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Bir Ounane 005
Basic information Name: Bir Ounane 005
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2022
Country: Mali
Mass:help 20 g
Classification
  history:
Recommended:  Lunar    [explanation]

This is 1 of 108 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 11 Apr 2024
Writeuphelp
Writeup from MB 113:

Bir Ounane 005        21°15.4500’N, 3°14.9167’W

Gao, Mali

Find: 2022

Classification: Lunar meteorite

History: Found in 2022 during a search of meteorites in the desert; later acquired by Jose Garcia in 2022.

Physical characteristics: Two pieces with minor fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample is a polymict breccia comprised of mm-sized lithic and mineral clasts/fragments, and impact glass spherules, set within a fine-grained matrix. Lithic clast lithologies identified include: anorthosites, basalts, impact melt clasts, noritic anorthosites, norites, and high-Fe clasts; mineral clast fragments of irregularly zoned pyroxenes, fayalitic olivine, pleonaste spinel, and silica are also present. Accessory phases identified include Ca-phosphates and troilite.

Geochemistry: Olivine (Fa67.7±29.2, range Fa14.0-97.8, Fe/Mn=82±6, n=14), Pigeonite (Fs47.2±12.3Wo17.8±3.9, range Fs30.0-83.3Wo9.9-24.5, Fe/Mn=54±6, n=20), High-Ca Pyroxene (Fs35.7±11.8Wo33.2±4.9, range Fs11.8-55.2Wo25.2-41.1, Fe/Mn=53±8, n=16), Calcic Plagioclase (An94.3±2.2, range An90.0-97.1, n=21).

Classification: Lunar (regolith breccia) due to its brecciated nature, clast diversity, and the presence of impact glass spherules.

Specimens: 4.8 g at Cascadia, main mass and one thin section with Jose Garcia in MCM.

Data from:
  MB113
  Table 0
  Line 0:
State/Prov/County:Gao
Origin or pseudonym:Desert
Date:2022
Latitude:21°15.4500'N
Longitude:3°14.9167'W
Mass (g):20
Pieces:2
Class:Lunar
Shock stage:high
Weathering grade:low
Fayalite (mol%):67.7±29.2
Ferrosilite (mol%):47.2±12.3, 35.7±11.8
Wollastonite (mol%):17.8±3.9, 33.2±4.9
Classifier:D. Sheikh, Cascadia
Type spec mass (g):4.8
Type spec location:Cascadia
Main mass:Jose Garcia
Comments:CML 1553; submitted by Daniel Sheikh
Institutions
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
MCM: Museo Canario de Meteoritos Las Palmas de Gran Canaria, Spain (institutional address; updated 26 Nov 2016)
Catalogs:
References: Published in Meteoritical Bulletin, no. 113, in preparation (2024)
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Fabián   
Geography:

Mali
Coordinates:
     Recommended::   (21° 15' 27"N, 3° 14' 55"W)

Statistics:
     This is 1 of 34 approved meteorites from Gao, Mali (plus 1 unapproved name)
     This is 1 of 123 approved meteorites from Mali (plus 2 unapproved names)
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