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Bir Moghrein 003
Basic information Name: Bir Moghrein 003
     This is an OFFICIAL meteorite name.
Abbreviation: BiM 003
Observed fall: No
Year found: 2023
Country: Mauritania
Mass:help 1400 g
Classification
  history:
Meteoritical Bulletin:  MB 112  (2023)  Lunar (melt breccia)
Recommended:  Lunar (melt breccia)    [explanation]

This is 1 of 28 approved meteorites classified as Lunar (melt breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 10 Nov 2023
Writeuphelp
Writeup from MB 112:

Bir Moghrein 003 (BiM 003)        25.333332°N, 10.516667°W

Tiris Zemmour, Mauritania

Purchased: 2023

Classification: Lunar meteorite (melt breccia)

Petrography: (K. Metzler, IfP) Achondritic clast-rich melt rock, consisting of lithic clasts (up to several cm) and mineral fragments (plagioclase, olivine, exsolved pyroxene) set in a fine-grained crystallized melt. A heavily shocked olivine-gabbro clast with a size of ~2.5 cm was found. The crystallized melt is dominated by plagioclase, with smaller amounts of olivine and pyroxene. Accessories are Cr-Al-spinel,ilmenite, and Ni-bearing metal.

Geochemistry: Mineral compositions and geochemistry: Mean olivine composition: Fa14.8±0.6 (Fa13.9-15.9); Fe/Mn (at.): 92; n=9. Mean composition of low-Ca pyroxene (host): Fs15.5±2.8Wo2.6±0.7 (Fs12.2-18.2Wo1.9-3.7); Fe/Mn (at.): 51; n=5. Mean composition of Ca-rich pyroxene (exsolution lamellae): Fs8.3±1.8Wo42.5±1.5 (Fs5.4-10.8Wo40.8-45.1); n=7. Mean plagioclase composition: An95.9±1.4Or0.0±0.1 (An93.1-97.0Or0.0-0.3); n=7.

Classification: Lunar melt breccia, based on texture, mean Fe/Mn value in olivine, and high An values in plagioclase.

Specimens: Largest piece: ~400 g.

Data from:
  MB112
  Table 0
  Line 0:
State/Prov/County:Tiris Zemmour
Place of purchase:Mauritania
Date:P 2023
Latitude:25.333332°N
Longitude:10.516667°W
Mass (g):1400
Pieces:Many
Class:Lunar (melt breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):14.8±0.6
Ferrosilite (mol%):15.5±2.8; 8.3±1.8
Wollastonite (mol%):2.6±0.7; 42.5±1.5
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Said Muftah Bachir, Western Sahara
Comments:Submitted by K. Metzler, IfP
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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Photos:
CreditPhotos
Public domain photographs:
Knut Metzler      
Geography:

Mauritania
Coordinates:
     Recommended::   (25° 20'N, 10° 31'W)

Statistics:
     This is 1 of 29 approved meteorites from Tiris Zemmour, Mauritania (plus 1 impact crater)
     This is 1 of 224 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)
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