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Northwest Africa 8728
Basic information Name: Northwest Africa 8728
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8728
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 557 g
Meteoritical Bulletin:  MB 104  (2015)  Lodranite
Recommended:  Lodranite    [explanation]

This is 1 of 91 approved meteorites classified as Lodranite.   [show all]
Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites
Comments: Approved 4 Feb 2015
Writeup from MB 104:

Northwest Africa 8728 (NWA 8728)

(Northwest Africa)

Found: 2014

Classification: Primitive achondrite (Lodranite)

History: Recovered in April 2014 near the borders of Mauritania, Western Sahara and Algeria. Purchased in Mauritania in June 2014.

Physical characteristics: Single stone, weathered exterior. A saw cut reveals coarse-grains (up to 5 mm) of green chrome diopside, orange to dark-red grains also present, some metal grains up to 3 mm.

Petrography: (C. Agee, UNM) Microprobe examination of the deposit sample, shows a breccia with fragmental olivine and pyroxene grains, some mm-size. Accessory phases include Fe-Ni metal, iron oxide, troilite, and chromite. No plagioclase present.

Geochemistry: (C. Agee and N. Muttik, UNM). olivine Fa11.2±0.1, Fe/Mn=36±2, n=12; low-Ca pyroxene Fs10.2±0.2Wo2.3±0.7, Fe/Mn=21±1, n=4; diopside Fs4.4±0.2Wo44.4±0.5, Fe/Mn=14±2, Cr2O3=0.93±0.23 (wt%), n=6.

Classification: Primitive achondrite (lodranite), moderate weathering grade, high shock stage.

Specimens: A total of 21.2 g including a probe mount on deposit at UNM. DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Mass (g):556.5
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):11.2±0.1
Ferrosilite (mol%):10.2±0.2
Wollastonite (mol%):2.3±0.7
Classifier:C. Agee, UNM
Type spec mass (g):21.2
Type spec location:UNM
Main mass:Darryl Pitt
Comments:Field name MAC 80; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
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 9368 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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