header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 11 Oct 2019
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 11588
Basic information Name: Northwest Africa 11588
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11588
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 10.3 g
Classification
  history:
Recommended:  CM2    [explanation]

This is 1 of 532 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Comments: Approved 3 Feb 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11588 (NWA 11588)

(Northwest Africa)

Purchased: 2017

Classification: Carbonaceous chondrite (CM2)

Physical characteristics: Dark-brown fragments. Cut surface reveals a dark interior with abundant matrix and small chondrules.

Petrography: (J. Gattacceca, H. Pourkhorsandi, CEREGE; L. Bonal, IPAG) Chondrules (average apparent diameter about 200 μm) and chondrules fragments set in a fine-grained iron-rich matrix. Modal abundances: matrix 71 vol%, chondrules and chondrule fragments 29% (point counting, N=317). Infrared transmission spectra of matrix grains reveal the presence of phyllosilicates dominating the mineralogical assemblage and are comparable to those of CM chondrites (Beck et al., 2010. The 3-µm band, whose spectral characteristics are reflecting the chemistry of the phyllosilicate phases and are correlated with the alteration classification scheme of Rubin et al. (2007), shows that this meteorite experienced a relatively low extent of aqueous alteration, comparable to Murray (2.4/2.5).

Geochemistry: Olivine Fa16.6±13.1, PMD 66%, range Fa0.9-37.9 (N=5). Orthopyroxene Fs0.8Ws0.8 and FS7.2Wo3.8 (N=2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.23.

Classification: CM2

Specimens: Type specimen at CEREGE. Main mass with Kuntz.

Bibliography:
  • Beck P., Quirico E., Montes-Hernandez G., Bonal L., Bollarda J., Orthous-Daunay F.-R., Howard K.T., Schmitt B., Brissaud O., Deschamps F., Wunder B., and Guillot S. (2010) Hydrous mineralogy of CM and CI chondrites from infrared spectroscopy and their relationship with low albedo asteroids. Geochim. Cosmochim. Acta 74, 4881-4892 (link)
  • Rubin A.E., Trigo-Rogriguez J.M., Huber H., and Wasson J.T. (2007) Progressive aqueous alteration of CM carbonaceous chondrites. Geochim. Cosmochim. Acta 71, 2361-2382 (link)
Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2017
Mass (g):10.3
Pieces:1
Class:CM2
Weathering grade:moderate
Fayalite (mol%):16.6±13.1 (N=5)
Ferrosilite (mol%):0.8; 7.2 (N=2)
Wollastonite (mol%):0.8; 3.8
Magnetic suscept.:4.23
Classifier:J. Gattacceca, H. Pourkhorsandi, CEREGE ; L. Bonal, IPAG
Type spec mass (g):2.25
Type spec location:CEREGE
Main mass:Kuntz
Comments:work name K326; submitted by Jérôme Gattacceca
Institutions
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
Kuntz: Fabien Kuntz, France; Website (private address)
IPAG: Institut de Planétologie et d’Astrophysique de Grenoble 414, Rue de la Piscine Domaine Universitaire 38400 St-Martin d’Hères , France (institutional address; updated 1 Aug 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6968 approved meteorites from (Northwest Africa) (plus 2012 unapproved names)

Direct link to this page