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Northwest Africa 13215
Basic information Name: Northwest Africa 13215
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13215
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 150 g
Classification
  history:
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 225 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 5 Apr 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13215 (NWA 13215)

(Northwest Africa)

Purchased: 2019

Classification: Martian meteorite (Shergottite)

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

Physical characteristics: Dark-grayish rock largely covered with fusion crust.

Petrography: The meteorite displays a fresh grayish interior with a coarse-grained basaltic texture predominantly composed of up to 3 mm sized pyroxene and plagioclase grains. Pyroxene is intensely fractured pigeonite and augite showing patchy compositional zoning. Minor phases are merrillite, ilmenite, pyrrhotite, and some Si-rich mesostasis. The meteorite is highly shocked, i.e., plagioclase is completely transformed into maskelynite and black shock melt pockets and shock veins are abundant.

Geochemistry: pigeonite: Fs54.7±16.3Wo16.8±1.1 (Fs31.2-69.3Wo15.2-18.2, n=6, FeO/MnO=26-35); augite: Fs45.4±13.7Wo25.4±4.2 (Fs27.3-68.9Wo20.3-34.1, n=12, FeO/MnO=26-36); maskelynite: An56.0±1.9Ab43.9±1.9Or0.1±0.0, n=17

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Laayoune, Morocco
Date:P 2019
Mass (g):150
Pieces:1
Class:Martian (shergottite)
Shock stage:strong
Weathering grade:low
Ferrosilite (mol%):54.7; 45.4
Wollastonite (mol%):16.8; 25.4
Classifier:A. Greshake, MNB
Type spec mass (g):22.8
Type spec location:MNB
Main mass:Larbi Chnaoui
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)
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Photos:
CreditPhotos
Public domain photographs:
Ansgar Greshake      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7328 approved meteorites from (Northwest Africa) (plus 1973 unapproved names)

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