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Northwest Africa 12203 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12203 This is an OFFICIAL meteorite name. Abbreviation: NWA 12203 Observed fall: No Year found: 2018 Country: Algeria Mass: 293 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 451 approved meteorites classified as Howardite. [show all] Search for other: Achondrites, HED achondrites, and Howardites | ||||||||||||||||||||||||||||
Comments: | Approved 9 Nov 2018 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 12203 (NWA 12203) Algeria Purchased: May 2018 Classification: HED achondrite (Howardite) History: Found near Oum El Assel, Algeria, March 2018. Purchased by Darryl Pitt in Mauritania, May 2018. Physical characteristics: Single stone, with weathered exterior. A saw cut reveals a very dark gray surface with faint appearing clasts and mineral fragments. Petrography: (C. Agee) Microprobe examination of a polished mount shows a fragmental breccia of pyroxene, plagioclase, and lithic clasts. The meteorite consists of approximately 50% diogenite and 50% eucrite. Geochemistry: (C. Agee, UNM) Diogenite pyroxene Fs28.1±2.5Wo2.6±1.0, Fe/Mn=29±2, n=7; eucrite pigeonite Fs47.5±5.9Wo6.7±3.1, Fe/Mn=30±2, n=6, eucrite high-Ca pyroxene Fs29.3±2.6Wo39.1±1.9, Fe/Mn=30±2, n=2, plagioclase An88.7±5.6, n=5. Classification: Howardite Specimens: 23.3 g including a probe mounts on deposit at UNM, DPitt holds the main mass. | ||||||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
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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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Geography: |
Statistics: This is 1 of 1344 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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