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Northwest Africa 15749
Basic information Name: Northwest Africa 15749
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15749
Observed fall: No
Year found: 2022
Country: Algeria
Mass:help 34 g
Classification
  history:
Recommended:  CM2    [explanation]

This is 1 of 621 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 4 Mar 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15749 (NWA 15749)

Algeria

Find: 2022

Classification: Carbonaceous chondrite (CM2)

History: The stones were found by nomads in Algeria in 2022. and later bought by Pierre-Marie Pelé.

Physical characteristics: Dark grey fragments

Petrography: (J. Gattacceca, CEREGE; T. Prestgard, IPAG) Chondrite with small chondrules, chondrule fragments and CAIs (to 300 µm) set in an abundant iron-rich, fine-grained matrix (65 vol%). Many chondrules have fine-grained dust rims with radial cracks. Opaque minerals: sulfides (2.9 vol%), magnetite (2.1 vol%), metal (1.1 vol%, by point counting). X-ray diffraction analyses over a ~2 cm2 area on a polished section (D. Borschnek, CEREGE) reveal the presence of phyllosilicates, as typically observed in type 2 chondrites using the same experimental setup.

Geochemistry: Olivine Fa10.1±11.0, range Fa0.4-30.5 (n=10), Cr2O3 content in ferroan olivine Cr2O3 0.37±0.16 (n=5). Pyroxene Fs1.1±0.1Wo0.8±0.0 (n=3). Defocused anlyses of matrix FeO 37.2 wt%, analytical total 88.3 wt%

Classification: Carbonaceous chondrite (CM2)

Specimens: Type specimen at CEREGE. Main mass with Pierre-Marie Pelé.

Data from:
  MB112
  Table 0
  Line 0:
Date:2022
Mass (g):34
Pieces:many
Class:CM2
Weathering grade:low
Fayalite (mol%):10.1±11.0 (n=12)
Ferrosilite (mol%):1.1±0.1 (n=3)
Wollastonite (mol%):0.8±0.0
Magnetic suscept.:4.21
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):7.11
Type spec location:CEREGE
Main mass:Pierre-Marie Pelé
Finder:anonymous
Comments:work name PM-C-2022a; 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)
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. 112, in preparation (2023)
Find references in NASA ADS:
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1273 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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