![]() |
||
|
Northwest Africa 12545 | |||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 12545 This is an OFFICIAL meteorite name. Abbreviation: NWA 12545 Observed fall: No Year found: 2018 Country: Morocco Mass: ![]() | ||||||||||||||||||||||||||
Classification history: |
This is 1 of 53 approved meteorites classified as Brachinite. [show all] Search for other: Brachinites, Primitive achondrites | ||||||||||||||||||||||||||
Comments: | Approved 15 May 2019 | ||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 108:
Northwest Africa 12545 (NWA 12545) Morocco Find: 2018 Classification: Primitive achondrite (Brachinite) History: The stone was purchased in Agadir in 2018. Physical characteristics: A single light brown stone with cracks and without fusion crust. Cut face shows a homogeneous dark interior with small crystals. Petrography: (J. Gattacceca, CEREGE) Dunitic rock with equigranular texture. Olivine, with typical size 250 μm, is the ultradominant mineral (about 90 vol%). Other minerals are Ca-pyroxene, chromite (to 200 μm). Symplectic associations of iron oxi-hydroxides (from weathering of primary metal) and orthopyroxene (10 μm) are found along grain boundaries. Most metal and sulfide are weathered. Metal survives in the form of grains to 20 μm in the silicates. No plagioclase was found. Geochemistry: Olivine Fa29.3±0.3, Fe/Mn=57.5±4.7 (n=4), Ca-pyroxene Fs10.9±0.2Wo45.1±0.5, Fe/Mn=51.0±17.5 (n=6), low-Ca pyroxene Fs26.2Wo1.1 (n=1), chromite Cr#=0.74. Classification: Achondrite (brachinite). Likely paired with NWA 7904, NWA 10637, and NWA 11756. Specimens: Type specimen at CEREGE. Main mass with Jean Redelsperger. | ||||||||||||||||||||||||||
Data from: MB108 Table 0 Line 0: |
|
||||||||||||||||||||||||||
Institutions and collections |
CEREGE: CEREGE
BP 80
Avenue Philibert, Technopole de l'Arbois
13545 Aix-en-Provence Cedex 4
France, France (institutional address; updated 29 Oct 2018) |
||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
| ||||||||||||||||||||||||||
Geography:![]() |
Statistics: This is 1 of 1556 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater) |