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Northwest Africa 11481
Basic information Name: Northwest Africa 11481
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11481
Observed fall: No
Year found: 2016
Country: Mauritania
Mass:help 4.04 kg
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 455 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 21 Nov 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11481 (NWA 11481)

Mauritania

Purchased: 2016

Classification: HED achondrite (Diogenite)

History: Purchased in September, 2016 in Mauritania. Recovered in Spring 2016 from the Dayet el Aam area in Mauritania, in the border region with Algeria south of Tindouf.

Physical characteristics: One stone with patches of glossy-black fusion covering 85% of the exterior. Saw cut reveals a fragmental breccia with light-green clasts set in a light gray groundmass.

Petrography: Microprobe examination of a polished mount shows numerous pyroxene fragments. Ubiquitous troilite and chromite were observed. Plagioclase, silica, olivine and metal not detected.

Geochemistry: (C. Agee, UNM) low-Ca pyroxene Fs24.3±9.5Wo3.5±1.4, Fe/Mn=28±2, n=11; high-Ca pyroxene Fs48.7±3.7Wo20.5±11.1, Fe/Mn=30±2, n=3.

Classification: Diogenite

Specimens: 32.8 g including a probe mounts on deposit at UNM, DPitt holds the main mass.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2016
Mass (g):4039.7
Pieces:1
Class:Diogenite
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):24.3±9.5
Wollastonite (mol%):3.5±1.4
Classifier:C. Agee, UNM
Type spec mass (g):32.4
Type spec location:UNM
Main mass:Darryl Pitt
Comments:Field name MVCH148; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
Catalogs:
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Geography:

Mauritania
Coordinates:Unknown.

Statistics:
     This is 1 of 141 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)

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