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Northwest Africa 13944
Basic information Name: Northwest Africa 13944
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13944
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 226 g
Classification
  history:
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 355 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 6 May 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13944 (NWA 13944)

(Northwest Africa)

Purchased: December, 2020

Classification: HED achondrite (Eucrite, polymict)

History: The meteorite was found 2019 in the Adrar region, Algeria, initially purchased by Mr. Adrián Contreras Gómez from a local meteorite dealer in Tindouf, Algeria, and finally bought by the main mass holder in December, 2020.

Physical characteristics: Light grayish rock without fusion crust.

Petrography: The meteorite is a fragmental breccia composed of lithic and mineral clasts set in a more fine-grained clastic matrix. Lithic clasts include up to 5 mm sized basaltic and black impact melt fragments. Mineral phases are predominantly up to 700 µm sized exsolved pyroxene, compositionally homogeneous low-Ca pyroxene, and calcic plagioclase grains. Minor phases include silica, chromite, ilmenite, troilite, fayalite, and metallic iron.

Geochemistry: large low-Ca-pyroxene: Fs36.9±0.5Wo3.4±0.8 (Fs36.4-38.0Wo2.5-5.2, FeO/MnO=26-32, n=11); low-Ca pyroxene host to augite exsolution lamellae: Fs59.5±1.0Wo3.4±1.2 (Fs57.3-60.5Wo2.2-6.0, FeO/MnO=28-31, n=9); Ca-pyroxene exsolution lamellae: Fs25.1±0.2Wo42.0±0.2 (Fs24.8-25.4Wo41.6-42.3, FeO/MnO=26-32, n=10); calcic plagioclase: An90.4±0.5 (An89.6-91.2, n=12)

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Fürstenberg, Germany
Date:P December, 2020
Mass (g):226
Pieces:1
Class:Eucrite-pmict
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):39.9; 59.5; 25.1
Wollastonite (mol%):3.4; 3.4; 42.0
Classifier:A. Greshake, MNB
Type spec mass (g):28.9
Type spec location:MNB
Main mass:Dirk Lorenzen
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:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7752 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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