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Northwest Africa 14642
Basic information Name: Northwest Africa 14642
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14642
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 15 g
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Lodranite
Recommended:  Lodranite    [explanation]

This is 1 of 93 approved meteorites classified as Lodranite.   [show all]
Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites
Comments: Approved 19 Mar 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14642 (NWA 14642)

Lodranite, (Northwest Africa)

Purchased: 2021 Nov

Classification: Primitive achondrite (Lodranite)

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

Physical characteristics: Small grayish-greenish fragment with minor fusion crust.

Petrography: The meteorite is a breccia composed of up to 5 mm sized mineral clasts with abundant fine-grained cataclastic zones of related material. Predominant minerals are augite, partly exsolved orthopyroxene, and olivine. Augite contains some orthopyroxene-chromite symplectites. Minor phases include chromite, FeS, and kamacite. No feldspar was found in the section studied.

Geochemistry: Ca pyroxene: Fs4.3±0.1Wo43.4±0.5 (Fs4.1-4.5Wo42.6-44.0, FeO/MnO=12±2, n=7); low-Ca pyroxene: Fs9.6±0.2Wo2.1±0.4 (Fs9.4-9.9Wo1.3-2.5, FeO/MnO=18±1, n=7); olivine: Fa10.5±0.2 (Fa10.4-10.7, FeO/MnO=32±2, n=7)

Data from:
  MB111
  Table 0
  Line 0:
State/Prov/County:Lodranite
Place of purchase:Nouadhibou, Mauritania
Date:P 2021 Nov
Mass (g):15
Pieces:1
Class:Lodranite
Shock stage:moderate
Weathering grade:moderate
Fayalite (mol%):10.5
Ferrosilite (mol%):4.3; 9.6
Wollastonite (mol%):43.4; 2.1
Classifier:A. Greshake, MNB
Type spec mass (g):3
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 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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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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