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Northwest Africa 10440
Basic information Name: Northwest Africa 10440
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10440
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 104.4 g
Meteoritical Bulletin:  MB 104  (2015)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 398 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 10440 (NWA 10440)

(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, fusion crust. A saw cuts reveal dark gray and green clasts up to 3 mm set in a light gray groundmass.

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

Geochemistry: (C. Agee and N. Muttik, UNM) Diogenite low-Ca pyroxene Fs27.±4.2Wo3.7±2.9, Fe/Mn=29±3, n=7; eucrite pigeonite Fs54.4±3.7Wo10.8±7.2, Fe/Mn=33±1, n=4; plagioclase An75.6±14.0, n=3; olivine Fa 37.1, Fe/Mn=51, n=1.

Classification: Howardite

Specimens: 20.8 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):104.36
Shock stage:high
Weathering grade:low
Fayalite (mol%):37.1
Ferrosilite (mol%):27.±4.2, 54.4±3.7
Wollastonite (mol%):3.7±2.9, 10.8±7.2
Classifier:C. Agee, UNM
Type spec mass (g):20.8
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G611; 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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     This is 1 of 7820 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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