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Northwest Africa 13258
Basic information Name: Northwest Africa 13258
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13258
Observed fall: No
Year found: 2019
Country: Morocco
Mass:help 340 g
Classification
  history:
Recommended:  CV3    [explanation]

This is 1 of 624 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 5 Apr 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13258 (NWA 13258)

Morocco

Find: 2019

Classification: Carbonaceous chondrite (CV3)

History: Purchased in November 2019 by Juan Aviles Poblador from Said Yousfii in Morocco.

Physical characteristics: Multiple stones with dark-brown fusion crust.

Petrography: (D. Sheikh, FSU) Sample contains abundant chondrules (Av. 1mm, up to 4mm), CAIs (Av. 2 mm, up to 4 mm), and isolated mineral fragments set in a fine-grained opaque matrix. Accesory phases include magnetite (some containing Cr), sodalite, and pentlandite.

Geochemistry: Olivine (Fa19.1±22.5, range Fa1.3-75.7, n=37), Low-Ca Pyroxene (Fs1.8±0.7Wo2.4±1.5, range Fs0.7-3.1Wo0.8-4.5, n=20).

Classification: Carbonaceous chondrite (CV3-Ox). Strong Mg-Fe zonation in chondrule olivine (the majority of chondrule olivines being Mg rich), the lack of FeNi metal, and the presence of magnetite, pentlandite, some isolated fayalite grains, and sodalite throughout the matrix point to the oxidized subgroup.

Specimens: 20.07 grams at UCLA; main mass with Juan Aviles Poblador.

Data from:
  MB109
  Table 0
  Line 0:
Date:2019
Mass (g):340
Pieces:11
Class:CV3
Shock stage:S2
Weathering grade:low
Fayalite (mol%):19.1±22.5
Ferrosilite (mol%):1.8±0.7
Wollastonite (mol%):2.4±1.5
Magnetic suscept.:4.63
Classifier:D. Sheikh, FSU
Type spec mass (g):20.07
Type spec location:UCLA
Main mass:Juan Aviles Poblador
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. 109, in preparation (2020)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Sergey Vasiliev   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Robert Smart      
Ryan Upchurch   
Said Yousfi   
Public domain photographs:
Daniel Sheikh   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2012 approved meteorites from Morocco (plus 35 unapproved names) (plus 1 impact crater)

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