Meteoritical Bulletin: Entry for Northwest Africa 11706

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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: 116 g

Classification
history:

Meteoritical Bulletin:	MB 107	(2018)	CK5
Recommended:			CK5 [explanation]

This is 1 of 199 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

Writeup

help

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 (Fa_34.7±1.3, Fe/Mn = 142.0±8.1, N = 7), augite (Fs_13.5±0.4Wo_49.3±1.3, Al₂O₃ = 1.28 Wt.%, N = 6). Feldspar An_55.0Ab_43.9Or_1.1.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 “La Specola”, Sez. Mineralogia – Sistema Museale dell'Università degli Studi di Firenze Via Giorgio La Pira, 4 – 50121 Firenze, Italy; Website (institutional address; updated 24 Oct 2022)
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, MAPS 55, 460-462

Find references in NASA ADS:
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Photos:

Credit	Photos
Public domain photographs:
Vanni Moggi Cecchi

Geography:

Morocco

Morocco

Coordinates:

Unknown.

Statistics:
This is 1 of 1932 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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