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Northwest Africa 10439
Basic information Name: Northwest Africa 10439
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10439
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 176.2 g
Meteoritical Bulletin:  MB 104  (2015)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 452 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 26 Dec 2015
Writeup from MB 104:

Northwest Africa 10439 (NWA 10439)

(Northwest Africa)

Purchased: April 2015

Classification: HED achondrite (Howardite)

History: Purchased by team eegooblago (Brahim Tahiri, Dustin Dickens and Sean Tutorow) while on expedition in Northwest Africa and Western Sahara in April and May 2015.

Physical characteristics: Single stone, weathered exterior. A saw cuts reveal plagioclase and pyroxene clasts up to 3 mm set in a light gray groundmass.

Petrography: (C. Agee, UNM) This is a fragmental, polymict breccia consisting of approximately 40% diogenite and 60% eucrite lithologies, based on pyroxene compositions. Troilite, chromite, ilmenite and silica observed.

Geochemistry: (C. Agee and N. Muttik, UNM) Diogenite low-Ca pyroxene Fs31.1±3.8Wo3.7±1.5, Fe/Mn=30±1, n=6; cumulate eucrite low-Ca pyroxene Fs40.2±1.1Wo4.7±4.9, Fe/Mn=29±4, n=2; basaltic eucrite low-Ca pyroxene Fs56.8±2.0Wo4.7±2.1, Fe/Mn=31±1, n=6; basaltic eucrite high-Ca pyroxene Fs25.2±2.9Wo42.5±0.7, Fe/Mn=30±2, n=2; plagioclase An88.8±2.0, n=3.

Classification: Howardite

Specimens: 20.16 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Northwest Africa
Date:P April 2015
Mass (g):176.19
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):31.1±3.8, 40.2±1.1, 56.8±2.0
Wollastonite (mol%):3.7±1.5, 4.7±4.9, 4.7±2.1
Classifier:C. Agee, UNM
Type spec mass (g):20.16
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G610; submitted by C. Agee, UNM
   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)
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Leandro Macedo Bonfim   
Mike Markowitz   

     This is 1 of 9776 approved meteorites from (Northwest Africa) (plus 1862 unapproved names)

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