Yamato 691 meteorite, Queen Fabiola Mts, Queen Maud Land, Eastern Antarctica, Antarcticai
Regional Level Types | |
---|---|
Yamato 691 meteorite | Meteorite Fall Location |
Queen Fabiola Mts | Mountain Range |
Queen Maud Land | Region |
Eastern Antarctica | Region |
Antarctica | Continent |
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Latitude & Longitude (WGS84):
71° 50' 54'' South , 36° 31' 9'' East
Latitude & Longitude (decimal):
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:
Mindat Locality ID:
228143
Long-form identifier:
mindat:1:2:228143:1
GUID (UUID V4):
472d245a-dba7-4bb3-b220-419ffb54cf93
Other/historical names associated with this locality:
Y-691
Enstatite Chondrite, high-iron [EH3; S4]
Found December 21, 1969; 715 g
Yamato-691 [Also, ‘Y-691’ or, earlier, ‘Yamato (a)’] is a moderately small, very primitive Enstatite Chondrite discovered somewhat accidentally on a Japanese expedition to Antarctica. As an Enstatite Chondrites Yamato-691 is characterized by (1) a dominant Enstatite lithology in chondrules, matrix, and inclusions, (2) accessory Fe-Ni metal and troilite, and (3) a number of minor very reduced and frequently very rare mineral phases. Relatively abundant niningerite plus perryite indicate that Y-691 belongs to the EH (high iron) chemical group of Enstatite chondrites. Sharply defined chondrules, glass, variable pyroxene, and unequilibrated constituents (e.g., the simultaneous presence of silica and olivine) further indicate that Y-691 belongs to the petrologically primitive EH3 type. EH3s are the most common type of EH chondrite and, indeed, ten EH3 chondrites [as of April 2014] are more massive than Y-691. However, Y-691 seems to contain within its small inclusions and assemblages an even richer brew of mineralogical diversity than most other members of its type. A 1987 symposium in Tokyo was dedicated to Y-691 unusual characteristics (several references below are provided below).
Among Y-691’s various chondrules and sometimes glassy inclusions are transparent silica-rich chondrules and dark silicate-containing inclusions frequently rich in refractory minerals. A few tiny pre-solar components have also been found. A new mineral, Wassonite, has been found amidst an unusual assemblage of N-containing mineral phases. Strong pre-terrestrial shock [S4] has left also its mark. While these features are not unique per se, Y-691 appears to contain a larger component of primitive components than we might expect. Yamato-691 is one more example of the fascinating complexities sometimes found in some very small meteorites.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
28 valid minerals. 1 (TL) - type locality of 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:
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
ⓘ | Iron var. Kamacite | 1.AE.05 | (Fe,Ni) |
ⓘ | 1.AE.05 | Fe | |
ⓘ | Perryite | 1.BB.10 | (Ni,Fe)5(Si,P)2 |
ⓘ | Osbornite | 1.BC.15 | TiN |
ⓘ | Schreibersite | 1.BD.05 | (Fe,Ni)3P |
ⓘ | Graphite | 1.CB.05a | C |
Group 2 - Sulphides and Sulfosalts | |||
ⓘ | Bornite | 2.BA.15 | Cu5FeS4 |
ⓘ | Covellite | 2.CA.05a | CuS |
ⓘ | Sphalerite | 2.CB.05a | ZnS |
ⓘ | Idaite | 2.CB.15a | Cu5FeS6 |
ⓘ | Wassonite (TL) | 2.CB.50 | TiS |
ⓘ | Troilite | 2.CC.10 | FeS |
ⓘ | Smythite | 2.CC.10 | (Fe,Ni)3+xS4 (x=0-0.3) |
ⓘ | Niningerite | 2.CD.10 | (Mg,Fe2+,Mn2+)S |
ⓘ | Oldhamite | 2.CD.10 | (Ca,Mg)S |
ⓘ | Daubréelite | 2.DA.05 | Fe2+Cr3+2S4 |
ⓘ | Greigite | 2.DA.05 | Fe2+Fe3+2S4 |
ⓘ | Schöllhornite | 2.FB.05 | Na0.3CrS2 · H2O |
ⓘ | Caswellsilverite | 2.FB.05 | NaCrS2 |
ⓘ | Djerfisherite | 2.FC.05 | K6(Fe,Cu,Ni)25S26Cl |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Spinel | 4.BB.05 | MgAl2O4 |
Group 9 - Silicates | |||
ⓘ | Forsterite | 9.AC.05 | Mg2SiO4 |
ⓘ | Roedderite | 9.CM.05 | K(◻Na)Mg2Mg3[Si12O30] |
ⓘ | Enstatite | 9.DA.05 | Mg2Si2O6 |
ⓘ | var. Bronzite | 9.DA.05 | (Mg,Fe2+)2[SiO3]2 |
ⓘ | Pigeonite | 9.DA.10 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
ⓘ | Augite var. Fassaite | 9.DA.15 | (Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6] |
ⓘ | 9.DA.15 | (CaxMgyFez)(Mgy1Fez1)Si2O6 | |
ⓘ | Diopside | 9.DA.15 | CaMgSi2O6 |
ⓘ | Nepheline | 9.FA.05 | Na3K(Al4Si4O16) |
ⓘ | Albite | 9.FA.35 | Na(AlSi3O8) |
Unclassified | |||
ⓘ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
ⓘ | 'Silica' | - | |
ⓘ | 'Fayalite-Forsterite Series' | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Schöllhornite | Na0.3CrS2 · H2O |
C | Carbon | |
C | ⓘ Graphite | C |
N | Nitrogen | |
N | ⓘ Osbornite | TiN |
O | Oxygen | |
O | ⓘ Albite | Na(AlSi3O8) |
O | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
O | ⓘ Diopside | CaMgSi2O6 |
O | ⓘ Enstatite | Mg2Si2O6 |
O | ⓘ Forsterite | Mg2SiO4 |
O | ⓘ Nepheline | Na3K(Al4Si4O16) |
O | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
O | ⓘ Roedderite | K(◻Na)Mg2Mg3[Si12O30] |
O | ⓘ Spinel | MgAl2O4 |
O | ⓘ Schöllhornite | Na0.3CrS2 · H2O |
O | ⓘ Enstatite var. Bronzite | (Mg,Fe2+)2[SiO3]2 |
O | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
O | ⓘ Augite var. Fassaite | (Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6] |
Na | Sodium | |
Na | ⓘ Albite | Na(AlSi3O8) |
Na | ⓘ Caswellsilverite | NaCrS2 |
Na | ⓘ Nepheline | Na3K(Al4Si4O16) |
Na | ⓘ Roedderite | K(◻Na)Mg2Mg3[Si12O30] |
Na | ⓘ Schöllhornite | Na0.3CrS2 · H2O |
Na | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Na | ⓘ Augite var. Fassaite | (Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6] |
Mg | Magnesium | |
Mg | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Mg | ⓘ Diopside | CaMgSi2O6 |
Mg | ⓘ Enstatite | Mg2Si2O6 |
Mg | ⓘ Forsterite | Mg2SiO4 |
Mg | ⓘ Niningerite | (Mg,Fe2+,Mn2+)S |
Mg | ⓘ Oldhamite | (Ca,Mg)S |
Mg | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Mg | ⓘ Roedderite | K(◻Na)Mg2Mg3[Si12O30] |
Mg | ⓘ Spinel | MgAl2O4 |
Mg | ⓘ Enstatite var. Bronzite | (Mg,Fe2+)2[SiO3]2 |
Mg | ⓘ Augite var. Fassaite | (Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6] |
Al | Aluminium | |
Al | ⓘ Albite | Na(AlSi3O8) |
Al | ⓘ Nepheline | Na3K(Al4Si4O16) |
Al | ⓘ Spinel | MgAl2O4 |
Al | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Al | ⓘ Augite var. Fassaite | (Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6] |
Si | Silicon | |
Si | ⓘ Albite | Na(AlSi3O8) |
Si | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Si | ⓘ Diopside | CaMgSi2O6 |
Si | ⓘ Enstatite | Mg2Si2O6 |
Si | ⓘ Forsterite | Mg2SiO4 |
Si | ⓘ Nepheline | Na3K(Al4Si4O16) |
Si | ⓘ Perryite | (Ni,Fe)5(Si,P)2 |
Si | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Si | ⓘ Roedderite | K(◻Na)Mg2Mg3[Si12O30] |
Si | ⓘ Enstatite var. Bronzite | (Mg,Fe2+)2[SiO3]2 |
Si | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Si | ⓘ Augite var. Fassaite | (Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6] |
P | Phosphorus | |
P | ⓘ Perryite | (Ni,Fe)5(Si,P)2 |
P | ⓘ Schreibersite | (Fe,Ni)3P |
S | Sulfur | |
S | ⓘ Bornite | Cu5FeS4 |
S | ⓘ Caswellsilverite | NaCrS2 |
S | ⓘ Covellite | CuS |
S | ⓘ Daubréelite | Fe2+Cr23+S4 |
S | ⓘ Djerfisherite | K6(Fe,Cu,Ni)25S26Cl |
S | ⓘ Greigite | Fe2+Fe23+S4 |
S | ⓘ Idaite | Cu5FeS6 |
S | ⓘ Niningerite | (Mg,Fe2+,Mn2+)S |
S | ⓘ Oldhamite | (Ca,Mg)S |
S | ⓘ Smythite | (Fe,Ni)3+xS4 (x=0-0.3) |
S | ⓘ Sphalerite | ZnS |
S | ⓘ Schöllhornite | Na0.3CrS2 · H2O |
S | ⓘ Troilite | FeS |
S | ⓘ Wassonite | TiS |
Cl | Chlorine | |
Cl | ⓘ Djerfisherite | K6(Fe,Cu,Ni)25S26Cl |
K | Potassium | |
K | ⓘ Djerfisherite | K6(Fe,Cu,Ni)25S26Cl |
K | ⓘ Nepheline | Na3K(Al4Si4O16) |
K | ⓘ Roedderite | K(◻Na)Mg2Mg3[Si12O30] |
Ca | Calcium | |
Ca | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Ca | ⓘ Diopside | CaMgSi2O6 |
Ca | ⓘ Oldhamite | (Ca,Mg)S |
Ca | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Ca | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Ca | ⓘ Augite var. Fassaite | (Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6] |
Ti | Titanium | |
Ti | ⓘ Osbornite | TiN |
Ti | ⓘ Augite var. Fassaite | (Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6] |
Ti | ⓘ Wassonite | TiS |
Cr | Chromium | |
Cr | ⓘ Caswellsilverite | NaCrS2 |
Cr | ⓘ Daubréelite | Fe2+Cr23+S4 |
Cr | ⓘ Schöllhornite | Na0.3CrS2 · H2O |
Mn | Manganese | |
Mn | ⓘ Niningerite | (Mg,Fe2+,Mn2+)S |
Fe | Iron | |
Fe | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Fe | ⓘ Bornite | Cu5FeS4 |
Fe | ⓘ Daubréelite | Fe2+Cr23+S4 |
Fe | ⓘ Djerfisherite | K6(Fe,Cu,Ni)25S26Cl |
Fe | ⓘ Greigite | Fe2+Fe23+S4 |
Fe | ⓘ Idaite | Cu5FeS6 |
Fe | ⓘ Iron | Fe |
Fe | ⓘ Iron var. Kamacite | (Fe,Ni) |
Fe | ⓘ Niningerite | (Mg,Fe2+,Mn2+)S |
Fe | ⓘ Perryite | (Ni,Fe)5(Si,P)2 |
Fe | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Fe | ⓘ Schreibersite | (Fe,Ni)3P |
Fe | ⓘ Smythite | (Fe,Ni)3+xS4 (x=0-0.3) |
Fe | ⓘ Troilite | FeS |
Fe | ⓘ Enstatite var. Bronzite | (Mg,Fe2+)2[SiO3]2 |
Fe | ⓘ Augite var. Fassaite | (Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6] |
Ni | Nickel | |
Ni | ⓘ Djerfisherite | K6(Fe,Cu,Ni)25S26Cl |
Ni | ⓘ Iron var. Kamacite | (Fe,Ni) |
Ni | ⓘ Perryite | (Ni,Fe)5(Si,P)2 |
Ni | ⓘ Schreibersite | (Fe,Ni)3P |
Ni | ⓘ Smythite | (Fe,Ni)3+xS4 (x=0-0.3) |
Cu | Copper | |
Cu | ⓘ Bornite | Cu5FeS4 |
Cu | ⓘ Covellite | CuS |
Cu | ⓘ Djerfisherite | K6(Fe,Cu,Ni)25S26Cl |
Cu | ⓘ Idaite | Cu5FeS6 |
Zn | Zinc | |
Zn | ⓘ Sphalerite | ZnS |
Other Regions, Features and Areas containing this locality
Antarctic MeteoritesGroup of Meteorite Fall Locations
Antarctic PlateTectonic Plate
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References
Nakamura-Messenger, Keiko, Keller, Lindsay, Messenger, Scott, Rubin, Alan, Choi, Byeon-Gak, Petaev, Michail I., Clemett, Simon J., Zhang, Shouliang, Zia, Rahman, Oikawa, Katsunari (2011) The Formation of Wassonite: A New Titanium Monosulfide Mineral in the Yamato 691 Enstatite Chondrite. Workshop on Formation of the First Solids in the Solar System, LPI Contribution No. 1639. 9091-9092