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Northwest Africa 13413
Basic information Name: Northwest Africa 13413
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13413
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 242 g
Classification
  history:
Recommended:  Howardite    [explanation]

This is 1 of 390 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 19 Sep 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13413 (NWA 13413)

(Northwest Africa)

Purchased: 2020

Classification: HED achondrite (Howardite)

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

Physical characteristics: Dark-grayish rock with some fusion crust.

Petrography: The meteorite is a polymict breccia composed of mineral and few basaltic clasts set into a fine-grained clastic matrix. Main minerals are up to 3 mm sized diogenetic orthopyroxene (about 15%), compositionally zoned low-Ca pyroxene, exsolved pyroxene and calcic plagioclase. Minor phases include silica, chromite, ilmenite, FeS, fayalitic olivine, and kamacite.

Geochemistry: Diogenetic pyroxene: Fs24.2±0.5Wo2.0±0.3 (Fs23.3-25.0Wo1.6-2.2, FeO/MnO=24-29, n=12); zoned low-Ca pyroxene: Fs25.2±2.8Wo2.3±0.2 (Fs22.7-29.8Wo2.1-2.8, FeO/MnO=25-31, n=12); eucritic low-Ca pyroxene host crystals to augite lamellae: Fs58.2±0.7Wo3.1±0.4 (Fs57.1-59.7Wo2.7-4.0, FeO/MnO=24-26, n=13); augite exsolution lamellae: Fs24.5±1.9Wo42.7±0.7 (Fs20.1-26.7Wo41.9-44.5, FeO/MnO=322-27, n=14); olivine: Fa38.4±0.2 (Fa38.1-38.6, FeO/MnO=46±1, n=5); calcic plagioclase: An89.5±7.0 (An71.0-94.6, n=14)

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020
Mass (g):242
Pieces:1
Class:Howardite
Shock stage:low
Weathering grade:low
Fayalite (mol%):38.4
Ferrosilite (mol%):24.2; 25.2; 58.2; 24.5
Wollastonite (mol%):2.0; 2.3; 3.1; 42.7
Classifier:A. Greshake, MNB
Type spec mass (g):20.1
Type spec location:MNB
Main mass:Philippe Schmitt-Kopplin
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. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7547 approved meteorites from (Northwest Africa) (plus 1970 unapproved names)

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