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Northwest Africa 12202
Basic information Name: Northwest Africa 12202
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12202
Observed fall: No
Year found: 2018
Country: Western Sahara
Mass:help 110 g
Meteoritical Bulletin:  MB 107  (2018)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 364 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 18 Nov 2018
Writeup from MB 107:

Northwest Africa 12202 (NWA 12202)

Western Sahara

Purchased: May 2018

Classification: HED achondrite (Eucrite, polymict)

History: Found in Western Sahara, January 2018. Purchased by Darryl Pitt in Mauritania, May 2018.

Physical characteristics: Single stone, partial dark fusion-crusted exterior. Saw cut reveals a light-gray fragmental breccia.

Petrography: (C. Agee) Microprobe examination of a polished mount shows a fragmental breccia of predominately plagioclase and pyroxene. The pyroxene is mixture of cumulate eucrite compositions with a population of basaltic eucrite compositions leading to the conclusion that there are at least two distinct eucrite lithologies present.

Geochemistry: (C. Agee, UNM) Basaltic eucrite: low Ca pyroxene Fs60.9±1.3Wo3.3±2.2, Fe/Mn= 31±1, n=4; high Ca pyroxene Fs47.9±6.2Wo23.2±2.1, Fe/Mn=31±0, n=3. Cumulate eucrite: low Ca pyroxene Fs35.9±1.9Wo5.0±2.8, Fe/Mn= 29±2, n=4.

Classification: Polymict eucrite

Specimens: 20.4 g including a probe mounts on deposit at UNM, DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P May 2018
Mass (g):110
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):48.3±11.6
Wollastonite (mol%):9.3±9.2
Classifier:C. Agee, UNM
Type spec mass (g):20.4
Type spec location:UNM
Main mass:DPitt
Comments:Field name MVCH-363; submitted by C. Agee, UNM
   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)
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Western Sahara

     This is 1 of 245 approved meteorites from Western Sahara (plus 19 unapproved names)

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