Meteoritical Bulletin: Entry for Northwest Africa 11288

header

MetSoc Home Publications Contacts

Search the Meteoritical Bulletin Database
Last update: 3 Sep 2023
Search for:	Search type:	Search limits:	Display:	Publication:
Names Text Places Classes Years	Contains Starts with Exact Sounds like	NonAntarctic Falls Non-NWAs Has strewnfield		What's new in the last:
Include past classifications in search		Has photo	Limit to approved meteorite names
Search text:

Northwest Africa 11288

Basic information

Name: Northwest Africa 11288
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11288
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass: 407 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	Martian (shergottite)
Recommended:			Martian (shergottite) [explanation]

This is 1 of 298 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all]
Search for other: Martian meteorites

Comments:

Approved 9 Jun 2017

Writeup

help

Writeup from MB 106:

Northwest Africa 11288 (NWA 11288)

(Northwest Africa)

Purchased: 2015 Jan 19

Classification: Martian meteorite (Shergottite)

History: Purchased by Marc Jost Agadir, Morocco, from Aziz Habibi

Physical characteristics: Greenish gray, heterogeneous looking stones (five fragments of 7.14 to 332.5 g) with partially preserved fusion crust.

Petrography: (B. Hofmann, NMBE and Å. Rosén, Bern) The meteorite consists of dominant calcic pyroxene occurring as elongated crystals 2-3 mm in length and maskelynite typically 1-2 mm in size. Rare free silica intergrown with maskelynite. The meteorite shows a high abundance of vesicular glasses, a dark one is shock melt and a lighter one possibly fusion crust intruded into preexisting cavities.

Geochemistry: (Å. Rosén, Bern and B. Hofmann, NMBE) Pyroxene compositions are Fs_36.4±10.9Wo_25.3±8.7(Fs_20.6-65.5Wo_9.2-35.6), mean FeO/MnO = 33.3±5.4 (n=120). Maskelynite has An_50.1±3.7Or_2.3±1.2(An_40.7-54.7Or_1.3-6.2). Dark/green glass has SiO₂ 50.8/49.3, Al₂O₃ 8.06/8.15, CaO 11.5/11.3, MgO 7.7/7.6, FeO 18.1/18.3, MnO 0.48/0.49, Na₂O 1.04/1.53, K₂O 0.18/0.07, TiO₂ 0.88/0.92, Cr₂O₃ 0.16/0.16, FeO/MnO 38.1/37.7 (n= 16/20). Oxygen isotopes: (R. Greenwood, OU) δ¹⁸O=4.932, δ¹⁷O=2.902, Δ¹⁷O= 0.337 (all ‰).

Classification: Based on petrography, mineral compositions (including Fe/Mn-ratios) and oxygen isotopes this is a strongly shocked shergottite.

Specimens: 31.1 g plus one polished thin section at NMBE. Main mass: Marc Jost, SJS.

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Agadir, Morocco
Date:	P 2015 Jan 19
Mass (g):	406.6
Pieces:	5
Class:	Martian (shergottite)
Shock stage:	high
Weathering grade:	low
Ferrosilite (mol%):	36.4±10.9
Wollastonite (mol%):	25.3±8.7
Classifier:	B. Hofmann, NMBE, Å. Rosén, Bern
Type spec mass (g):	31.1
Type spec location:	NMBE
Main mass:	SJS
Comments:	Submitted by Beda Hofmann

Plots:

O isotopes:

Institutions
and collections

NMBE: Natural History Museum Bern Bernastrasse 15 CH-3005 Bern Switzerland, Switzerland; Website (institutional address; updated 2 Mar 2012)
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
Bern: University of Bern, University of Bern, Hochschulstrasse 4, CH-3012 Bern, Switzerland (institutional address)
SJS: Space Jewels Switzerland, 2555 Brügg, Switzerland (private address; updated 3 Jan 2010)

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.

Find references in NASA ADS:
Find references in Google Scholar:

Photos:

Credit	Photos
Photos from the Encyclopedia of Meteorites:
Sergey Vasiliev

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

Direct link to this page