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Northwest Africa 12870
Basic information Name: Northwest Africa 12870
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12870
Observed fall: No
Year found: 2017
Country: Algeria
Mass:help 30.1 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 178 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 21 Sep 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12870 (NWA 12870)

Algeria

Purchased: 2017

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased in 2017 by Daoud Wabich from a seller in Laayoune, Morocco.

Physical characteristics: Single stone lacking fusion crust; composed of white and gray angular clasts set in a dark-gray matrix.

Petrography: (D. Sheikh, FSU) Sample is a feldspathic fragmental breccia composed of olivine, anorthite, augite (some exsolved), pigeonite, orthopyroxene, ilmenite, and Ti-Al-chromite grains (10-80 µm) set in a fine-grained feldspathic matrix. One high-fayalite olivine grain was also observed.

Geochemistry: (D. Sheikh, FSU) Olivine (Fa30.4±9.6, range Fa17.3-46.7, Fe/Mn=95.6, n=30), Fayalite (Fa91.3, Fe/Mn=93, n=1), Augite (Fs17.5±4.8Wo35.3±4.8, range Fs6.8-21.5Wo26.8-44.2, Fe/Mn=50.8, n=15), Pigeonite (Fs33.3±10.7Wo8.0±2.4, range Fs16.9-54.4Wo5.2-15.0, Fe/Mn=58.7, n=20), Orthopyroxene (Fs25.5±8.0Wo3.5±0.7, range Fs16.4-42.1Wo2.6-4.8, Fe/Mn=55.5, n=14), Anorthite (An96.1±0.8, range An93.7-97.9, n=35).

Classification: Lunar (feldspathic fragmental breccia).

Specimens: 6.06 grams at UCLA; main mass with Daoud Wabich.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Laayoune
Date:P 2017
Mass (g):30.07
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):30.4±9.6, 91.3
Ferrosilite (mol%):17.5±4.8, 33.3±10.7, 25.5±8.0
Wollastonite (mol%):35.3±4.8, 8.0±2.4, 3.5±0.7
Classifier:D. Sheikh, FSU
Type spec mass (g):6.06g
Type spec location:UCLA
Main mass:Daoud Wabich
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)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Public domain photographs:
Daniel Sheikh      
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 979 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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