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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: 2018
Country: (Northwest Africa)
Mass:help 8.74 kg
Classification
  history:
Recommended:  Diogenite    [explanation]

This is 1 of 464 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: 2018

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 2018
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 Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7820 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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