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Northwest Africa 12190
Basic information Name: Northwest Africa 12190
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12190
Observed fall: No
Year found: 2018
Country: Western Sahara
Mass:help 1147 g
Meteoritical Bulletin:  MB 107  (2018)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 425 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 9 Nov 2018
Writeup from MB 107:

Northwest Africa 12190 (NWA 12190)

Western Sahara

Purchased: May 2018

Classification: HED achondrite (Howardite)

History: Found in Gdeim Ashham, Western Sahara, February 2018. Purchased by Darryl Pitt in Mauritania, May 2018.

Physical characteristics: Single stone; sandblasted exterior; saw cut reveals a brecciated interior with numerous feldspar, pyroxene, and lithic clasts; significant domains of recrystallized shock melt are present.

Petrography: (C. Agee, UNM) This meteorite is a polymict breccia consisting of approximately 50% diogenite material and 50% cumulate eucrite material.

Geochemistry: (C. Agee, UNM) Diogenite mineralogy: olivine Fa45.7, Fe/Mn=49, n=1, low-Ca pyroxene 25.4±3.3Wo2.6±1.0, Fe/Mn=30±1, n=5; eucrite mineralogy: low-Ca pyroxene 47.8±4.7Wo8.7±9.0, Fe/Mn=31±1, n=5; plagioclase An92.9±3.4.

Classification: Howardite

Specimens: 25.3 g including a probe mount 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):1146.5
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):45.7
Ferrosilite (mol%):25.4±3.3, 47.8±4.7
Wollastonite (mol%):2.6±1.0, 8.7±9.0
Classifier:C. Agee, UNM
Type spec mass (g):25.3
Type spec location:UNM
Main mass:Darryl Pitt
Comments:Field name MVCH-351; 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 259 approved meteorites from Western Sahara (plus 20 unapproved names)

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