Pyroxene pallasite grouplet
Subdivision of pallasite meteorites
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The pyroxene pallasite grouplet is a subdivision of the pallasite meteorites (stony-irons).[1]
| Pyroxene pallasite grouplet | |
|---|---|
| — Grouplet — | |
| Type | Stony-iron |
| Class | Pallasite |
| Composition | Meteoric iron, silicate minerals (pyroxene) |
| Total known specimens | 2 |
The grouplet is named "pyroxene pallasites" because they are the only pallasites that contain pyroxene. The grouplet was proposed in 1995.[2] It currently has only two members: the Vermillion and Yamato 8451 meteorite. Both meteorites contain pyroxene and have a number of other similarities: for example their pyroxene composition, rare-earth element concentrations, and oxygen isotope ratios. However, there are also indicators against the grouping of these two meteorites: for example the texture and occurrence of cohenite in the Vermillion meteorite and the differing siderophile trace element concentrations.[2]