Northwest Africa 2286 2.7g
Northwest Africa
Purchased 2003
Achondrite (olivine-rich diogenite)
A single stone of 82 g was found 2003 by an anonymous finder in the Occidental Sahara and purchased in 2003 in Morocco. Classification and mineralogy (A. Greshake, MNB): is dominated by large blocky orthopyroxene crystals and ~20% large olivine phenocrysts; minor phases include FeS, and Fe-Al-Cr-spinel; orthopyroxene, Fs21.9Wo1.5, olivine, Fa26.8; low degree of shock; moderately to strongly weathered and very friable; most likely paired with NWA 1877. Specimens: main mass with anonymous finder; type specimen 23.5 g plus one polished thin section MNB.
Origin or pseudonym: |
Morocco |
Date: |
2003 |
Mass (g): |
82 |
Pieces: |
1 |
Class: |
Dio |
Weathering grade: |
moderate |
Fayalite (mol%): |
26.8 |
Ferrosilite (mol%): |
21.9 |
Classifier: |
A. Greshake, MNB |
Type spec mass (g): |
23.5 |
Main mass: |
Peter Marmet, Bern, Switzerland |
Comments: |
see separate entry |


5320元台幣