| Acapulcoite | |
|---|---|
| — Group — | |
.jpg) NWA 2989, an example of an acapulcoite meteorite | |
| Type | Achondrite |
| Structural classification | ? |
| Class | Primitive achondrite |
| Subgroups |
|
| Parent body | Unknown |
| Composition | Olivine, orthopyroxene, plagioclase, meteoric iron, troilite |
| Total known specimens | Fifty two |
| Alternative names | Acapulcoites, Acapulcoite group, Acapulcoite meteorites |
Acapulcoites are a group of the primitive achondrite class of stony meteorites.
Naming and history
The acapulcoites are named after the only specimen of the group, with a witnessed fall. The Acapulco meteorite fell on 11 August 1976 at 11:00 near El Quemado Colony ( 16°52′59″N 99°54′00″W / 16.883°N 99.9°W), outside Acapulco, Guerrero, Mexico. The stone was retrieved 15 minutes afterwards from a 30 centimetres (12 in) deep crater and was cool to the touch. [1] It had a mass of 1,914 grams (67.5 oz). Following that discovery, 52 meteorite specimens have been classified as acapulcoites. [2]
Chemical composition
Acapulcoites are primarily composed of olivine, orthopyroxene, plagioclase, meteoric iron, and troilite.
Like all primitive achondrites, acapulcoites have chemical composition and mineralogical similarities with chondrites, [3] and some specimens even show relict chondrules. Their mineral composition lies between H and E chondrites. [3]
See also
References
- ^ "Acapulco". Meteoritical Bulletin Database. Retrieved 10 December 2012.
- ^ "Meteoritical Bulletin Database". Meteoritical Bulletin. Retrieved 10 December 2012.
- ^ a b "PAC Group - Primitive Achondrites". Meteorite.fr. Archived from the original on 26 December 2012. Retrieved 10 December 2012.