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Northwest Africa 13569
Basic information Name: Northwest Africa 13569
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13569
Observed fall: No
Year found: 2020
Country: Morocco
Mass:help 24.2 g
Recommended:  CV3    [explanation]

This is 1 of 619 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 17 Dec 2020
Writeup from MB 109:

Northwest Africa 13569 (NWA 13569)


Purchased: 2020

Classification: Carbonaceous chondrite (CV3)

History: Carlos Muñecas (Expometeoritos) purchased the sample from a dealer in Guelmim, Morocco, on 20 July, 2020.

Physical characteristics: Sample is irregularly shaped and dark brown, with yellowish-orange chondrules. The cut face shows the interior is composed of dispersed metal-bearing chondrules and CAIs in an opaque matrix.

Petrography: Description and classification (A. Love, App) Sample shows chondritic texture composed of well-formed chondrules with an average apparent diameter of 547 µm (n=47) and CAIs set in a reddish brown matrix (~50 vol%) dominated by phyllosilicates (with low analytical totals). Metal and sulfide occurs mostly within chondrules. Glassy mesostasis is observed, but rare. Additional minerals are: calcite, troilite, chromite, phosphate. Mass magnetic susceptibility was measured using a ZH Instruments SM-30 pocket MS meter. Quadruplicate measurements of seven samples produced log χ (× 10-9 m3/kg) = 3.94. Magnetic susceptibility falls within the range measured for CV chondrites.

Geochemistry: (A. Love, App) Olivine (Fa14.6±13.8, range Fa2.1-44.5, Fe/Mn=62.9±35.1, n=16); low-Ca Pyroxene (Fs17.3±0.3Wo1.6±0.1, Fe/Mn=22.3±0.5, n=10); plagioclase (An12.0±0.3Or4.8±0.7, n=5).

Classification: Carbonaceous chondrite (CV3, C-S2). Sample is a carbonaceous chondrite based on the abundance of matrix and CAIs. Magnetic susceptibility and presence of metal suggests the sample is CV3 reduced.

Specimens: Carlos Muñecas (Expometeoritos) holds the main mass. 3 slices weighing 4.9 g and a polished thin section are on deposit at App.

Data from:
  Table 0
  Line 0:
Place of purchase:Guelmim, Morocco
Date:P 2020
Mass (g):24.2
Shock stage:C-S2
Weathering grade:moderate
Fayalite (mol%):14.6±13.8
Ferrosilite (mol%):17.3±0.3
Wollastonite (mol%):1.6±0.1
Magnetic suscept.:3.94
Classifier:A. Love, App
Type spec mass (g):4.9
Type spec location:App
Main mass:Carlos Muñecas (Expometeoritos)
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)
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     This is 1 of 1991 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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