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Northwest Africa 13902
Basic information Name: Northwest Africa 13902
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13902
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 8.74 kg
Classification
  history:
Meteoritical Bulletin:  MB 110  (2022)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 520 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 6 May 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13902 (NWA 13902)

(Northwest Africa)

Purchased: 2020

Classification: HED achondrite (Diogenite)

History: Reportedly found in the border area between Algeria and Mali in July 2020. Purchased from Ali Hnini.

Physical characteristics: Three identically appearing stones (8 kg, 238.4 g, 50 0g) found together. All stones have fusion crust. Saw-cut surfaces reveal coarse dark gray-blue grains set in an orange-brown groundmass.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows fragmental breccia with ~95% orthopyroxene. Accessory phases are troilite, chromite, and iron oxide. No olivine or plagioclase was detected.

Geochemistry: (C. Agee, UNM) Low-Ca pyroxene Fs25.8±1.5Wo1.6±0.2, Fe/Mn=28±1, n=12.

Classification: HED diogenite

Specimens: 22.2 g on deposit at UNM, Matthew Stream holds the 238.4 g and 500 g stones, the main mass is held by a Mauritanian meteorite dealer.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2020
Mass (g):8738
Pieces:3
Class:Diogenite
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):25.8±1.5
Wollastonite (mol%):1.6±0.2
Classifier:C. Agee, UNM
Type spec mass (g):22.2
Type spec location:UNM
Main mass:Ali Hnini
Comments:Field name MAS-6; 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 Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)
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Revision
  history:
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