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Northwest Africa 11085
Basic information Name: Northwest Africa 11085
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11085
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 200 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  CO3.0
Recommended:  CO3.0    [explanation]

This is 1 of 22 approved meteorites classified as CO3.0.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 26 Feb 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11085 (NWA 11085)

(Northwest Africa)

Purchased: 2015

Classification: Carbonaceous chondrite (CO3.0)

Physical characteristics: Dark brown stones. Cut surface reveals a brownish interioe.

Petrography: Chondrules (some with dust rims, average apparent diameter 270 μm, N=47), small CAIs in a fine-grained matrix. Opaques are metal (mostly replaced by weathering products) and sulfides. Modal abundances: chondrules and fragments 46 vol%, matrix 38 vol%, opaques 16 vol% (from point counting, N=104).

Geochemistry: Olivine Fa range 0.8-48.6, average Fa27.6±17.9, PMD 59%, FeO/MnO=98 (N=14), Cr2O3 on ferroan olivine 0.29±0.13 wt% (N=11). Orthopyroxene Fs1.8±0.4Wo1.5±0.5 (N=5). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.84.

Classification: CO3.0. Subtype from olivine Fa PMD, range, and Cr2O3 content. Strong weathering. Possibly paired with NWA 7892.

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

Data from:
  MB106
  Table 0
  Line 0:
Date:P 2015
Mass (g):200
Pieces:several
Class:CO3.0
Weathering grade:Severe
Fayalite (mol%):27.6±17.9 (N=14)
Ferrosilite (mol%):1.8±0.4 (N=5)
Wollastonite (mol%):1.5±0.5
Magnetic suscept.:4.84
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):23.5
Type spec location:CEREGE
Main mass:Fabien Kuntz and Pierre-Marie Pelé
Comments:work name K291; 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 10 Jun 2023)
Kuntz: Fabien Kuntz, France; Website (private address)
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.
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Christophe PICQ   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)
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Revision
  history:
  This lists important revisions made to data for this record.

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