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Northwest Africa 14203
Basic information Name: Northwest Africa 14203
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14203
Observed fall: No
Year found: 2018
Country: Algeria
Mass:help 44 g
Classification
  history:
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 288 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 17 Oct 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14203 (NWA 14203)

Algeria

Find: 2018

Classification: Martian meteorite (Shergottite)

History: Purchased by Geologist Juan Avilés Poblador in 2021 from Said Yousfi in Morocco.

Physical characteristics: Single stone with visible fusion crust. A few shock veins are visibly observed and appear to cut across the sample.

Petrography: (D. Sheikh, Cascadia) Sample exhibits a primarily subophitic texture composed of compositionally zoned prismatic and equant pyroxene (Av. 550±100 µm) and elongate maskelynite (800±100 µm). Accessory phases include chlorapatite, ilmenite, titanomagnetite, and pyrrhotite.

Geochemistry: Pigeonite (Fs47.9±16.2 Wo15.3±2.9, range Fs29.5-76.5Wo11.8-21.7, Fe/Mn=33±4, n=10), Augite (Fs31.3±8.3Wo29.0±4.0, range Fs24.0-46.5Wo24.0-34.6, Fe/Mn=31±4, n=10), Plagioclase (An52.1±5.0, range An42.6-58.0, n=14).

Classification: Martian (shergottite, diabasic).

Specimens: 8.8 grams and a thin section at Cascadia; main mass with Juan Avilés Poblador.

Data from:
  MB110
  Table 0
  Line 0:
Date:2018
Mass (g):44
Pieces:1
Class:Martian (shergottite)
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):47.9±16.2, 31.3±8.3
Wollastonite (mol%):15.3±2.9, 29.0±4.0
Classifier:D. Sheikh, Cascadia
Type spec mass (g):8.8
Type spec location:Cascadia
Main mass:Juan Aviles Poblador
Comments:Submitted by Daniel Sheikh
Institutions
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
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
Find references in NASA ADS:
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1250 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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