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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 281 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 Meteoritical Bulletin, no. 110, in preparation (2021)
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1208 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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