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Northwest Africa 11708
Basic information Name: Northwest Africa 11708
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11708
Observed fall: No
Year found: 2016
Country: Morocco
Mass:help 1104 g
Classification
  history:
Recommended:  CK3    [explanation]

This is 1 of 37 approved meteorites classified as CK3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CK chondrites, CK3 chondrites, and CV-CK clan chondrites
Comments: Approved 17 Jul 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11708 (NWA 11708)

Morocco

Purchased: Feb 2016

Classification: Carbonaceous chondrite (CK3)

History: A stone weighing 1104 g was purchased by Hichame Mimaghador at the Erfoud market in 2016.

Physical characteristics: A single stone covered by fusion crust.

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi): The thin section displays separated, well-formed chondrules (ranging in diameter from 300 to 700 μm, mean value 350 μm) of different types, in a fine-grained matrix consisting of Fe-rich olivine and orthopyroxene, coarse grained Fe-rich olivine fragments and scattered opaque phases. Chondrule types are mainly PO, with minor POP and PP types. Main minerals are olivine, orthopyroxene, Ca-rich plagioclase and clinopyroxene. Opaques are mainly consisting of troilite and Cr-magnetite, with minor altered kamacite.

Geochemistry: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi) Olivine in PO and POP chondrules (Fa1.7±0.2, Fe/Mn = 11.4±1.1, N = 6); Olivine in mineral fragments (Fa38.9±5.3, Fe/Mn = 101.7±10.1, N = 10), Orthopyroxene in POP chondrules (Fs2.5±0.2Wo2.1±0.1, Fe/Mn = 11.5±1.2, N = 15); Matrix orthopyroxene (Fs43.5±3.5Wo1.2±0.2, Fe/Mn = 105.1±1.2, N = 5); fassaite (Fs4.4±0.4En56.6±0.3Wo39.0±0.9, Al2O3 = 6.0 Wt.%, N = 5). Feldspar An95.7Or0.1. Oxygen isotopes: (I. Franchi, R. Greenwood, OU) δ17O = -4.75 ‰, δ18O = -1.14 ‰, Δ17O = -4.15 ‰.

Classification: Carbonaceous chondrite (CK3). Moderate weathering.

Specimens: A total of 24 g specimen is on deposit at MSN-FI. The main mass is with owner.

Data from:
  MB107
  Table 0
  Line 0:
State/Prov/County:Morocco
Place of purchase:Erfoud
Date:P Feb 2016
Mass (g):1104
Pieces:1
Class:CK3
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):1.7±0.2 (n=6; PO ch.); 38.9±5.3 (n=10; Frag.)
Ferrosilite (mol%):2.5±0.2 (n=15); 4.4±0.4 (n=5);
Wollastonite (mol%):2.1±0.1; 39.0±0.9;
Classifier:V. Moggi Cecchi, S. Caporali, G. Pratesi, UniFi
Type spec mass (g):24.0
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:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Hichame Mimaghador   
Public domain photographs:
Vanni Moggi Cecchi   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1374 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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