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Northwest Africa 11263
Basic information Name: Northwest Africa 11263
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11263
Observed fall: No
Year found: 2016
Country: Morocco
Mass:help 281 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  R3
Recommended:  R3    [explanation]

This is 1 of 33 approved meteorites classified as R3.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 31 May 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11263 (NWA 11263)

Morocco

Purchased: Feb 2016

Classification: Rumuruti chondrite (R3)

History: Purchased by Giorgio Tomelleri from a Moroccan dealer.

Physical characteristics: Several small fragments with black fusion crusts (total weight 281 g).

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi): The thin section displays a texture consisting of separated, well-formed chondrules (ranging in diameter 0.3-0.9 mm), sometimes rimmed with pentlandite. Chondrules types are mainly PO, PP and POP; a forsterite-rich PO chondrule is present as well as an enstatite PP chondrule; the matrix is fine and contains olivine, orthopyroxene, clinopyroxene. Among opaque phases the most abundant is pentlandite although Ti-bearing chromite can be occasionally found.

Geochemistry: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi): Olivine in POP chondrules (Fa26.8±15.6, N = 15), orthopyroxene (Fs13.3±6.3Wo1.2±0.2, N = 8), clinopyroxene (Fs10.8±0.2Wo44.9±0.8, N = 4). Oxygen isotopes: (I.Franchi, R.Greenwood, OU) δ17O = 5.24 ‰, δ18O = 5.99 ‰, Δ17O = 2.12 ‰.

Classification: R3 chondrite

Specimens: 20 g including one polished thin section at MSN-Fi; main mass with Tomelleri.

Data from:
  MB106
  Table 0
  Line 0:
State/Prov/County:Morocco
Place of purchase:Erfoud
Date:P Feb 2016
Mass (g):281
Pieces:many
Class:R3
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):26.8±15.6 (n=15)
Ferrosilite (mol%):13.3±6.3 (n=8)
Wollastonite (mol%):1.2±0.2
Classifier:V. Moggi Cecchi, S. Caporali, G. Pratesi, MSN-FI
Type spec mass (g):20.0
Type spec location:MSN-FI
Main mass:Tomelleri
Comments:Submitted by Vanni Moggi Cecchi
Plots: O isotopes:  
Institutions
   and collections
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)
MSN-FI: MUSEO DI STORIA NATURALE DELL'UNIVERSITA' DEGLI STUDI DI FIRENZE Via Giorgio La Pira, 4 – 50121 FIRENZE, Italy; Website (institutional address; updated 14 Jan 2015)
UniFi: Università degli Studi di Firenze, P.zza S. Marco, 4 - 50121 Firenze, Italy (institutional address; updated 14 Sep 2013)
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)
Franco Vignato   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1390 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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