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Northwest Africa 14981
Basic information Name: Northwest Africa 14981
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14981
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 880 g
Classification
  history:
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 373 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 20 Jun 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14981 (NWA 14981)

(Northwest Africa)

Purchased: 2021 Nov

Classification: HED achondrite (Eucrite, polymict)

History: The meteorite was purchased from a meteorite dealer in Morocco.

Physical characteristics: Grayish rock almost completely covered with fusion crust.

Petrography: The meteorite displays a fresh grayish interior and is polymict breccia composed of up to 2 cm sized lithic and up to 1.5 mm sized mineral fragments set in fine-grained clastic matrix. Lithic clasts include basaltic and impact melt fragments. Mineral phases are predominantly exsolved pyroxene, diognetic low-Ca pyroxene (about 3 vol%), and calcic plagioclase grains. Minor phases include fayalite, silica, ilmenite, Ti-bearing chromite, zircon, troilite, and rare metallic iron. Some slices contain black carbonaceous chondrite clasts and a rare mesosiderate-like fragment.

Geochemistry: Eucrite: low-Ca pyroxene host to exsolution lamellae: Fs62.6±2.0Wo2.2±0.8 (Fs60.1-65.7Wo1.8-4.1, FeO/MnO=29-32, n=7); Ca-pyroxene exsolution lamellae: Fs27.9±0.3Wo43.0±0.3 (Fs27.5-28.4Wo42.5-43.4, FeO/MnO=29-34, n=7); diogenetic pyroxene: Fs27.0±0.3Wo2.9±0.1 (Fs26.7-27.3Wo2.8-3.0, FeO/MnO=29-30, n=7); more ferroan low-Ca-pyroxene: Fs37.0±0.3Wo2.6±0.5 (Fs36.6-37.3Wo1.9-3.1, FeO/MnO=29-32, n=7); olivine: Fa84.6±0.2, FeO/MnO=37±1, n=5); calcic plagioclase: An90.4±2.5 (An84.5-92.3, n=7).

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021 Nov
Mass (g):880
Pieces:1
Class:Eucrite-pmict
Shock stage:low
Weathering grade:low
Fayalite (mol%):84.6
Ferrosilite (mol%):62.6; 27.9; 27.0; 37.0
Wollastonite (mol%):2.2; 43.0; 2.9; 2.6
Classifier:A. Greshake, MNB
Type spec mass (g):36.8
Type spec location:MNB
Main mass:David Göttlich
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. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

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

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