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Northwest Africa 15189
Basic information Name: Northwest Africa 15189
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15189
Observed fall: No
Year found: 2021
Country: Mauritania
Mass:help 513 g
Meteoritical Bulletin:  MB 111  (2023)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 414 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 6 Aug 2022
Writeup from MB 111:

Northwest Africa 15189 (NWA 15189)

Ouargla, Mauritania

Find: Oct 2021

Classification: HED achondrite (Eucrite, polymict)

History: TKW: 516g - 5 individual Stones. Found: Ouargla, Algeria early 2021 by anonymous finder. Purchased in Algeria by Younes Chaoui in october 2021. Purchased by Gemma Thomas from Younes Chaoui March 2022 and sent for classification at UPlym.

Physical characteristics: Five weathered stones with some pale crystals visible at the surface. The sample does not preserve a fusion crust, and instead displays desert varnish across the majority of each stone.

Petrography: Polymict eucrite breccia with at least three distinct basaltic eucritic lithologies preserved, composed predominantly of plagioclase (48.5 vol%), low-Ca pyroxene (31.0 vol%), and high Ca-pyroxene (15.4 vol%), with accessory silica phase (3.0 vol%), troilite, chromite, ilmenite, Fe-metal, and zircon. A minor amount of diogenitic pyroxene (Fs<32, <10 vol%) entrained in the matrix. Clasts are relatively rounded and measure up to 5.4 mm in size. Matrix preserves abundant areas of melt with fine dendritic intergrowths of pyroxene and plagioclase. Ca-weathering products infill fractures and barite is present throughout.

Geochemistry: Low-Ca pyroxene Fs33.3-67.3Wo1.7-9.2, mean Fs59.1±6.9Wo4.0±1.9 (n = 95). High-Ca pyroxene Fs18.6-69.3Wo12.0-44.4, mean Fs34.8±9.9Wo34.9±10.1 (n = 100). Plagioclase An77.3-96.7Or0.0-10.2, mean An92.4±2.9Or1.1±1.5 (n = 86). Chromite Chm55.5-81.4Usp5.6-37.4, mean Chm72.0±8.0Usp17.6±10.3, Cr#87.6 (n=18). Fe/Mn = 32.1.

Classification: Eucrite Polymict

Specimens: 5 individuals including type specimen. Type specimen 22 g with UPlym. Main mass is with main mass holder Gemma Thomas 4 stones: 132, 99, 110, and 150 g

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:Oct 2021
Mass (g):513
Weathering grade:W5
Ferrosilite (mol%):47.0
Wollastonite (mol%):19.0
Classifier:J. Mitchell, F. Wilcocks, N. Stephen, UPlym
Type spec mass (g):22
Type spec location:UoP
Main mass:Gemma Thomas
Finder:Anomynous finder
Comments:Submitted by Gemma Thomas
   and collections
USP: Museu de Geociências - USP Rua do Lago, 562 CEP: 05508-080 Butantã - SP Brazil, Brazil; Website (institutional address; updated 16 Feb 2024)
UPlym: University of Plymouth, United Kingdom; Website (institutional address; updated 29 Oct 2022)
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Christophe PICQ   


     This is the only approved meteorite from Ouargla, Mauritania
     This is 1 of 222 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)

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