MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 21 Jan 2022
Search for: Search type: Search limits: Display: Publication:
Text help
Starts with
Sounds like
Falls  Non-NWAs
What's new
  in the last:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Northwest Africa 13575
Basic information Name: Northwest Africa 13575
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13575
Observed fall: No
Year found: 2020
Country: Morocco
Mass:help 1912 g
Recommended:  CVox3    [explanation]

This is 1 of 16 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 16 Dec 2020
Writeup from MB 109:

Northwest Africa 13575 (NWA 13575)


Purchased: 2020

Classification: Carbonaceous chondrite (CVox3)

History: Many samples of various sizes were found by a nomad in northwest Africa. These meteorites were by Adrián Contreras purchased the samples in Errachidia, Morocco, from Hmad Ait Hssain. Meteorites ranging in mass from a few grams to the main mass of 257 g.

Physical characteristics: Samples are dark in color, irregular-shaped and devoid of fusion crust. Chondrules and CAIs are visible on the exterior.

Petrography: Description and Classification (A. Love, App) Sample shows chondritic texture composed of dispersed chondrules (w/ and average apparent diameter of 875 µm, n=19) and CAI’s in an opaque matrix. Additional minerals are: magnetite, Ni-rich sulfide, apatite.

Geochemistry: (A. Love, App) Olivine (Fa8.6±10.5, range Fa0.7-38.0, Fe/Mn=61.7±46.8, n=19); low-Ca Pyroxene (Fs5.4±4.5Wo1.8±1.0, Fe/Mn=15.6±10.8, n=4); Ni content of sulfides=15.7±9.2, n=9.

Classification: Carbonaceous chondrite (CVox3). Based on textures, and mineral composition sample is a CV3. Based on magnetic susceptibility and Ni content of sulfides sample belongs to the Ox-Bali subgroup (Gattacceca et al., 2020).

Specimens: Adrián Contreras holds the 257 g main mass. A 30.75 g fragment and a polished thin section are on deposit at App.

  • 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:
  Table 0
  Line 0:
Place of purchase:Errachidia, Morocco
Date:P 2020
Mass (g):1912
Shock stage:low
Weathering grade:low
Fayalite (mol%):8.6±10.5 (n=19)
Ferrosilite (mol%):5.4±4.5
Wollastonite (mol%):1.8±1.0
Magnetic suscept.:4.30
Classifier:A. Love, App
Type spec mass (g):30.75
Type spec location:App
Main mass:Adrian Contreras
Comments:Submitted by Anthony Love
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:


     This is 1 of 1743 approved meteorites from Morocco (plus 26 unapproved names) (plus 1 impact crater)

Direct link to this page