Yamato 691
From Infogalactic: the planetary knowledge core
| Yamato 691 | |
|---|---|
| Type | Chondrite |
| Class | Enstatite chondrite |
| Composition | Pl(An32-75), En99.2Wo-0.3, tro., nini., oldh., perr., schr., metal(2.2-2.5%Ni, 0.16-0.22%Co)[1] |
| Country | Antarctica |
| Region | Queen Fabiola Mountains (Yamato Mountains) |
| Coordinates | Lua error in package.lua at line 80: module 'strict' not found.[2] |
| Observed fall | No |
| Fall date | 4.5 billion years ago |
| Found date | December 21, 1969 |
| TKW | 715 grams (1.576 lb) |
The Yamato 691 (abbreviated Y-691) is the 4.5 billion year old chondrite meteorite discovered by members of the Japanese Antarctic Research Expedition[3] on the blue ice field of the Queen Fabiola Mountains (Yamato Mountains) in Antarctica, on December 21, 1969.[2]
History
Yamato 691 was one among 9 meteorite specimens identified by the Japanese Expedition Team in 1969. It was later studied at the Max Planck Institute for Chemistry, Mainz, Germany.[4]
On April 2011, NASA and co-researchers from the United States, South Korea and Japan have found a new mineral named "Wassonite" in Yamato 691.[5]
Composition and classification
This meteorite is a stony enstatite chondrite. Minerals reported from the meteorite include:[6]
- Troilite
- Spinel
- Augite
- Diopside
- Enstatite
- Pigeonite
- Albite
- Nepheline
- Iron
- Olivine
- Wassonite - discovered in April, 2011
See also
References
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
