header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 18 Sep 2021
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 13460
Basic information Name: Northwest Africa 13460
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13460
Observed fall: No
Year found: 2017
Country: Morocco
Mass:help 4.01 g
Classification
  history:
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 260 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 13460 (NWA 13460)

South, Morocco

Find: 2017

Classification: Martian meteorite (Shergottite)

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

Physical characteristics: The shape of the meteorite is irregular. There is black fusion crust partly covering its surface. The interior is generally grey. Glassy maskelynite and a small amount of black glass pockets can be observed.

Petrography: Petrology (Z.Xia, B.Miao, Q.Deng, GUT):The meteorite has a diabasic structure, which is mainly composed of pigeonite(~50 vol%), augite(~15 vol%), maskelynite(~25 vol%) and accessory minerals(~10 vol%). The accessory minerals are mainly composed of chromite, Fe-Ti oxide, troilite, vesicular glass and phosphate. Pigeonite and augite (typical size 0.1-1.6mm) are automorphic in the form of slab columns, and obvious component zoning can be observed. The meteorite experienced a strong impact metamorphism, which caused the plagioclases to be completely transformed into maskelynites, and pyroxenes and maskelynites were relatively broken.

Geochemistry (Z.Xia, B.Miao, Q.Deng, GUT): Pyroxenes show two compositional trends: pigeonite (En31.2-55.7Fs32.2-55.8Wo10.2-14.3, average En42.9Fs44.5Wo12.6, FeO/MnO=34.2-4.4, n=9) and augite (En23.6-45.8Fs26.6-60.5Wo15.8-31.7, average En34.5Fs40.9Wo24.6;FeO/MnO=32.0-3.3, n=5). Maskelynite (An39.8-45.8Ab51.2-55.7Or2.7-4.6, average An43.2Ab53.4Or3.4, n=9).

Classification: Martian (basaltic shergottite)

Specimens: A polished section and 1.78 g sample are stored in the Institution of Meteorites and Planetary Materials Research of GUT.

Data from:
  MB109
  Table 0
  Line 0:
State/Prov/County:South
Place of purchase:Tucson, USA
Date:2017
Mass (g):4.01
Pieces:1
Class:Martian (shergottite)
Classifier:Z.Xia, B.Miao. H.Chen, GUT
Type spec mass (g):4.01
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 21 approved meteorites from South, Morocco
     This is 1 of 1670 approved meteorites from Morocco (plus 23 unapproved names) (plus 1 impact crater)

Direct link to this page