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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:help 92 g
Recommended:  Eucrite-br    [explanation]

This is 1 of 200 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 25 Apr 2021
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: Fs59.9±1.1Wo2.3±0.7, Fe/Mn=29.3±1.2, N=23; High-Ca pyroxene Fs26.5±2.2Wo42.3±2.3, N=18; plagioclase An86.6±0.8Or0.9±0.1Ab12.5±0.9, N=23; spinel mineral (Sp10.4±4.3Usp34.2±13.3Cm55.4±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:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2012
Mass (g):92
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
   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 21 Jan 2019)
Hmani: A. Hmani Moroccan Imports, 13 rue Jules Hardouin Mansart, 92600 Asnières, France (private address)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 8136 approved meteorites from (Northwest Africa) (plus 1942 unapproved names)

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