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Elephant Moraine 83309 meteorite (EET 83309), Elephant Moraine, Victoria Land, Eastern Antarctica, Antarcticai
Regional Level Types
Elephant Moraine 83309 meteorite (EET 83309)Meteorite Fall Location
Elephant Moraine- not defined -
Victoria LandRegion
Eastern AntarcticaRegion
AntarcticaContinent

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Key
Latitude & Longitude (WGS84):
76° 18' 51'' South , 157° 13' 10'' East
Latitude & Longitude (decimal):
Köppen climate type:


Ureilite, polymict (ureil-pm)
Find, 1983; 60.8 g, weathered

Elephant Moraine 83309 (EET 83309) is a small, very weathered meteoritic stone which had retained a small portion of its fusion crust when recovered. The interior — quite brecciated — is compositionally dominated by olivine clasts (≤3mm), lesser amounts of pigeonite, a few plagioclase clasts, small graphite-rich regions, and the distinctive ureilite oxygen isotope signatures. Iron oxide veins and stains have largely replaced most of the metal and sulfides which were once present. But EET 83309 is no ordinary ureilite as it was the first of the 'polymict ureilites' to be recognized. In addition to the olivine, graphite, and pigeonite found in almost all ureilites, the polymict ureilites are characterized by a multitude of clasts and inclusions which contain additional pyroxenes (e.g., augite, enstatite, orthopyroxene), plagioclase (missing from most ureilites), unusual nitrogen isotopes, and other inclusions. The entire suite of minerals found in the polymict ureilites is not easily characterized as they appear to be derived from diverse sources (a putative ureilite parent body (UPB), several ureilite parent bodies?, and elsewhere). Polymict ureilites have generated intense interest, however, because it is thought that their mineralogical diversity may provide vital clues as to why the the ureilites possess both (1) 'cumulate' mineral suites believed to require moderately large parent bodies and (2) isotopic signatures usually interpreted as characteristic of small bodies from within the ancient solar nebula.

Polymict ureilites represent slightly more than 5% of the ureilite population. While the theoretical implications of the polymict subgroup remain a work in progress, their mineralogical diversity can be appreciated 'as is.' Two other polymict ureilites with Mindat sites are the North Haig, Australia find (1961) and the Dar al Gani 319, Libya find (1997).

Regions containing this locality

Antarctic PlateTectonic Plate
Antarctic MeteoritesGroup of Meteorite Fall Locations

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


16 valid minerals.

Meteorite/Rock Types Recorded

Note: this is a very new system on mindat.org and 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)
Description: Albite (Ab89-93) in granitic clast.
Reference: Downes, H., Beard, A. D. & Howard, K. (2009) Petrology of a Granitic Clast in Polymict Ureilite EET 83309: Meteoritics & Planetary Science 44 (7, Supplement): page. A63. (Sept 2009).
Albite var: Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Description: As a large (150 x 225 μm) euhedral zoned phenocryst in granitic clast.
Reference: Downes, H., Beard, A. D. & Howard, K. (2009) Petrology of a Granitic Clast in Polymict Ureilite EET 83309: Meteoritics & Planetary Science 44 (7, Supplement): page. A63. (Sept 2009).
'Albite-Anorthite Series'
Description: Albitic plagioclase (Ab82).
Reference: Prinz, M., Weisberg, M. K., Nehru, C. E. & Delaney, J. S. (1987) EET 83309, A Polymict Ureilite: Recognition of a New Group: Abstracts of the Lunar and Planetary Science Conference XVIII: 802-803. (Mar 1987).; Guan, Y. & Crozaz, G. (2001) Microdistributions and petrogenetic implications of rare earth elements in polymict ureilites: Meteoritics & Planetary Science 36( 8): 1039-1056. (Aug 2001). ; Beard, A. D., Downes, H. & Howard, K. (2009) Hydrated Silica (Opal) in a Polymict Ureilite, EET 83309: Meteoritics & Planetary Science 44 (7, Supplement): page. A31. (Sept 2009).; Downes, H., Mittlefehldt, D.W., Hita, N.T. & Valley J.W. (2008) Evidence from polymict ureilites for a disrupted and re-accreted single parent body gardened by several distinct impactors: Geochimica et Cosmochimica Acta 72 (19): 4825 -4844. (1 Oct 2008).
Anorthite
Formula: Ca(Al2Si2O8)
Description: In clasts.
Reference: Downes, H., Mittlefehldt, D.W., Hita, N.T. & Valley J.W. (2008) Evidence from polymict ureilites for a disrupted and re-accreted single parent body gardened by several distinct impactors: Geochimica et Cosmochimica Acta 72 (19): 4825 -4844. (1 Oct 2008).
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Description: Augite is rare.
Reference: Downes, H., Mittlefehldt, D.W., Hita, N.T. & Valley J.W. (2008) Evidence from polymict ureilites for a disrupted and re-accreted single parent body gardened by several distinct impactors: Geochimica et Cosmochimica Acta 72 (19): 4825 -4844. (1 Oct 2008).
Chromite
Formula: Fe2+Cr3+2O4
Reference: Downes, H., Mittlefehldt, D.W., Hita, N.T. & Valley J.W. (2008) Evidence from polymict ureilites for a disrupted and re-accreted single parent body gardened by several distinct impactors: Geochimica et Cosmochimica Acta 72 (19): 4825 -4844. (1 Oct 2008).
Enstatite
Formula: MgSiO3
Description: In clasts.
Reference: Guan, Y. & Crozaz, G. (2001) Microdistributions and petrogenetic implications of rare earth elements in polymict ureilites: Meteoritics & Planetary Science 36( 8): 1039-1056. (Aug 2001). ; Downes, H., Mittlefehldt, D.W., Hita, N.T. & Valley J.W. (2008) Evidence from polymict ureilites for a disrupted and re-accreted single parent body gardened by several distinct impactors: Geochimica et Cosmochimica Acta 72 (19): 4825 -4844. (1 Oct 2008).
'Fayalite-Forsterite Series'
Description: Olivine compositional range [Fo62-93].
Reference: Prinz, M., Weisberg, M. K., Nehru, C. E. & Delaney, J. S. (1987) EET 83309, A Polymict Ureilite: Recognition of a New Group: Abstracts of the Lunar and Planetary Science Conference XVIII: 802-803. (Mar 1987).; Warren, P. H. & Kallemeyn, G. W. (1989) Geochemistry of polymict ureilite EET83309, and a partially-disruptive impact model for ureilite origin: Meteoritics 24 (4):233-246. (Dec 1989).; Mittlefehldt, D. W., McCoy, T. J., Goodrich, C. A. & Kracher, A. (1998). Non-chondritic meteorites from asteroidal bodies. In: Planetary Materials (Papike, J. J., Editor): Chapter 4, 195 pages. Mineralogical Society of America: Washington, DC, USA. (1998) ; Guan, Y. & Crozaz, G. (2001) Microdistributions and petrogenetic implications of rare earth elements in polymict ureilites: Meteoritics & Planetary Science 36( 8): 1039-1056. (Aug 2001). ; Downes, H., Mittlefehldt, D.W., Hita, N.T. & Valley J.W. (2008) Evidence from polymict ureilites for a disrupted and re-accreted single parent body gardened by several distinct impactors: Geochimica et Cosmochimica Acta 72 (19): 4825 -4844. (1 Oct 2008).
Forsterite
Formula: Mg2SiO4
Description: Mg-rich Olivine reaches Fo93 in places.
Reference: Mittlefehldt, D. W., McCoy, T. J., Goodrich, C. A. & Kracher, A. (1998). Non-chondritic meteorites from asteroidal bodies. In: Planetary Materials (Papike, J. J., Editor): Chapter 4, 195 pages. Mineralogical Society of America: Washington, DC, USA. (1998)
'Glass'
Description: Plagioclase normative (An61Ab35)-labradorite composition somewhat different from crystalline plagioclase.
Reference: Guan, Y. & Crozaz, G. (2001) Microdistributions and petrogenetic implications of rare earth elements in polymict ureilites: Meteoritics & Planetary Science 36( 8): 1039-1056. (Aug 2001).
Graphite
Formula: C
Reference: Beard, A. D., Downes, H. & Howard, K. (2009) Hydrated Silica (Opal) in a Polymict Ureilite, EET 83309: Meteoritics & Planetary Science 44 (7, Supplement): page. A31. (Sept 2009).
'Iddingsite'
Formula: MgO · Fe2O3 · 3SiO2·4H2O
Reference: Guan, Y. & Crozaz, G. (2001) Microdistributions and petrogenetic implications of rare earth elements in polymict ureilites: Meteoritics & Planetary Science 36( 8): 1039-1056. (Aug 2001).
Iron
Formula: Fe
Description: Some iron much too Ni-rich to be kamacite.
Reference: Beard, A. D., Downes, H. & Howard, K. (2009) Hydrated Silica (Opal) in a Polymict Ureilite, EET 83309: Meteoritics & Planetary Science 44 (7, Supplement): page. A31. (Sept 2009).
Opal
Formula: SiO2 · nH2O
Reference: Beard, A. D., Downes, H. & Howard, K. (2009) Hydrated Silica (Opal) in a Polymict Ureilite, EET 83309: Meteoritics & Planetary Science 44 (7, Supplement): page. A31. (Sept 2009).
'Orthopyroxene Subgroup'
Reference: Prinz, M., Weisberg, M. K., Nehru, C. E. & Delaney, J. S. (1987) EET 83309, A Polymict Ureilite: Recognition of a New Group: Abstracts of the Lunar and Planetary Science Conference XVIII: 802-803. (Mar 1987).; Guan, Y. & Crozaz, G. (2001) Microdistributions and petrogenetic implications of rare earth elements in polymict ureilites: Meteoritics & Planetary Science 36( 8): 1039-1056. (Aug 2001).
Pentlandite
Formula: (FexNiy)Σ9S8
Reference: Herrin, J. S., Mittlefehldt, D. W., Downes, H. & Humayun, M. (2007) Diverse Metals and Sulfides in Polymict Ureilites EET 83309 and EET 87720: Lunar and Planetary Science XXXVIII. LPI Contribution No. 1338, p.2404. (March 2007).
Pigeonite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: Prinz, M., Weisberg, M. K., Nehru, C. E. & Delaney, J. S. (1987) EET 83309, A Polymict Ureilite: Recognition of a New Group: Abstracts of the Lunar and Planetary Science Conference XVIII: 802-803. (Mar 1987).; Warren, P. H. & Kallemeyn, G. W. (1989) Geochemistry of polymict ureilite EET83309, and a partially-disruptive impact model for ureilite origin: Meteoritics 24 (4):233-246. (Dec 1989).; Mittlefehldt, D. W., McCoy, T. J., Goodrich, C. A. & Kracher, A. (1998). Non-chondritic meteorites from asteroidal bodies. In: Planetary Materials (Papike, J. J., Editor): Chapter 4, 195 pages. Mineralogical Society of America: Washington, DC, USA. (1998) ; Downes, H., Mittlefehldt, D.W., Hita, N.T. & Valley J.W. (2008) Evidence from polymict ureilites for a disrupted and re-accreted single parent body gardened by several distinct impactors: Geochimica et Cosmochimica Acta 72 (19): 4825 -4844. (1 Oct 2008).
'Pyroxene Group'
Description: Pyroxenes include (at least) Ca-poor enstatite and pigeonite plus Ca-rich pyroxenes.
Reference: Guan, Y. & Crozaz, G. (2001) Microdistributions and petrogenetic implications of rare earth elements in polymict ureilites: Meteoritics & Planetary Science 36( 8): 1039-1056. (Aug 2001). ; Beard, A. D., Downes, H. & Howard, K. (2009) Hydrated Silica (Opal) in a Polymict Ureilite, EET 83309: Meteoritics & Planetary Science 44 (7, Supplement): page. A31. (Sept 2009).; Downes, H., Mittlefehldt, D.W., Hita, N.T. & Valley J.W. (2008) Evidence from polymict ureilites for a disrupted and re-accreted single parent body gardened by several distinct impactors: Geochimica et Cosmochimica Acta 72 (19): 4825 -4844. (1 Oct 2008).
Pyrrhotite
Formula: Fe7S8
Reference: Downes, H., Mittlefehldt, D.W., Hita, N.T. & Valley J.W. (2008) Evidence from polymict ureilites for a disrupted and re-accreted single parent body gardened by several distinct impactors: Geochimica et Cosmochimica Acta 72 (19): 4825 -4844. (1 Oct 2008).
Quartz
Formula: SiO2
Description: In granitic clast.
Reference: Downes, H., Beard, A. D. & Howard, K. (2009) Petrology of a Granitic Clast in Polymict Ureilite EET 83309: Meteoritics & Planetary Science 44 (7, Supplement): page. A63. (Sept 2009).
Schreibersite
Formula: (Fe,Ni)3P
Reference: Beard, A. D., Downes, H. & Howard, K. (2009) Hydrated Silica (Opal) in a Polymict Ureilite, EET 83309: Meteoritics & Planetary Science 44 (7, Supplement): page. A31. (Sept 2009).
Suessite
Formula: (Fe,Ni)3Si
Reference: Prinz, M., Weisberg, M. K., Nehru, C. E. & Delaney, J. S. (1987) EET 83309, A Polymict Ureilite: Recognition of a New Group: Abstracts of the Lunar and Planetary Science Conference XVIII: 802-803. (Mar 1987).; Herrin, J. S., Mittlefehldt, D. W., Downes, H. & Humayun, M. (2007) Diverse Metals and Sulfides in Polymict Ureilites EET 83309 and EET 87720: Lunar and Planetary Science XXXVIII. LPI Contribution No. 1338, p.2404. (March 2007).; Beard, A. D., Downes, H. & Howard, K. (2009) Hydrated Silica (Opal) in a Polymict Ureilite, EET 83309: Meteoritics & Planetary Science 44 (7, Supplement): page. A31. (Sept 2009).
Troilite
Formula: FeS
Reference: Prinz, M., Weisberg, M. K., Nehru, C. E. & Delaney, J. S. (1987) EET 83309, A Polymict Ureilite: Recognition of a New Group: Abstracts of the Lunar and Planetary Science Conference XVIII: 802-803. (Mar 1987).; Herrin, J. S., Mittlefehldt, D. W., Downes, H. & Humayun, M. (2007) Diverse Metals and Sulfides in Polymict Ureilites EET 83309 and EET 87720: Lunar and Planetary Science XXXVIII. LPI Contribution No. 1338, p.2404. (March 2007).; Beard, A. D., Downes, H. & Howard, K. (2009) Hydrated Silica (Opal) in a Polymict Ureilite, EET 83309: Meteoritics & Planetary Science 44 (7, Supplement): page. A31. (Sept 2009).

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Graphite1.CB.05aC
Iron1.AE.05Fe
Schreibersite1.BD.05(Fe,Ni)3P
Suessite1.BB.05(Fe,Ni)3Si
Group 2 - Sulphides and Sulfosalts
Pentlandite2.BB.15(FexNiy)Σ9S8
Pyrrhotite2.CC.10Fe7S8
Troilite2.CC.10FeS
Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Opal4.DA.10SiO2 · nH2O
Quartz4.DA.05SiO2
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
var: Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Anorthite9.FA.35Ca(Al2Si2O8)
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Enstatite9.DA.05MgSiO3
Forsterite9.AC.05Mg2SiO4
Pigeonite9.DA.10(CaxMgyFez)(Mgy1Fez1)Si2O6
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Fayalite-Forsterite Series'-
'Glass'-
'Iddingsite'-MgO · Fe2O3 · 3SiO2·4H2O
'Orthopyroxene Subgroup'-
'Pyroxene Group'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Schreibersite1.1.21.2(Fe,Ni)3P
Suessite1.1.23.1(Fe,Ni)3Si
Semi-metals and non-metals
Graphite1.3.6.2C
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 9:8
Pentlandite2.7.1.1(FexNiy)Σ9S8
AmXp, with m:p = 1:1
Pyrrhotite2.8.10.1Fe7S8
Troilite2.8.9.1FeS
Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Forsterite51.3.1.2Mg2SiO4
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Augite65.1.3a.3(CaxMgyFez)(Mgy1Fez1)Si2O6
Enstatite65.1.2.1MgSiO3
Pigeonite65.1.1.4(CaxMgyFez)(Mgy1Fez1)Si2O6
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
var: Oligoclase-(Na,Ca)[Al(Si,Al)Si2O8]
'Albite-Anorthite Series'-
Anorthite-Ca(Al2Si2O8)
'Fayalite-Forsterite Series'-
'Glass'-
'Iddingsite'-MgO · Fe2O3 · 3SiO2·4H2O
Iron-Fe
'Orthopyroxene Subgroup'-
'Pyroxene Group'-

List of minerals for each chemical element

HHydrogen
H IddingsiteMgO · Fe2O3 · 3SiO2·4H2O
H OpalSiO2 · nH2O
CCarbon
C GraphiteC
OOxygen
O Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
O ForsteriteMg2SiO4
O EnstatiteMgSiO3
O IddingsiteMgO · Fe2O3 · 3SiO2·4H2O
O OpalSiO2 · nH2O
O QuartzSiO2
O AlbiteNa(AlSi3O8)
O Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
O AnorthiteCa(Al2Si2O8)
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O ChromiteFe2+Cr23+O4
NaSodium
Na AlbiteNa(AlSi3O8)
Na Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
MgMagnesium
Mg Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg ForsteriteMg2SiO4
Mg EnstatiteMgSiO3
Mg IddingsiteMgO · Fe2O3 · 3SiO2·4H2O
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
AlAluminium
Al AlbiteNa(AlSi3O8)
Al Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Al AnorthiteCa(Al2Si2O8)
SiSilicon
Si Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si Suessite(Fe,Ni)3Si
Si ForsteriteMg2SiO4
Si EnstatiteMgSiO3
Si IddingsiteMgO · Fe2O3 · 3SiO2·4H2O
Si OpalSiO2 · nH2O
Si QuartzSiO2
Si AlbiteNa(AlSi3O8)
Si Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Si AnorthiteCa(Al2Si2O8)
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
PPhosphorus
P Schreibersite(Fe,Ni)3P
SSulfur
S TroiliteFeS
S Pentlandite(FexNiy)Σ9S8
S PyrrhotiteFe7S8
CaCalcium
Ca Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Ca AnorthiteCa(Al2Si2O8)
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
CrChromium
Cr ChromiteFe2+Cr23+O4
FeIron
Fe Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe Suessite(Fe,Ni)3Si
Fe TroiliteFeS
Fe IddingsiteMgO · Fe2O3 · 3SiO2·4H2O
Fe Pentlandite(FexNiy)Σ9S8
Fe Schreibersite(Fe,Ni)3P
Fe IronFe
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe ChromiteFe2+Cr23+O4
Fe PyrrhotiteFe7S8
NiNickel
Ni Suessite(Fe,Ni)3Si
Ni Pentlandite(FexNiy)Σ9S8
Ni Schreibersite(Fe,Ni)3P

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Prinz, M., Weisberg, M. K., Nehru, C. E. & Delaney, J. S. (1987) EET 83309, A Polymict Ureilite: Recognition of a New Group: Abstracts of the Lunar and Planetary Science Conference XVIII: 802-803. (Mar 1987).
Grady, M. M. & Carl T. Pillinger, C. T. (1987) Unusual nitrogen isotope composition of polymict ureilites: Meteoritics 22(4): 394-395. (Dec 1987).
Warren, P. H. & Kallemeyn, G. W. (1989) Geochemistry of polymict ureilite EET83309, and a partially-disruptive impact model for ureilite origin: Meteoritics 24 (4):233-246. (Dec 1989).
Ott, U., Löhr, H. P. & Begemann, F. (1990) EET 83309: A ureilite with solar noble gases. Meteoritics 25(4): p. 396. (Dec 1990).
Mittlefehldt, D. W., McCoy, T. J., Goodrich, C. A. & Kracher, A. (1998). Non-chondritic meteorites from asteroidal bodies. In: Planetary Materials (Papike, J. J., Editor): Chapter 4, 195 pages. Mineralogical Society of America: Washington, DC, USA. (1998)
Guan, Y. & Crozaz, G. (2001) Microdistributions and petrogenetic implications of rare earth elements in polymict ureilites: Meteoritics & Planetary Science 36( 8): 1039-1056. (Aug 2001).
Herrin, J. S., Mittlefehldt, D. W., Downes, H. & Humayun, M. (2007) Diverse Metals and Sulfides in Polymict Ureilites EET 83309 and EET 87720: Lunar and Planetary Science XXXVIII. LPI Contribution No. 1338, p.2404. (March 2007).
Downes, H., Mittlefehldt, D.W., Hita, N.T. & Valley J.W. (2008) Evidence from polymict ureilites for a disrupted and re-accreted single parent body gardened by several distinct impactors: Geochimica et Cosmochimica Acta 72 (19): 4825 -4844. (1 Oct 2008).
Beard, A. D., Downes, H. & Howard, K. (2009) Hydrated Silica (Opal) in a Polymict Ureilite, EET 83309: Meteoritics & Planetary Science 44 (7, Supplement): page. A31. (Sept 2009).
Downes, H., Beard, A. D. & Howard, K. (2009) Petrology of a Granitic Clast in Polymict Ureilite EET 83309: Meteoritics & Planetary Science 44 (7, Supplement): page A63. (Sept 2009).
Grady, M. M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.

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