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Northwest Africa 11706
Basic information Name: Northwest Africa 11706
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11706
Observed fall: No
Year found: 2016
Country: Morocco
Mass:help 116 g
Classification
  history:
Recommended:  CK5    [explanation]

This is 1 of 149 approved meteorites classified as CK5.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 9 Apr 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11706 (NWA 11706)

Morocco

Purchased: Sept 2016

Classification: Carbonaceous chondrite (CK5)

History: A single stone weighing 116 g was purchased by Hichame Mimaghador at the Erfoud market, Morocco, in 2016.

Physical characteristics: A single stone, almost completely covered by a fusion crust with several contraction cracks.

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi): The thin section displays a texture consisting of mm-sized granular olivine-rich chondrules containing magnetite blebs well integrated in a medium grained olivine-rich matrix. A fine grained olivine-augite-plagioclase aggregate 500 × 250 μm wide is visible. Main minerals are olivine, augite, intermediate plagioclase. Opaques are mainly pentlandite and Cr-rich magnetite, with minor altered kamacite.

Geochemistry: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi) Olivine (Fa34.7±1.3, Fe/Mn = 142.0±8.1, N = 7), augite (Fs13.5±0.4Wo49.3±1.3, Al2O3 = 1.28 Wt.%, N = 6). Feldspar An55.0Ab43.9Or1.1. Magnetite contains 1.7±0.1 wt.% Cr2O3, 0.26 wt.% Al2O3, 0.23 wt.% NiO (N=3). Oxygen isotopes: (I. Franchi, R. Greenwood, OU) δ17O = -5.76 ‰, δ18O = -1.91 ‰, Δ17O = -4.76 ‰.

Classification: Carbonaceous chondrite (CK5). Moderate weathering.

Specimens: A total of 19.6 g specimen, a block (0.4 g) and a thin section are on deposit at MSN-Fi. 96 g with Mimaghador.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P Sept 2016
Mass (g):116
Pieces:1
Class:CK5
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):34.0±1.3 (n=7)
Ferrosilite (mol%):13.5±0.4 (n=6)
Wollastonite (mol%):49.3±1.3
Classifier:V. Moggi Cecchi, S. Caporali, G. Pratesi, UniFi
Type spec mass (g):20
Type spec location:MSN-FI
Main mass:Mimaghador
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 Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Public domain photographs:
Vanni Moggi Cecchi   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1304 approved meteorites from Morocco (plus 12 unapproved names) (plus 1 impact crater)

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