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Choum 001
Basic information Name: Choum 001
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2021
Country: Mauritania
Mass:help 39 kg
Classification
  history:
Recommended:  Lunar (anorth)    [explanation]

This is 1 of 78 approved meteorites classified as Lunar (anorth).   [show all]
Search for other: Lunar meteorites
Comments: Approved 19 Feb 2022
Writeuphelp
Writeup from MB 111:

Choum 001        21.30°N, 12.96°W

Adrar, Mauritania

Find: 2021 Mar 28

Classification: Lunar meteorite (anorth)

History: This stone was found by Mohamed Biba Abdalahi on March 28, 2021, near Choum, Adrar, Mauritania. In September 2021, the main mass was exported by Rock & Co Society to its owner, Pascal Maugein, member of the French Astronomical Society, who provided the type specimen for classification.

Physical characteristics: A single gray, irregular stone. Cut surface show a gray interior with small vesicles and darker clasts up to cm.

Petrography: (J. Gattacceca, CEREGE) Igneous rock composed primarily of calcic plagioclase (about 90 vol%) and olivine. The texture, with the feldspathic groundmass containing skeletal olivine to 100 µm, and abundant vesicles with typical size 50 µm and up to 200 µm, indicate that the meteorite is a melt rock. The darker clasts observable on the cut surface are also melt rock. Rare troilite to 10 µm. Metal, chromite and ilmenite were not observed.

Geochemistry: Plagioclase An96.5±0.3Ab3.3±0.3Or0.1±0.0 (n=5). Olivine Fa23.0±3.2, range Fa19.8-27.6, FeO/MnO = 89.0±15.6.

Classification: Lunar ferroan anorthosite, melt breccia. Plagioclase content, and olivine and plagioclase composition place this meteorite in the ferroan anorthositic suite (FAS) defined by Warren (1993).

Specimens: Type specimen at CEREGE. Main mass with Pascal Maugein.

Bibliography:
  • Warren P.H. (1993) A concise compilation of petrologic information on possibly pristine nonmare Moon rocks. American Mineralogist 78 (3-4), 360-376. (link)
Data from:
  MB111
  Table 0
  Line 0:
State/Prov/County:Adrar
Date:2021 Mar 28
Latitude:21.30°N
Longitude:12.96°W
Mass (g):39000
Pieces:1
Class:Lunar (anorth)
Weathering grade:low
Fayalite (mol%):23.0±3.2 (n=5)
Magnetic suscept.:2.09
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):22
Type spec location:CEREGE
Main mass:Pascal Maugein
Finder:anonymous
Comments:work name CM94; submitted by Jérôme Gattacceca
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. 111, in preparation (2022)
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Photos:
CreditPhotos
Public domain photographs:
Jerome Gattacceca   
Geography:

Mauritania
Coordinates:
     Recommended::   (21° 18' 0"N, 12° 57' 36"W)

Statistics:
     This is 1 of 7 approved meteorites from Adrar, Mauritania (plus 1 impact crater)
     This is 1 of 176 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)
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