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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  (2024)  Lunar (melt breccia)
Recommended:  Lunar (melt breccia)    [explanation]

This is 1 of 31 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 Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?
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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 33 approved meteorites from Tiris Zemmour, Mauritania (plus 1 impact crater)
     This is 1 of 232 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)
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