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Bir Moghrein
Basic information Name: Bir Moghrein
     This is an OFFICIAL meteorite name.
Abbreviation: BiM 001
Observed fall: No
Year found: 2016
Country: Mauritania
Mass:help 11 kg
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Diogenite-olivine
Recommended:  Diogenite-olivine    [explanation]

This is 1 of 12 approved meteorites classified as Diogenite-olivine.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 26 Nov 2016
Writeuphelp
Writeup from MB 105:

Bir Moghrein         25°54.790’N, 11°59.431’W

Tiris Zemmour, Mauritania

Find: 2016 Apr 11

Classification: HED achondrite (Diogenite, olivine)

History: (H. Chennaoui Aoudjehane) Found on 11 April 2016 by Mouloud Bachikh and his brother Bdyad during a search for meteorites in the area of Lamlawiya, close to Wad Tismar and Khang Ar Ramla, in the military zone of the Moroccan frontier with Mauritania. A few days after the first find, many hunters came to the site searching for other pieces, but only a few pieces were found after the initial discovery of the large stone.

Physical characteristics: (H. Chennaoui Aoudjehane, FSAC) One big piece of ~11 kg and 10 small fragments totaling 150 g were found. The rock is coarse grained, brown-green colored, and its surface is shiny. Green olivine crystals are visible, and brownish pyroxene grains predominate, both millimeter sized. A very few clear plagioclase grains are present. Some regmaglypts were noted on the surface of the rock, which shows a very few relict patches of fusion crust.

Petrography: (C. Agee, UNM) This meteorite consists of ~90% orthopyroxene, ~5% olivine, and ~2% plagioclase, and trace amounts of augite. Chromite and troilite are ubiquitous accessory phases. Heavily shocked, plagioclase has been converted to maskelynite.

Geochemistry: (C. Agee, UNM) Olivine Fa23.2±0.4, Fe/Mn=51±3, n=19; low-Ca pyroxene Fs21.0±0.7Wo2.4±0.5, Fe/Mn=28±1, n=10; plagioclase An87.2±2.0, n=11.

Classification: Diogenite-olivine

Specimens: 18.7 and 1.3 g at FSAC, probe mount at UNM. Mouloud Bachikh holds the main mass.

Data from:
  MB105
  Table 0
  Line 0:
State/Prov/County:Tiris Zemmour
Origin or pseudonym:Wad Tismar; Khang Ar Ramla
Date:2016 Apr 11
Latitude:25°54.790'N
Longitude:11°59.431'W
Mass (g):11000
Pieces:11
Class:Diogenite-olivine
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):23.2±0.4
Ferrosilite (mol%):21.0±0.7
Wollastonite (mol%):2.4±0.5
Magnetic suscept.:3.26
Classifier:C. Agee, UNM
Type spec mass (g):20.0
Type spec location:FSAC, UNM
Main mass:Mouloud Bachikh, Smara, Morocco
Finder:Mouloud Bachikh, Smara, Morocco
Comments:Submitted by Hasnaa Chennaoui Aoudjehane FSAC, Carl Agee UNM
Institutions
   and collections
FSAC: Universite Hassan II Casablanca, Faculte des Sciences Ain Chock, Departement de Géologie, BP 5366 Maârif, Casablanca, Morocco (institutional address; updated 9 Jan 2013)
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography:

Mauritania
Coordinates:
     Recommended::   (25° 54' 47"N, 11° 59' 26"W)

Statistics:
     This is 1 of 9 approved meteorites from Tiris Zemmour, Mauritania (plus 1 impact crater)
     This is 1 of 103 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)
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Synonymshelp: Bir Moghrein 001 (First meteorite in DCA)

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