Queen Alexandra Range 94204 meteorite, Queen Alexandra Range, Victoria Land, Eastern Antarctica, Antarcticai
Regional Level Types | |
---|---|
Queen Alexandra Range 94204 meteorite | Meteorite Fall Location |
Queen Alexandra Range | Mountain Range |
Victoria Land | Region |
Eastern Antarctica | Region |
Antarctica | Continent |
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Latitude & Longitude (WGS84):
84° South , 168° East
Latitude & Longitude (decimal):
Locality type:
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 Severe weathering complicates the issue as metal, most oldhamite, and other reduced minerals have been replaced by terrestrial weathering products (e.g., calcite, goethite…).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 ElementsMineral 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 DiagramDetailed 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 | |||
---|---|---|---|
ⓘ | Graphite | 1.CB.05a | C |
ⓘ | Iron | 1.AE.05 | Fe |
ⓘ | var. Kamacite | 1.AE.05 | (Fe,Ni) |
ⓘ | Perryite | 1.BB.10 | (Ni,Fe)5(Si,P)2 |
ⓘ | Schreibersite | 1.BD.05 | (Fe,Ni)3P |
Group 2 - Sulphides and Sulfosalts | |||
ⓘ | Daubréelite | 2.DA.05 | Fe2+Cr3+2S4 |
ⓘ | Millerite | 2.CC.20 | NiS |
ⓘ | Niningerite | 2.CD.10 | (Mg,Fe2+,Mn2+)S |
ⓘ | Oldhamite | 2.CD.10 | (Ca,Mg)S |
ⓘ | Troilite | 2.CC.10 | FeS |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Cristobalite | 4.DA.15 | SiO2 |
ⓘ | Goethite | 4.00. | α-Fe3+O(OH) |
Group 5 - Nitrates and Carbonates | |||
ⓘ | Calcite | 5.AB.05 | CaCO3 |
Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
ⓘ | Gypsum | 7.CD.40 | CaSO4 · 2H2O |
Group 9 - Silicates | |||
ⓘ | Albite | 9.FA.35 | Na(AlSi3O8) |
ⓘ | var. Oligoclase | 9.FA.35 | (Na,Ca)[Al(Si,Al)Si2O8] |
ⓘ | Clinoenstatite | 9.DA.10 | MgSiO3 |
ⓘ | Enstatite | 9.DA.05 | Mg2Si2O6 |
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
H | Hydrogen | |
---|---|---|
H | ⓘ Goethite | α-Fe3+O(OH) |
H | ⓘ Gypsum | CaSO4 · 2H2O |
C | Carbon | |
C | ⓘ Graphite | C |
C | ⓘ Calcite | CaCO3 |
O | Oxygen | |
O | ⓘ Pyroxene Group | ADSi2O6 |
O | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
O | ⓘ Enstatite | Mg2Si2O6 |
O | ⓘ Calcite | CaCO3 |
O | ⓘ Clinoenstatite | MgSiO3 |
O | ⓘ Cristobalite | SiO2 |
O | ⓘ Goethite | α-Fe3+O(OH) |
O | ⓘ Gypsum | CaSO4 · 2H2O |
O | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
O | ⓘ Albite | Na(AlSi3O8) |
Na | Sodium | |
Na | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Na | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
Na | ⓘ Albite | Na(AlSi3O8) |
Mg | Magnesium | |
Mg | ⓘ Enstatite | Mg2Si2O6 |
Mg | ⓘ Oldhamite | (Ca,Mg)S |
Mg | ⓘ Clinoenstatite | MgSiO3 |
Mg | ⓘ Niningerite | (Mg,Fe2+,Mn2+)S |
Al | Aluminium | |
Al | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Al | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
Al | ⓘ Albite | Na(AlSi3O8) |
Si | Silicon | |
Si | ⓘ Pyroxene Group | ADSi2O6 |
Si | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Si | ⓘ Enstatite | Mg2Si2O6 |
Si | ⓘ Perryite | (Ni,Fe)5(Si,P)2 |
Si | ⓘ Clinoenstatite | MgSiO3 |
Si | ⓘ Cristobalite | SiO2 |
Si | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
Si | ⓘ Albite | Na(AlSi3O8) |
P | Phosphorus | |
P | ⓘ Perryite | (Ni,Fe)5(Si,P)2 |
P | ⓘ Schreibersite | (Fe,Ni)3P |
S | Sulfur | |
S | ⓘ Daubréelite | Fe2+Cr23+S4 |
S | ⓘ Millerite | NiS |
S | ⓘ Oldhamite | (Ca,Mg)S |
S | ⓘ Troilite | FeS |
S | ⓘ Gypsum | CaSO4 · 2H2O |
S | ⓘ Niningerite | (Mg,Fe2+,Mn2+)S |
Ca | Calcium | |
Ca | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Ca | ⓘ Oldhamite | (Ca,Mg)S |
Ca | ⓘ Calcite | CaCO3 |
Ca | ⓘ Gypsum | CaSO4 · 2H2O |
Ca | ⓘ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
Cr | Chromium | |
Cr | ⓘ Daubréelite | Fe2+Cr23+S4 |
Mn | Manganese | |
Mn | ⓘ Niningerite | (Mg,Fe2+,Mn2+)S |
Fe | Iron | |
Fe | ⓘ Daubréelite | Fe2+Cr23+S4 |
Fe | ⓘ Perryite | (Ni,Fe)5(Si,P)2 |
Fe | ⓘ Schreibersite | (Fe,Ni)3P |
Fe | ⓘ Troilite | FeS |
Fe | ⓘ Goethite | α-Fe3+O(OH) |
Fe | ⓘ Iron var. Kamacite | (Fe,Ni) |
Fe | ⓘ Niningerite | (Mg,Fe2+,Mn2+)S |
Fe | ⓘ Iron | Fe |
Ni | Nickel | |
Ni | ⓘ Millerite | NiS |
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)
External Links
http://www.lpi.usra.edu/meteor/metbull.php = Meteoritical Bulletin Database
http://curator.jsc.nasa.gov/antmet/amn/amn.cfm#191
http://curator.jsc.nasa.gov/antmet/amn/amn.cfm#191
Other Regions, Features and Areas containing this locality
Antarctic MeteoritesGroup of Meteorite Fall Locations
Antarctic PlateTectonic Plate
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