Meteoritical Bulletin: Entry for Bir Ounane 002

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Bir Ounane 002

Basic information

Name: Bir Ounane 002
This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2022
Country: Mali
Mass: 30 g

Classification
history:

Recommended:

Eucrite-br [explanation]

This is 1 of 218 approved meteorites classified as Eucrite-br. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 7 Jan 2023

Writeup

help

Writeup from MB 112:

Bir Ounane 002 21°52’1.78"N, 3°16’51.61"W

Gao, Mali

Find: September 15, 2022

Classification: HED achondrite (Eucrite, brecciated)

History: The meteorite was found on September 15, 2022, in Northern Mali and subsequently purchased by the main mass holder from Mr. J. Z. Sidi, Spain.

Physical characteristics: Grayish rock largely covered with fusion crust.

Petrography: Fragmental breccia composed of up to 8 mm sized basaltic, small black melt, and mineral clasts in a fine-grained clastic mineral matrix. Predominant minerals are up to 1 mm sized exsolved pyroxene and calcic plagioclase. Minor phases include silica, chromite, FeS, and ilmenite. No metallic iron detected. Contains thin shock melt veins.

Geochemistry: low-Ca pyroxene host to augite exsolution lamellae: Fs_60.2±0.2Wo_1.6±0.1(Fs_59.6-60.2Wo_1.5-1.6, FeO/MnO=29-31, n=7); augite exsolution lamellae: Fs_28.0±1.6Wo_40.8±2.1(Fs_26.1-31.2Wo_36.5-42.0, FeO/MnO=28-30, n=7); calcic plagioclase: An_88.6±0.8(An_88.3-90.0, n=7)

Data from:
  MB112
  Table 0
  Line 0:

State/Prov/County:	Gao
Date:	September 15, 2022
Latitude:	21°52'1.78"N
Longitude:	3°16'51.61"W
Mass (g):	30
Pieces:	1
Class:	Eucrite-br
Shock stage:	moderate
Weathering grade:	moderate
Ferrosilite (mol%):	60.2; 28.0
Wollastonite (mol%):	1.6; 40.8
Classifier:	A. Greshake, MNB
Type spec mass (g):	6.0
Type spec location:	MNB
Main mass:	Michel Haak
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 111, in preparation (2023)

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Geography:

Mali

Mali

Coordinates:
Recommended::	(21° 52' 2"N, 3° 16' 52"W)

Statistics:
This is 1 of 21 approved meteorites from Gao, Mali (plus 1 unapproved name)
This is 1 of 85 approved meteorites from Mali (plus 2 unapproved names)

Proximity search:

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