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Northwest Africa 16454
Basic information Name: Northwest Africa 16454
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16454
Observed fall: No
Year found: 2023
Country: Morocco
Mass:help 351 g
Classification
  history:
Recommended:  Ureilite-pmict    [explanation]

This is 1 of 35 approved meteorites classified as Ureilite-pmict.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 21 May 2024
Writeuphelp
Writeup from MB 113:

Northwest Africa 16454 (NWA 16454)

Morocco

Purchased: 2023 Jun

Classification: Ureilite (polymict)

Petrography: (J. Gattacceca, CEREGE) Breccia with mineral clasts up to mm. The few lithic clasts show an equilibrated texture with poikilitic texture. Main minerals are olivine (with reduced rims), pigeonite, augite, plagioclase. Aggregates of carbon material (likely diamond in view of the extreme difficulty to cut and polish the meteorite) reach 1 mm in size and display geometric shapes. C1-like clasts to 500 µm are present.

Geochemistry: Olivine Fa22.4±1.0, Cr2O3 0.85±0.08 wt%, CaO 0.40±0.09 wt% (n=5). Olivine rims down to Fa9.4. Pigeonite Fs13.1Wo8.2 (n=2), augite Fs6.7±0.4Wo37.5±1.7 (n=3). Pyroxenes have FeO/MnO 16.0±6.9, Cr2O3 1.20±0.15 wt%; Al2O3 1.50±0.75 (n=5). Plagioclase An40.4Ab59.2Or0.4 (n=2).

Classification: Ureilite, polymict.

Specimens: Type specimen at CEREGE, main mass with Kuntz.

Data from:
  MB113
  Table 0
  Line 0:
Date:P 2023 Jun
Mass (g):351
Pieces:1
Class:Ureilite-pmict
Weathering grade:moderate
Magnetic suscept.:4.08
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):20.89
Type spec location:CEREGE
Main mass:Kuntz
Finder:anonymous
Comments:work name K570; submitted by Jerome Gattacceca
Institutions
   and collections		 CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 10 Jun 2023)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 113, in preparation (2024)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2163 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater)

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