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Northwest Africa 11073
Basic information Name: Northwest Africa 11073
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11073
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 248 g
Meteoritical Bulletin:  MB 106  (2018)  Martian (shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 300 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 17 Feb 2017
Writeup from MB 106:

Northwest Africa 11073 (NWA 11073)

(Northwest Africa)

Purchased: 2016 Nov

Classification: Martian meteorite (Shergottite)

History: Two stones found together near the Algeria-Mali border were purchased by Darryl Pitt in November 2016 from a dealer in Mauritania.

Petrography: (A. Irving and S. Kuehner, UWS) Medium-grained igneous assemblage of predominantly zoned clinopyroxene (pigeonite plus subcalcic augite) and maskelynite with accessory pyrrhotite, ulvöspinel, ilmenite, baddeleyite, merrillite, chlorapatite and K-Si-Al-bearing glass. Sparse pockets and thin veinlets of shock-produced vesicular glass (deep brown in thin section) are present.

Geochemistry: Pigeonite (Fs40.2-58.1Wo13.8-15.7, FeO/MnO = 29-35, N = 4), subcalcic augite (Fs21.9-47.8Wo36.5-26.7, FeO/MnO = 28-34, N = 4), maskelynite (An46.6-47.8Or2.7-2.0, N = 2).

Classification: Martian meteorite (shergottite, aphyric, diabasic).

Specimens: 22.4 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2016 Nov
Mass (g):247.7
Class:Martian (shergottite)
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):40.2-58.1; 21.9-47.8
Wollastonite (mol%):13.8-15.7; 36.5-26.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22.4
Type spec location:UWB
Main mass:DPitt
Comments:MVCH 217; submitted by A. Irving
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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     This is 1 of 9368 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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