Meteoritical Bulletin: Entry for Northwest Africa 13743

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Northwest Africa 13743

Basic information

Name: Northwest Africa 13743
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13743
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass: 92 g

Classification
history:

Recommended:

Eucrite-br [explanation]

This is 1 of 225 approved meteorites classified as Eucrite-br. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 25 Apr 2021

Writeup

help

Writeup from MB 110:

Northwest Africa 13743 (NWA 13743)

(Northwest Africa)

Purchased: 2012

Classification: HED achondrite (Eucrite, brecciated)

History: Type specimen donated to Cascadia by Mohammed Hmani at the Tucson Gem Show in 2020.

Physical characteristics: Physical Characteristics: Single stone with black fusion crust on exterior. Broken surface is light-tones and fine-grained, with small (<1 mm) white clasts and rust spots.

Petrography: (M. Hutson, A. Ruzicka, Cascadia): Dominantly granoblastic texture with occasional larger feldspar mineral clasts and indistinct mafic and feldspar-rich lithic clasts (up to about 1 mm across). Rust haloes are concentrated in fine-grained lithic clasts which contain abundant metal and sulfide. Accessory minerals include fluorapatite, silica polymorph, ilmenite, spinel mineral, troilite, Fe-metal (Ni <0.4 wt%), zircon.

Geochemistry: Mineral compositions and geochemistry: Low-Ca pyroxene: Fs_59.9±1.1Wo_2.3±0.7, Fe/Mn=29.3±1.2, N=23; High-Ca pyroxene Fs_26.5±2.2Wo_42.3±2.3, N=18; plagioclase An_86.6±0.8Or_0.9±0.1Ab_12.5±0.9, N=23; spinel mineral (Sp_10.4±4.3Usp_34.2±13.3Cm_55.4±9.2).

Classification: Eucrite (Brecciated) based on mineralogy, mineral compositions and textures.

Specimens: Cascadia holds 18.8 g in three pieces, as well as a polished thin section and butt.

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Erfoud
Date:	P 2012
Mass (g):	92
Pieces:	1
Class:	Eucrite-br
Weathering grade:	low
Ferrosilite (mol%):	59.9±1.1 (N=23)
Wollastonite (mol%):	2.3±0.7 (N=23)
Classifier:	M. Hutson and A. Ruzicka, Cascadia
Type spec mass (g):	18.8
Type spec location:	Cascadia
Main mass:	HMANI Inc.
Comments:	Lab number CML 1318, HMANI identification Tuc 01; submitted by Melinda Hutson

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)
USP: Museu de Geociências - USP Rua do Lago, 562 CEP: 05508-080 Butantã - SP Brazil, Brazil; Website (institutional address; updated 22 Oct 2022)
Hmani: A. Hmani Moroccan Imports, 13 rue Jules Hardouin Mansart, 92600 Asnières, France (private address)

Catalogs:

References:

Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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