Meteoritical Bulletin: Entry for Northwest Africa 13185

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Northwest Africa 13185

Basic information

Name: Northwest Africa 13185
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13185
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 300 g

Classification
history:

Recommended:

Lunar (feldsp. breccia) [explanation]

This is 1 of 214 approved meteorites classified as Lunar (feldsp. breccia). [show all]
Search for other: Lunar meteorites

Comments:

Approved 29 Feb 2020

Writeup

help

Writeup from MB 109:

Northwest Africa 13185 (NWA 13185)

(Northwest Africa)

Purchased: 2019 Mar

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased in Agadir, Morocco by Aziz Habibi in March 2019.

Physical characteristics: The dark brown stones exhibit diffuse small clasts in a very fine grained matrix.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of small mineral clasts plus sparse lithic clasts (including microgabbro and some quench-textured glassy beads) set in a fine grained, partly glassy and microvesicular matrix. Minerals include anorthite, olivine, orthopyroxene, pigeonite, ferropigeonite and augite together with accessory Ti chromite, ilmenite, zircon, kamacite and secondary barite.

Geochemistry: Olivine (Fa_28.2-45.8, FeO/MnO = 97-125, N = 5), orthopyroxene (Fs_41.0-43.0Wo_2.4-2.9, FeO/MnO = 57-66, N = 2), pigeonite (Fs_46.5Wo_5.4; Fs_27.6Wo_8.5; Fs_28.0-28.7Wo_11.0-10.4; Fs_44.2Wo_16.9; FeO/MnO = 53-61, N = 5), ferropigeonite (Fs_60.7Wo_18.7, FeO/MnO = 74), augite (Fs_22.3Wo_40.1, FeO/MnO = 50; Fs_46.9Wo_38.9, FeO/MnO = 68; N = 2), anorthite (An_95.8-97.1Or_0.3-0.1, N = 3).

Classification: Lunar (feldspathic breccia).

Specimens: 20.3 g including one polished piece at UWB; 100 g with Mr. M. Stream; remainder with A. Habibi.

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Agadir
Date:	P 2019 Mar
Mass (g):	300
Pieces:	several
Class:	Lunar (feldsp. breccia)
Shock stage:	high
Weathering grade:	low
Fayalite (mol%):	28.2-45.8
Ferrosilite (mol%):	41.0-43.0; 27.6-28.7; 22.3; 46.9
Wollastonite (mol%):	2.4-2.9; 8.5-11.0; 40.1; 38.9
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	20.3
Type spec location:	UWB
Main mass:	A. Habibi
Comments:	Work name AH 726; submitted by A. Irving

Institutions
and collections

UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 109, in preparation (2020)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7579 approved meteorites from (Northwest Africa) (plus 1969 unapproved names)

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