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Northwest Africa 13634
Basic information Name: Northwest Africa 13634
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13634
Observed fall: No
Year found: 2017
Country: Morocco
Mass:help 134.9 g
Classification
  history:
Recommended:  Howardite    [explanation]

This is 1 of 399 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 16 Dec 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13634 (NWA 13634)

Morocco

Purchased: 2017

Classification: HED achondrite (Howardite)

History: Purchased from AJ meteorites, found June 2017, Morocco.

Physical characteristics: Single stone partially covered in weathered fusion crust. A saw cut reveals a breccia with light and dark clasts set in a light-tan matrix.

Petrography: (C. Agee, UNM) This meteorite is a polymict breccia consisting of approximately 55% diogenite and 45% eucrite clasts. Accessory opaques, fayalitic olivine, and silica observed.

Geochemistry: (C. Agee, UNM) Diogenite low-Ca pyroxene Fs27.1±3.1Wo3.1±0.4, Fe/Mn=28±2, n=11; eucrite low-Ca pyroxene Fs53.4±6.4Wo5.6±3.4, Fe/Mn=31±2, n=9; plagioclase An90.2±2.7, n=7.

Classification: Howardite

Specimens: 20.1 g on deposit at UNM, Simon de Boer holds the main mass.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2017
Mass (g):134.86
Pieces:1
Class:Howardite
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):88.4
Ferrosilite (mol%):27.1±3.1; 53.4±6.4
Wollastonite (mol%):3.1±0.4; 5.6±3.4
Classifier:C. Agee, UNM
Type spec mass (g):20.1
Type spec location:UNM
Main mass:Simon de Boer
Comments:Field name SB2; submitted by C. Agee, UNM
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1670 approved meteorites from Morocco (plus 23 unapproved names) (plus 1 impact crater)

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