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Northwest Africa 13746
Basic information Name: Northwest Africa 13746
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13746
Observed fall: No
Year found: 2017
Country: Western Sahara
Mass:help 22 g
Classification
  history:
Recommended:  CVox3    [explanation]

This is 1 of 14 approved meteorites classified as CVox3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 20 Mar 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13746 (NWA 13746)

Western Sahara, Morocco

Find: 20 Oct 2017

Classification: Carbonaceous chondrite (CVox3)

History: A single stone weighing 22 g was found by Mostafa Hnini on 20 October 2017 in the vicinity of Smara, Morocco. The stone was purchased and cut for classification by Michael Kelly on 10 July 2020.

Physical characteristics: The stone is 90% covered with smooth black semi-glossy fusion crust. The exterior shows little signs of weathering. The cut face displays white chondrules and calcium aluminum rich inclusions set in a black matrix.

Petrography: (D. Sheikh, FSU) Specimen is composed of well-defined chondrules (Av. ~1 mm, 45 vol%), calcium-aluminum-rich inclusions, and isolated mineral fragments (some contain fayalitic olivine) set in an opaque matrix composed of magnetite and pentlandite (Matrix vol%=55%). No Fe-Ni metal was observed.

Geochemistry: Olivine (Fa8.2±14.1, range Fa0.5-81.3, n=47), Low-Ca Pyroxene (Fs1.4±0.5Wo1.1±0.4, range Fs0.8-2.6Wo0.6-1.9, n=9). Sulfides have average Ni content 3.1±1.7 wt% (n=4).

Classification: Carbonaceous chondrite (CVox3). The mineral compositions and texture indicate classification as a CV3. The magnetic susceptibility and Ni concent of pentlandite indicate classification to the Bali subgroup of oxidized CV3 chondrites (Gattacceca et al., 2020).

Specimens: 6.6 grams at UCLA, main mass with Sydney, Cadence, and Michael Kelly.

Bibliography:
  • Gattacceca J.,Bonal L.,Sonzognia C., and Longereya J. (2020) CV chondrites: More than one parent body. Earth Planet. Sci. Letts. 547, 116467. (link)
Data from:
  MB110
  Table 0
  Line 0:
State/Prov/County:Western Sahara
Date:20 Oct 2017
Mass (g):22
Pieces:1
Class:CVox3
Shock stage:low
Weathering grade:low
Fayalite (mol%):8.2±14.1
Ferrosilite (mol%):1.4±0.5
Wollastonite (mol%):1.1±0.4
Magnetic suscept.:4.52
Classifier:D. Sheikh, FSU
Type spec mass (g):6.6
Type spec location:UCLA
Main mass:Sydney, Cadence, and Michael Kelly
Finder:Mostafa Hnini
Comments:Submitted by Daniel Sheikh
Institutions
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Western Sahara
Coordinates:Unknown.

Statistics:
     This is 1 of 240 approved meteorites from Western Sahara (plus 19 unapproved names)

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