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Northwest Africa 11311
Basic information Name: Northwest Africa 11311
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11311
Observed fall: No
Year found: 2016
Country: Algeria
Mass:help 180 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 400 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 28 Jun 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11311 (NWA 11311)

Algeria

Purchased: 2016

Classification: HED achondrite (Howardite)

History: One piece with a total mass of 180 g was purchased by S. Decker 2016 from a Moroccan dealer. Based on the information from the dealer the sample was found in Algeria.

Petrography: (A. Bischoff, IfP) This meteorite is a polymict breccia consisting of ~85% diogenitic material and ~15% eucritic lithologies. Most plagioclase has been transformed to maskelynite. Chromite, ilmenite, kamacite, and a SiO2-phase were also found.

Geochemistry: (M. Patzek, A. Bischoff, IfP) Diogenitic low-Ca pyroxene Fs27.3±3.9Wo2.9±1.6, n=6; eucrite low Ca pyroxene Fs52.8±6.6Wo5.7±1.4, n=6. FeO/MnO=33±5, n=12. Eucrite high-Ca pyroxene: Fs28.7Wo40.5 and Fs28.0Wo41.7; n=2; plagioclase: An83.5Ab15.8Or0.6.

Classification: HED achondrite (howardite)

Specimens: Specimen: 20.0 g and one polished thin section are at IfP

Data from:
  MB106
  Table 0
  Line 0:
Origin or pseudonym:Desert
Place of purchase:Morroco
Date:P 2016
Mass (g):180
Pieces:1
Class:Howardite
Shock stage:high
Weathering grade:moderate
Classifier:M. Patzek, A. Bischoff. IfP
Type spec mass (g):20.0
Type spec location:IfP
Main mass:S. Decker (Meteorite-Museum, 55430 Oberwesel, Germany) holds the main mass.
Comments:Submitted by Ebert S.
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
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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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1136 approved meteorites from Algeria (plus 27 unapproved names) (plus 4 impact craters)

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