Gypsum, Nickel-iron, Plagioclase, Kamacite, Schreibersite , Troilite
Cristobalite
Formula: SiO2
Description: An interstitial phase
Reference: Enstatite; Calcite, Clinoenstatite, Cristobalite, Daubréelite, Goethite, Gypsum, Nickel-iron, Plagioclase, Kamacite, Schreibersite , Troilite; van Niekerk, D., Keil, K. & Humayan, M. (2014) Petrogenesis of anomalous Queen Alexandra Range enstatite meteorites and their relation to enstatite chondrites, primitive enstatite achondrites, and aubrites: Meteoritics & Planetary Science 49 (3): 295-312. (March 2014)
Daubréelite
Formula: Fe2+Cr3+2S4
Description: Usually exolved from Troilite
Reference: Weisberg, M. K., Prinz, M. & Nehru, C. E. (1997) QUE 94204 - an EH-chondritic melt rock (Conference Paper): Lunar and Planetary Science Conference XXVIII, pdf#1358: 525-526. (March 1997); Enstatite; Calcite, Clinoenstatite, Cristobalite, Daubréelite, Goethite, Gypsum, Nickel-iron, Plagioclase, Kamacite, Schreibersite , Troilite; van Niekerk, D., Keil, K. & Humayan, M. (2014) Petrogenesis of anomalous Queen Alexandra Range enstatite meteorites and their relation to enstatite chondrites, primitive enstatite achondrites, and aubrites: Meteoritics & Planetary Science 49 (3): 295-312. (March 2014)
Enstatite
Formula: Mg2Si2O6
Description: Coarse-grained and dominant orthoenstatite is accompanied by clinoenstatie-bearing lamellae
Reference: Weisberg, M. K., Prinz, M. & Nehru, C. E. (1997) QUE 94204 - an EH-chondritic melt rock (Conference Paper): Lunar and Planetary Science Conference XXVIII, pdf#1358: 525-526. (March 1997); Enstatite; Calcite, Clinoenstatite, Cristobalite, Daubréelite, Goethite, Gypsum, Nickel-iron, Plagioclase, Kamacite, Schreibersite , Troilite; van Niekerk, D., Keil, K. & Humayan, M. (2014) Petrogenesis of anomalous Queen Alexandra Range enstatite meteorites and their relation to enstatite chondrites, primitive enstatite achondrites, and aubrites: Meteoritics & Planetary Science 49 (3): 295-312. (March 2014)
'Glass'
Description: Found as Al-Alkali-silica glass inclusions within Enstatite
Reference: van Niekerk, D., Keil, K. & Humayan, M. (2014) Petrogenesis of anomalous Queen Alexandra Range enstatite meteorites and their relation to enstatite chondrites, primitive enstatite achondrites, and aubrites: Meteoritics & Planetary Science 49 (3): 295-312. (March 2014)
Goethite
Formula: α-Fe3+O(OH)
Description: Terrestrial weathering product
Reference: Enstatite; Calcite, Clinoenstatite, Cristobalite, Daubréelite, Goethite, Gypsum, Nickel-iron, Plagioclase, Kamacite, Schreibersite , Troilite
Graphite
Formula: C
Description: Graphite blades found in some Fe-Ni grains
Reference: Score, R. & Lindstrom, M. [eds](1996) Petrographic Descriptions: Antarctic Meteorite Newsletter 19 (1). (Feb 1996); Weisberg, M. K., Prinz, M. & Nehru, C. E. (1997) QUE 94204 - an EH-chondritic melt rock (Conference Paper): Lunar and Planetary Science Conference XXVIII, pdf#1358: 525-526. (March 1997)
Gypsum
Formula: CaSO4 · 2H2O
Description: Terrestrial weathering product
Reference: Enstatite; Calcite, Clinoenstatite, Cristobalite, Daubréelite, Goethite, Gypsum, Nickel-iron, Plagioclase, Kamacite, Schreibersite , Troilite
Iron
Formula: Fe
Reference: Enstatite; Calcite, Clinoenstatite, Cristobalite, Daubréelite, Goethite, Gypsum, Nickel-iron, Plagioclase, Kamacite, Schreibersite , Troilite; van Niekerk, D., Keil, K. & Humayan, M. (2014) Petrogenesis of anomalous Queen Alexandra Range enstatite meteorites and their relation to enstatite chondrites, primitive enstatite achondrites, and aubrites: Meteoritics & Planetary Science 49 (3): 295-312. (March 2014)
Iron var. Kamacite
Formula: (Fe,Ni)
Reference: Enstatite; Calcite, Clinoenstatite, Cristobalite, Daubréelite, Goethite, Gypsum, Nickel-iron, Plagioclase, Kamacite, Schreibersite , Troilite; van Niekerk, D., Keil, K. & Humayan, M. (2014) Petrogenesis of anomalous Queen Alexandra Range enstatite meteorites and their relation to enstatite chondrites, primitive enstatite achondrites, and aubrites: Meteoritics & Planetary Science 49 (3): 295-312. (March 2014)
'Limonite'
Reference: Score, R. & Lindstrom, M. [eds](1996) Petrographic Descriptions: Antarctic Meteorite Newsletter 19 (1). (Feb 1996); Weisberg, M. K., Prinz, M. & Nehru, C. E. (1997) QUE 94204 - an EH-chondritic melt rock (Conference Paper): Lunar and Planetary Science Conference XXVIII, pdf#1358: 525-526. (March 1997)
Millerite
Formula: NiS
Reference: Weisberg, M. K., Prinz, M. & Nehru, C. E. (1997) QUE 94204 - an EH-chondritic melt rock (Conference Paper): Lunar and Planetary Science Conference XXVIII, pdf#1358: 525-526. (March 1997)
'Nickel-iron'
Description: Nickel-iron contains 2.4-2.9% Si (Score & Lindstrom,1996); The Nickel-iron includes both kamacite and Ni-rich phase [Ni ~17%])(van Niekerk, et al., 2014)
Reference: Score, R. & Lindstrom, M. [eds](1996) Petrographic Descriptions: Antarctic Meteorite Newsletter 19 (1). (Feb 1996); Weisberg, M. K., Prinz, M. & Nehru, C. E. (1997) QUE 94204 - an EH-chondritic melt rock (Conference Paper): Lunar and Planetary Science Conference XXVIII, pdf#1358: 525-526. (March 1997); Enstatite; Calcite, Clinoenstatite, Cristobalite, Daubréelite, Goethite, Gypsum, Nickel-iron, Plagioclase, Kamacite, Schreibersite , Troilite; van Niekerk, D., Keil, K. & Humayan, M. (2014) Petrogenesis of anomalous Queen Alexandra Range enstatite meteorites and their relation to enstatite chondrites, primitive enstatite achondrites, and aubrites: Meteoritics & Planetary Science 49 (3): 295-312. (March 2014)
Niningerite
Formula: (Mg,Fe2+,Mn2+)S
Description: Traces of Niningerite are reported by van Niekerk et al., (2014). Weisberg et al., (1997) also report a 'Niningerite/Alabandite' phase.
Reference: van Niekerk, D., Keil, K. & Humayan, M. (2014) Petrogenesis of anomalous Queen Alexandra Range enstatite meteorites and their relation to enstatite chondrites, primitive enstatite achondrites, and aubrites: Meteoritics & Planetary Science 49 (3): 295-312. (March 2014)
Oldhamite
Formula: (Ca,Mg)S
Reference: Weisberg, M. K., Prinz, M. & Nehru, C. E. (1997) QUE 94204 - an EH-chondritic melt rock (Conference Paper): Lunar and Planetary Science Conference XXVIII, pdf#1358: 525-526. (March 1997)
Perryite
Formula: (Ni,Fe)5(Si,P)2
Description: Small perryite grains in Metal
Reference: Weisberg, M. K., Prinz, M. & Nehru, C. E. (1997) QUE 94204 - an EH-chondritic melt rock (Conference Paper): Lunar and Planetary Science Conference XXVIII, pdf#1358: 525-526. (March 1997)
'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
Description: Interstitial Plagioclase is variable, but Oligoclase is its most prevalent form.
Reference: Score, R. & Lindstrom, M. [eds](1996) Petrographic Descriptions: Antarctic Meteorite Newsletter 19 (1). (Feb 1996); Weisberg, M. K., Prinz, M. & Nehru, C. E. (1997) QUE 94204 - an EH-chondritic melt rock (Conference Paper): Lunar and Planetary Science Conference XXVIII, pdf#1358: 525-526. (March 1997); Enstatite; Calcite, Clinoenstatite, Cristobalite, Daubréelite, Goethite, Gypsum, Nickel-iron, Plagioclase, Kamacite, Schreibersite , Troilite; van Niekerk, D., Keil, K. & Humayan, M. (2014) Petrogenesis of anomalous Queen Alexandra Range enstatite meteorites and their relation to enstatite chondrites, primitive enstatite achondrites, and aubrites: Meteoritics & Planetary Science 49 (3): 295-312. (March 2014)
'Pyroxene Group'
Formula: ADSi2O6
Reference: Score, R. & Lindstrom, M. [eds](1996) Petrographic Descriptions: Antarctic Meteorite Newsletter 19 (1). (Feb 1996)
Schreibersite
Formula: (Fe,Ni)3P
Description: sparse and in small grains
Reference: Weisberg, M. K., Prinz, M. & Nehru, C. E. (1997) QUE 94204 - an EH-chondritic melt rock (Conference Paper): Lunar and Planetary Science Conference XXVIII, pdf#1358: 525-526. (March 1997); Enstatite; Calcite, Clinoenstatite, Cristobalite, Daubréelite, Goethite, Gypsum, Nickel-iron, Plagioclase, Kamacite, Schreibersite , Troilite; van Niekerk, D., Keil, K. & Humayan, M. (2014) Petrogenesis of anomalous Queen Alexandra Range enstatite meteorites and their relation to enstatite chondrites, primitive enstatite achondrites, and aubrites: Meteoritics & Planetary Science 49 (3): 295-312. (March 2014)
Troilite
Formula: FeS
Reference: Weisberg, M. K., Prinz, M. & Nehru, C. E. (1997) QUE 94204 - an EH-chondritic melt rock (Conference Paper): Lunar and Planetary Science Conference XXVIII, pdf#1358: 525-526. (March 1997); Enstatite; Calcite, Clinoenstatite, Cristobalite, Daubréelite, Goethite, Gypsum, Nickel-iron, Plagioclase, Kamacite, Schreibersite , Troilite; van Niekerk, D., Keil, K. & Humayan, M. (2014) Petrogenesis of anomalous Queen Alexandra Range enstatite meteorites and their relation to enstatite chondrites, primitive enstatite achondrites, and aubrites: Meteoritics & Planetary Science 49 (3): 295-312. (March 2014)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Graphite1.CB.05aC
Iron1.AE.05Fe
var. Kamacite1.AE.05(Fe,Ni)
Perryite1.BB.10(Ni,Fe)5(Si,P)2
Schreibersite1.BD.05(Fe,Ni)3P
Group 2 - Sulphides and Sulfosalts
Daubréelite2.DA.05Fe2+Cr3+2S4
Millerite2.CC.20NiS
Niningerite2.CD.10(Mg,Fe2+,Mn2+)S
Oldhamite2.CD.10(Ca,Mg)S
Troilite2.CC.10FeS
Group 4 - Oxides and Hydroxides
Cristobalite4.DA.15SiO2
Goethite4.00.α-Fe3+O(OH)
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Gypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
var. Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Clinoenstatite9.DA.10MgSiO3
Enstatite9.DA.05Mg2Si2O6
Unclassified Minerals, Rocks, etc.
'Glass'-
'Limonite'-
'Nickel-iron'-
'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
'Pyroxene Group'-ADSi2O6

List of minerals for each chemical element

HHydrogen
H Goethiteα-Fe3+O(OH)
H GypsumCaSO4 · 2H2O
CCarbon
C GraphiteC
C CalciteCaCO3
OOxygen
O Pyroxene GroupADSi2O6
O Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
O EnstatiteMg2Si2O6
O CalciteCaCO3
O ClinoenstatiteMgSiO3
O CristobaliteSiO2
O Goethiteα-Fe3+O(OH)
O GypsumCaSO4 · 2H2O
O Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
O AlbiteNa(AlSi3O8)
NaSodium
Na Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Na Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Na AlbiteNa(AlSi3O8)
MgMagnesium
Mg EnstatiteMg2Si2O6
Mg Oldhamite(Ca,Mg)S
Mg ClinoenstatiteMgSiO3
Mg Niningerite(Mg,Fe2+,Mn2+)S
AlAluminium
Al Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Al Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Al AlbiteNa(AlSi3O8)
SiSilicon
Si Pyroxene GroupADSi2O6
Si Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Si EnstatiteMg2Si2O6
Si Perryite(Ni,Fe)5(Si,P)2
Si ClinoenstatiteMgSiO3
Si CristobaliteSiO2
Si Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Si AlbiteNa(AlSi3O8)
PPhosphorus
P Perryite(Ni,Fe)5(Si,P)2
P Schreibersite(Fe,Ni)3P
SSulfur
S DaubréeliteFe2+Cr23+S4
S MilleriteNiS
S Oldhamite(Ca,Mg)S
S TroiliteFeS
S GypsumCaSO4 · 2H2O
S Niningerite(Mg,Fe2+,Mn2+)S
CaCalcium
Ca Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Ca Oldhamite(Ca,Mg)S
Ca CalciteCaCO3
Ca GypsumCaSO4 · 2H2O
Ca Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
CrChromium
Cr DaubréeliteFe2+Cr23+S4
MnManganese
Mn Niningerite(Mg,Fe2+,Mn2+)S
FeIron
Fe DaubréeliteFe2+Cr23+S4
Fe Perryite(Ni,Fe)5(Si,P)2
Fe Schreibersite(Fe,Ni)3P
Fe TroiliteFeS
Fe Goethiteα-Fe3+O(OH)
Fe Iron var. Kamacite(Fe,Ni)
Fe Niningerite(Mg,Fe2+,Mn2+)S
Fe IronFe
NiNickel
Ni MilleriteNiS
Ni Perryite(Ni,Fe)5(Si,P)2
Ni Schreibersite(Fe,Ni)3P
Ni Iron var. Kamacite(Fe,Ni)

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Score, R. & Lindstrom, M. [eds](1996) Petrographic Descriptions: Antarctic Meteorite Newsletter 19 (1). (Feb 1996)
Weisberg, M. K., Prinz, M. & Nehru, C. E. (1997) QUE 94204 - an EH-chondritic melt rock (Conference Paper): Lunar and Planetary Science Conference XXVIII, pdf#1358: 525-526. (March 1997)
Izawa, M. R. M., Flemming, R. L., Banerjee, N. R. & Matveev, S. (2011) QUE 94204: A primitive enstatite achondrite produced by the partial melting of an E chondrite-like protolith. Meteoritics & Planetary Science 46 (11): 1742–1753. (Nov 2011)
van Niekerk, D., Keil, K. & Humayan, M. (2014) Petrogenesis of anomalous Queen Alexandra Range enstatite meteorites and their relation to enstatite chondrites, primitive enstatite achondrites, and aubrites: Meteoritics & Planetary Science 49 (3): 295-312. (March 2014)

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Other Regions, Features and Areas containing this locality

Antarctic MeteoritesGroup of Meteorite Fall Locations
Antarctic PlateTectonic Plate

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