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Yamato 82050 meteorite (Y-82050), Queen Fabiola Mts (Yamato Mts), Queen Maud Land, Eastern Antarctica, Antarcticai
Regional Level Types
Yamato 82050 meteorite (Y-82050)Meteorite Fall Location
Queen Fabiola Mts (Yamato Mts)Mountain Range
Queen Maud Land- not defined -
Eastern AntarcticaRegion
AntarcticaContinent

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Key
Latitude & Longitude (WGS84):
71° 30' South , 35° 40' East
Latitude & Longitude (decimal):
Meteoritical Society Class:
Köppen climate type:


Carbonaceous Chondrite (CO3.2)
Find, 1981; 1.907 g

Yamato 82050 (Y-82050) is a moderately large meteorite recovered from Antarctica. As a CO3 (Ornans-like) carbonaceous chondrite, it is characterized by its near solar bulk Mg/Si ratios, distinctive O-isotopes plus small chondrules and refractory inclusions which occupy ~50 vol% of the meteorite. Its matrix is presumably comprised of low-Ca pyroxene grains,olivine, phyllosilicates, and various unequilibrated silicate grains. However, specific information about the matrix has not been published in widely available English-language publications. What have been published are some detailed analyses of Y-82050's spinel-rich CAI inclusions. These inclusions contain telltale signs of alteration from their original complement of high-T condensates (e.g., melilite, anorthite, …) into nepheline, hercynite, and a number of other phases. Zoned olivine crystals and diopside-rich inclusion rims are perhaps the best indicators of the mild metamorphism which altered what still remains a remarkably primitive meteorite.


Y-82050 is the 2nd most massive of the eleven CO3.2 carbonaceous chondrites listed at The Meteoritical Society's 'Meteoritical Bulletin Database' as of mid-July 2015. The list includes 8 Northwest Africa meteorites (possibly representing a very small number of actual falls). Thus Y-82050 qualifies as a truly rare meteorite specimen.

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


11 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:

Anorthite
Formula: Ca(Al2Si2O8)
Reference: Kojima, T., Yada, S. & Tomeoka, K. (1995) Ca-Al-rich inclusions in three Antarctic CO3 chondrites, Yamato-81020 Yamato-82050 and Yamato-790992: Record of low temperature alteration. Proc. NIPR Symposium. Antarct. Meteorites 8: 79-96. (May 1995).; Brearley, A. J. & Jones, R. H. (1998) Chondritic Meteorites: IN: Planetary Materials (James J. Papike, Editor), Chapter 3, 398 pages: Mineralogical Society of America: Washington, DC, USA.
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: Kojima, T., Yada, S. & Tomeoka, K. (1995) Ca-Al-rich inclusions in three Antarctic CO3 chondrites, Yamato-81020 Yamato-82050 and Yamato-790992: Record of low temperature alteration. Proc. NIPR Symposium. Antarct. Meteorites 8: 79-96. (May 1995).
Augite var: Fassaite
Formula: (Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Reference: Kojima, T., Yada, S. & Tomeoka, K. (1995) Ca-Al-rich inclusions in three Antarctic CO3 chondrites, Yamato-81020 Yamato-82050 and Yamato-790992: Record of low temperature alteration. Proc. NIPR Symposium. Antarct. Meteorites 8: 79-96. (May 1995).
Diopside
Formula: CaMgSi2O6
Reference: Kojima, T., Yada, S. & Tomeoka, K. (1995) Ca-Al-rich inclusions in three Antarctic CO3 chondrites, Yamato-81020 Yamato-82050 and Yamato-790992: Record of low temperature alteration. Proc. NIPR Symposium. Antarct. Meteorites 8: 79-96. (May 1995).; Brearley, A. J. & Jones, R. H. (1998) Chondritic Meteorites: IN: Planetary Materials (James J. Papike, Editor), Chapter 3, 398 pages: Mineralogical Society of America: Washington, DC, USA. ; Hiyagon, H. & Hashimoto, A. (1999). An Ion Microprobe Study of Oxygen Isotopes in Various Types of Inclusions in Y-82050 (CO3), ALH-77307 (CO3) and Y-86009 (CV3) Chondrites (abstract): 30th Annual Lunar and Planetary Science Conference, abstract no. 1319. (Mar 1999).
'Fayalite-Forsterite Series'
Description: Olivine zoning evident in some inclusions [Fo97-55].
Reference: Kojima, T., Yada, S. & Tomeoka, K. (1995) Ca-Al-rich inclusions in three Antarctic CO3 chondrites, Yamato-81020 Yamato-82050 and Yamato-790992: Record of low temperature alteration. Proc. NIPR Symposium. Antarct. Meteorites 8: 79-96. (May 1995).; Hiyagon, H. & Hashimoto, A. (1999). An Ion Microprobe Study of Oxygen Isotopes in Various Types of Inclusions in Y-82050 (CO3), ALH-77307 (CO3) and Y-86009 (CV3) Chondrites (abstract): 30th Annual Lunar and Planetary Science Conference, abstract no. 1319. (Mar 1999).
Hercynite
Formula: Fe2+Al2O4
Reference: Brearley, A. J. & Jones, R. H. (1998) Chondritic Meteorites: IN: Planetary Materials (James J. Papike, Editor), Chapter 3, 398 pages: Mineralogical Society of America: Washington, DC, USA. ; Hiyagon, H. & Hashimoto, A. (1999). An Ion Microprobe Study of Oxygen Isotopes in Various Types of Inclusions in Y-82050 (CO3), ALH-77307 (CO3) and Y-86009 (CV3) Chondrites (abstract): 30th Annual Lunar and Planetary Science Conference, abstract no. 1319. (Mar 1999).
Ilmenite
Formula: Fe2+TiO3
Description: Ilmenite exsolved within spinel.
Reference: Kojima, T., Yada, S. & Tomeoka, K. (1995) Ca-Al-rich inclusions in three Antarctic CO3 chondrites, Yamato-81020 Yamato-82050 and Yamato-790992: Record of low temperature alteration. Proc. NIPR Symposium. Antarct. Meteorites 8: 79-96. (May 1995).; Brearley, A. J. & Jones, R. H. (1998) Chondritic Meteorites: IN: Planetary Materials (James J. Papike, Editor), Chapter 3, 398 pages: Mineralogical Society of America: Washington, DC, USA.
'Melilite Group'
Formula: Ca2M(XSiO7)
Reference: Kojima, T., Yada, S. & Tomeoka, K. (1995) Ca-Al-rich inclusions in three Antarctic CO3 chondrites, Yamato-81020 Yamato-82050 and Yamato-790992: Record of low temperature alteration. Proc. NIPR Symposium. Antarct. Meteorites 8: 79-96. (May 1995).; Hiyagon, H. & Hashimoto, A. (1999). An Ion Microprobe Study of Oxygen Isotopes in Various Types of Inclusions in Y-82050 (CO3), ALH-77307 (CO3) and Y-86009 (CV3) Chondrites (abstract): 30th Annual Lunar and Planetary Science Conference, abstract no. 1319. (Mar 1999).
Monticellite
Formula: CaMgSiO4
Reference: Kojima, T., Yada, S. & Tomeoka, K. (1995) Ca-Al-rich inclusions in three Antarctic CO3 chondrites, Yamato-81020 Yamato-82050 and Yamato-790992: Record of low temperature alteration. Proc. NIPR Symposium. Antarct. Meteorites 8: 79-96. (May 1995).; Brearley, A. J. & Jones, R. H. (1998) Chondritic Meteorites: IN: Planetary Materials (James J. Papike, Editor), Chapter 3, 398 pages: Mineralogical Society of America: Washington, DC, USA.
Nepheline
Formula: Na3K(Al4Si4O16)
Reference: Kojima, T., Yada, S. & Tomeoka, K. (1995) Ca-Al-rich inclusions in three Antarctic CO3 chondrites, Yamato-81020 Yamato-82050 and Yamato-790992: Record of low temperature alteration. Proc. NIPR Symposium. Antarct. Meteorites 8: 79-96. (May 1995).; Brearley, A. J. & Jones, R. H. (1998) Chondritic Meteorites: IN: Planetary Materials (James J. Papike, Editor), Chapter 3, 398 pages: Mineralogical Society of America: Washington, DC, USA.
Perovskite
Formula: CaTiO3
Reference: Kojima, T., Yada, S. & Tomeoka, K. (1995) Ca-Al-rich inclusions in three Antarctic CO3 chondrites, Yamato-81020 Yamato-82050 and Yamato-790992: Record of low temperature alteration. Proc. NIPR Symposium. Antarct. Meteorites 8: 79-96. (May 1995).; Hiyagon, H. & Hashimoto, A. (1999). An Ion Microprobe Study of Oxygen Isotopes in Various Types of Inclusions in Y-82050 (CO3), ALH-77307 (CO3) and Y-86009 (CV3) Chondrites (abstract): 30th Annual Lunar and Planetary Science Conference, abstract no. 1319. (Mar 1999).
Sodalite
Formula: Na8(Al6Si6O24)Cl2
Reference: Hiyagon, H. & Hashimoto, A. (1999). An Ion Microprobe Study of Oxygen Isotopes in Various Types of Inclusions in Y-82050 (CO3), ALH-77307 (CO3) and Y-86009 (CV3) Chondrites (abstract): 30th Annual Lunar and Planetary Science Conference, abstract no. 1319. (Mar 1999).
Spinel
Formula: MgAl2O4
Reference: Kojima, T., Yada, S. & Tomeoka, K. (1995) Ca-Al-rich inclusions in three Antarctic CO3 chondrites, Yamato-81020 Yamato-82050 and Yamato-790992: Record of low temperature alteration. Proc. NIPR Symposium. Antarct. Meteorites 8: 79-96. (May 1995).; Brearley, A. J. & Jones, R. H. (1998) Chondritic Meteorites: IN: Planetary Materials (James J. Papike, Editor), Chapter 3, 398 pages: Mineralogical Society of America: Washington, DC, USA. ; Hiyagon, H. & Hashimoto, A. (1999). An Ion Microprobe Study of Oxygen Isotopes in Various Types of Inclusions in Y-82050 (CO3), ALH-77307 (CO3) and Y-86009 (CV3) Chondrites (abstract): 30th Annual Lunar and Planetary Science Conference, abstract no. 1319. (Mar 1999).
Troilite
Formula: FeS
Description: Associated with nepheline.
Reference: Kojima, T., Yada, S. & Tomeoka, K. (1995) Ca-Al-rich inclusions in three Antarctic CO3 chondrites, Yamato-81020 Yamato-82050 and Yamato-790992: Record of low temperature alteration. Proc. NIPR Symposium. Antarct. Meteorites 8: 79-96. (May 1995).; Brearley, A. J. & Jones, R. H. (1998) Chondritic Meteorites: IN: Planetary Materials (James J. Papike, Editor), Chapter 3, 398 pages: Mineralogical Society of America: Washington, DC, USA.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Troilite2.CC.10FeS
Group 4 - Oxides and Hydroxides
Hercynite4.BB.05Fe2+Al2O4
Ilmenite4.CB.05Fe2+TiO3
Perovskite4.CC.30CaTiO3
Spinel4.BB.05MgAl2O4
Group 9 - Silicates
Anorthite9.FA.35Ca(Al2Si2O8)
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
var: Fassaite9.DA.15(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Diopside9.DA.15CaMgSi2O6
Monticellite9.AC.10CaMgSiO4
Nepheline9.FA.05Na3K(Al4Si4O16)
Sodalite9.FB.10Na8(Al6Si6O24)Cl2
Unclassified Minerals, Rocks, etc.
'Fayalite-Forsterite Series'-
'Melilite Group'-Ca2M(XSiO7)

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Troilite2.8.9.1FeS
Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
Perovskite4.3.3.1CaTiO3
Group 7 - MULTIPLE OXIDES
AB2X4
Hercynite7.2.1.3Fe2+Al2O4
Spinel7.2.1.1MgAl2O4
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Monticellite51.3.2.1CaMgSiO4
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
Diopside65.1.3a.1CaMgSi2O6
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework Feldspathoids and related species
Nepheline76.2.1.2Na3K(Al4Si4O16)
Sodalite76.2.3.1Na8(Al6Si6O24)Cl2
Unclassified Minerals, Mixtures, etc.
Anorthite-Ca(Al2Si2O8)
Augite
var: Fassaite
-(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
'Fayalite-Forsterite Series'-
'Melilite Group'-Ca2M(XSiO7)

List of minerals for each chemical element

OOxygen
O AnorthiteCa(Al2Si2O8)
O DiopsideCaMgSi2O6
O Augite (var: Fassaite)(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
O IlmeniteFe2+TiO3
O Melilite GroupCa2M(XSiO7)
O NephelineNa3K(Al4Si4O16)
O PerovskiteCaTiO3
O MonticelliteCaMgSiO4
O SpinelMgAl2O4
O HercyniteFe2+Al2O4
O SodaliteNa8(Al6Si6O24)Cl2
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
NaSodium
Na Augite (var: Fassaite)(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Na NephelineNa3K(Al4Si4O16)
Na SodaliteNa8(Al6Si6O24)Cl2
MgMagnesium
Mg DiopsideCaMgSi2O6
Mg Augite (var: Fassaite)(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Mg MonticelliteCaMgSiO4
Mg SpinelMgAl2O4
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
AlAluminium
Al AnorthiteCa(Al2Si2O8)
Al Augite (var: Fassaite)(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Al NephelineNa3K(Al4Si4O16)
Al SpinelMgAl2O4
Al HercyniteFe2+Al2O4
Al SodaliteNa8(Al6Si6O24)Cl2
SiSilicon
Si AnorthiteCa(Al2Si2O8)
Si DiopsideCaMgSi2O6
Si Augite (var: Fassaite)(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Si Melilite GroupCa2M(XSiO7)
Si NephelineNa3K(Al4Si4O16)
Si MonticelliteCaMgSiO4
Si SodaliteNa8(Al6Si6O24)Cl2
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
SSulfur
S TroiliteFeS
ClChlorine
Cl SodaliteNa8(Al6Si6O24)Cl2
KPotassium
K NephelineNa3K(Al4Si4O16)
CaCalcium
Ca AnorthiteCa(Al2Si2O8)
Ca DiopsideCaMgSi2O6
Ca Augite (var: Fassaite)(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Ca Melilite GroupCa2M(XSiO7)
Ca PerovskiteCaTiO3
Ca MonticelliteCaMgSiO4
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
TiTitanium
Ti Augite (var: Fassaite)(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Ti IlmeniteFe2+TiO3
Ti PerovskiteCaTiO3
FeIron
Fe Augite (var: Fassaite)(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Fe IlmeniteFe2+TiO3
Fe TroiliteFeS
Fe HercyniteFe2+Al2O4
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Kojima, T., Yada, S. & Tomeoka, K. (1995) Ca-Al-rich inclusions in three Antarctic CO3 chondrites, Yamato-81020 Yamato-82050 and Yamato-790992: Record of low temperature alteration. Proc. NIPR Symposium. Antarct. Meteorites 8: 79-96. (May 1995).
Brearley, A. J. & Jones, R. H. (1998) Chondritic Meteorites: IN: Planetary Materials (James J. Papike, Editor), Chapter 3, 398 pages: Mineralogical Society of America: Washington, DC, USA.
Hiyagon, H. & Hashimoto, A. (1999). An Ion Microprobe Study of Oxygen Isotopes in Various Types of Inclusions in Y-82050 (CO3), ALH-77307 (CO3) and Y-86009 (CV3) Chondrites (abstract): 30th Annual Lunar and Planetary Science Conference, abstract no. 1319. (Mar 1999).
Grady, M. M., Pratesi, G. & Moggi Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.

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