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Northwest Africa 12985
Basic information Name: Northwest Africa 12985
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12985
Observed fall: No
Year found: 2016
Country: Algeria
Mass:help 33 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 184 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 23 Dec 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12985 (NWA 12985)

Algeria

Find: 2016

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased in 2019 by Matthew Stream from a seller in Algeria.

Physical characteristics: Single stone with absent fusion crust. A slice of the interior reveals an assortment of light and dark-colored clasts.

Petrography: (Daniel Sheikh, FSU) Sample is a feldspathic fragmental breccia composed predominantly of angular anorthitic clasts (<2mm) containing minor amounts of olivine, pigeonite, augite, ilmenite, and chromite.

Geochemistry: (Daniel Sheikh, FSU) Olivine (Fa29.4±10.4, range Fa18.7-44.6, Fe/Mn=89±10, n=3), pigeonite (Fs36.5±7.6Wo14.1±4.0, range Fs31.8-50.2Wo10.7-20.9, Fe/Mn=51±7, n=5), wugite (Fs11.7Wo42.0, Fe/Mn=38, n=1), anorthite (An96.4±1.1, range An93.8-98.4, n=33).

Classification: Lunar (feldspathic fragmental breccia).

Specimens: 6.7 grams at UCLA; main mass with Matthew Stream.

Data from:
  MB108
  Table 0
  Line 0:
Date:2016
Mass (g):33
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):29.4±10.4
Ferrosilite (mol%):36.5±7.6, 11.7
Wollastonite (mol%):14.1±4.0, 42.0
Classifier:D. Sheikh, FSU
Type spec mass (g):6.7
Type spec location:UCLA
Main mass:Matthew Stream
Comments:Submitted by Daniel Sheikh
Institutions
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
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Photos:
CreditPhotos
Public domain photographs:
Daniel Sheikh   
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 983 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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