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Northwest Africa 14129
Basic information Name: Northwest Africa 14129
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14129
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 382 g
Classification
  history:
Recommended:  Diogenite-melt breccia    [explanation]

This is 1 of 4 approved meteorites classified as Diogenite-melt breccia.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 23 Aug 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14129 (NWA 14129)

(Northwest Africa)

Purchased: 2021 May

Classification: HED achondrite (Diogenite, melt breccia)

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania, in May, 2021.

Physical characteristics: Dark-brownish fragment without fusion crust.

Petrography: Melt breccia predominantly consisting of up to 300 µm sized, weakly zoned orthopyroxene, about 20-µm sized zoned olivine, and rare up to 100-µm sized calcic plagioclase crystals set in a matrix dominated by acicular pyroxene grains showing igneous zoning with orthopyroxene cores and pigeonitic rims. Several diogenitic pyroxenes served as nucleation sites and are overgrown by orthopyroxene and pigeonite. Minor phases are chromite and FeS. No metallic iron has been found. Eucritic material is absent in the section studied. The meteorite is strongly weathered and contains abundant calcite filled cavities and barite.

Geochemistry: Orthopyroxene pyroxene: Fs28.6±1.4Wo2.4±0.1 (Fs25.5-29.8Wo2.3-2.7, FeO/MnO=28-32, n=15); acicular matrix pyroxene: Fs27.5±10.6Wo6.0±4.8 (Fs14.6-38.3Wo1.4-14.9, FeO/MnO=24-31, n=7); olivine: Fa31.5±4.0 (Fa24.3-39.3, FeO/MnO=46±2, n=12); calcic plagioclase: An92.4±0.5 (An91.6-93.0, n=4)

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P 2021 May
Mass (g):382
Pieces:1
Class:Diogenite-melt breccia
Shock stage:high
Weathering grade:high
Fayalite (mol%):31.5
Ferrosilite (mol%):28.6; 27.5
Wollastonite (mol%):2.4; 6.0
Classifier:A. Greshake, MNB
Type spec mass (g):27.5
Type spec location:MNB
Main mass:Salamu Ali
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Robert Smart   
Ryan Upchurch   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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