Meteoritical Bulletin: Entry for Northwest Africa 15196

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Northwest Africa 15196

Basic information

Name: Northwest Africa 15196
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15196
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass: 113 g

Classification
history:

Recommended:

Martian (shergottite) [explanation]

This is 1 of 293 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all]
Search for other: Martian meteorites

Comments:

Approved 5 Sep 2022

Writeup

help

Writeup from MB 111:

Northwest Africa 15196 (NWA 15196)

(Northwest Africa)

Purchased: May, 2022

Classification: Martian meteorite (Shergottite)

History: The meteorite was purchased from a meteorite dealer in Temara, Morocco.

Physical characteristics: Dark grayish to greenish rock without fusion crust.

Petrography: Sub-ophitic textured meteorite predominantly composed of up to 2 mm sized prismatic, irregularly zoned pyroxene and lath-shaped maskelynite grains showing preferred orientation. Minor phases include exsolved ilmenite, troilite, and apatite. Myrmekitic intergrowths of fayalite, hedenbergite, and silica are abundant. The meteorite is highly shocked and contains shock melt pockets. Cracks are often filled with secondary calcite.

Geochemistry: complex zoned pyroxene: Fs_48.9±17.9Wo_19.6±5.1(Fs_29.0-77.4Wo_13.5-29.2, FeO/MnO=33±4, n=15); maskelynite: An_55.2±1.3Ab_43.6±1.4Or_1.2±0.4(An_52.2-56.8Ab_41.2-46.4Or_0.7-2.0, n=10); fayalite: Fa_97.9±0.1, FeO/MnO=44±1, n=3

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Temara, Morocco
Date:	P May, 2022
Mass (g):	113
Pieces:	1
Class:	Martian (shergottite)
Shock stage:	high
Weathering grade:	moderate
Fayalite (mol%):	97.9
Ferrosilite (mol%):	48.9
Wollastonite (mol%):	19.6
Classifier:	A. Greshake, MNB
Type spec mass (g):	20
Type spec location:	MNB
Main mass:	Said Yousfi
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 111, in preparation (2022)

Find references in NASA ADS:
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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Said Yousfi

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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