Meteoritical Bulletin: Entry for Northwest Africa 11746

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Northwest Africa 11746

Basic information

Name: Northwest Africa 11746
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11746
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass: 9.4 g

Classification
history:

Meteoritical Bulletin:	MB 107	(2018)	Martian (shergottite)
Recommended:			Martian (shergottite) [explanation]

This is 1 of 321 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all]
Search for other: Martian meteorites

Comments:

Approved 7 Apr 2018

Writeup

Writeup from MB 107:

Northwest Africa 11746 (NWA 11746)

(Northwest Africa)

Purchased: 2015

Classification: Martian meteorite (Shergottite)

History: Purchased by Jay Piatek from Morocco, 2015.

Physical characteristics: Fusion crusted individual. A saw-cut surface reveals gray-green, fine-grained, basaltic texture.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows an ophitic texture with ~60% zoned pyroxene and ~30% maskelynite. Accessory phases include titanomagnetite, ilmenite, Fe-sulfide, and silica.

Geochemistry: (C. Agee, UNM) Pigeonite Fs_50.5±14.8Wo_16.9±6.8, Fe/Mn=37±3, n=8; augite Fs_29.3±10.4Wo_31.7±2.8, Fe/Mn=32±4, n=12; maskelynite Or_2.8±1.1Ab_49.8±3.9An_47.4±4.9, n=6.

Classification: Martian (shergottite), pyroxene-phyric. Possibly paired with NWA 10016.

Specimens: 1.9 g including a probe mount on deposit at UNM, Jay Piatek holds the main mass.

Data from:
  MB107
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2015
Mass (g):	9.4
Pieces:	1
Class:	Martian (shergottite)
Shock stage:	High
Weathering grade:	Low
Ferrosilite (mol%):	50.5±14.8, 29.3±10.4
Wollastonite (mol%):	16.9±6.8, 31.7±2.8
Classifier:	C. Agee, UNM
Type spec mass (g):	1.9
Type spec location:	UNM
Main mass:	Jay Piatek
Comments:	Fieldname JP-24; submitted by C. Agee

Institutions
and collections

UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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Revision
history:

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