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Northwest Africa 13459
Basic information Name: Northwest Africa 13459
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13459
Observed fall: No
Year found: 2017
Country: Morocco
Mass:help 32.5 g
Classification
  history:
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 254 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 2 Nov 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13459 (NWA 13459)

South, Morocco

Find: 2017

Classification: Martian meteorite (Shergottite)

History: The meteorite was purchased in Tucson, USA, by Zhouping Guo.

Physical characteristics: The meteorite is irregular in shape. Most of the surface of the meteorite is covered with black fusion crust. The interior is grayish brown with clear, glassy maskelynite grains, and sporadically-distributed dark glass shock pockets.

Petrography: Petrology (Z.Xia, B.Miao, Q.Deng, GUT): The meteorite has a fine-grained basaltic texture, which is mainly composed of pyroxene and maskelynite. The accessory minerals are chromite, Fe-Ti oxide, troilite, vesicular glass and phosphate. Pyroxene is an idiomorphic crystal in the form of prisms, which is composed of highly fractured pigeonite and augite, with a particle size of 0.2-2mm, and obvious chemical zoning can be observed. The maskelynite is relatively broken. Plagioclase is completely transformed into maskelynite.

Geochemistry (Z.Xia, B.Miao, Q.Deng, GUT): Pyroxenes show two compositional trends: pigeonite (En27.5-58.7Fs29.6-59.0Wo9.2-13.6, average En43.3Fs44.6Wo12.1, FeO/MnO=35.3; 4.6, n=6) and augite (En28.0-45.0Fs22.8-55.4Wo16.6-33.3; average En38.7Fs33.7Wo27.6; FeO/MnO=31.6-3.7, n=4). Maskelynite (An42.3-48.0Ab50.0-54.7Or1.8-3.0, average An46.1Ab51.7Or2.2, n=5).

Classification: Martian (basaltic shergottite)

Specimens: A polished section and about 6.5 g sample are stored in the Institution of Meteorites and Planetary Materials Research of GUT, the main mass is exhibited in the Geological Museum of Guilin.

Data from:
  MB109
  Table 0
  Line 0:
State/Prov/County:South
Place of purchase:Tucson, USA
Date:2017
Mass (g):32.51
Pieces:1
Class:Martian (shergottite)
Classifier:Z.Xia, B.Miao. H.Chen, GUT
Type spec mass (g):6.5
Type spec location:GUT
Main mass:GUT
Finder:Anonymously
Comments:Submitted by Bingkui Miao
Institutions
   and collections
GUT: College of Earth Sciences, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China (institutional address; updated 18 Oct 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Public domain photographs:
Bingkui Miao      
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 19 approved meteorites from South, Morocco
     This is 1 of 1632 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater)

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