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Northwest Africa 10438
Basic information Name: Northwest Africa 10438
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10438
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 2.86 kg
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  Eucrite-unbr
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 90 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 26 Dec 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 10438 (NWA 10438)

(Northwest Africa)

Purchased: May 2015

Classification: HED achondrite (Eucrite, unbrecciated)

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 (consisting of 4 broken pieces that fit together), weathered exterior. A saw cuts reveal a light-colored mix of millimeter-sized plagioclase and pyroxene crystals, some weathering veins present.

Petrography: (C. Agee, UNM) This meteorite consists of ~60% pyroxene and ~35% plagioclase. Many pyroxene grains show fine exsolution lamellae. Troilite, Ti-chromite, ilmenite and silica observed.

Geochemistry: (C. Agee and N. Muttik, UNM) Pigeonite Fs61.1±0.3Wo6.6±0.2, Fe/Mn=29±1, n=4; augite Fs32.1±0.6Wo40.4±0.4, Fe/Mn=29±0, n=3.

Classification: Unbrecciated eucrite. Equilibrated, clear compositional separation of pigeonite and augite.

Specimens: 28.95 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Northwest Africa
Date:P May 2015
Mass (g):2862.63
Pieces:4
Class:Eucrite-unbr
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):61.1±0.3, 32.1±0.6
Wollastonite (mol%):6.6±0.2, 40.4±0.4
Classifier:C. Agee, UNM
Type spec mass (g):28.95
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G609; 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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
John Tanner   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6781 approved meteorites from (Northwest Africa) (plus 2061 unapproved names)

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