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Northwest Africa 13567
Basic information Name: Northwest Africa 13567
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13567
Observed fall: No
Year found: 2020
Country: Morocco
Mass:help 1980 g
Recommended:  LL3.1    [explanation]

This is 1 of 9 approved meteorites classified as LL3.1.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 12 Dec 2020
Writeup from MB 109:

Northwest Africa 13567 (NWA 13567)


Purchased: 2020

Classification: Ordinary chondrite (LL3.1)

History: Carlos Muñecas (Expometeoritos) purchased the sample from a dealer in Ouarzazate, Morocco on 12 July 2020.

Physical characteristics: Sample has an irregular triangular shape and is ~50% covered in a dark brown weathered fusion crust. The cut face shows the interior is composed of numerous rounded chondrules and clasts set in a fine-grained metal-bearing matrix.

Petrography: Description and Classification (A. Love, App) Dominant unequilibrated chondritic host containing sparse matrix lumps and rare equilibrated and xenolithic clasts. Host contains well-defined, rimmed chondrules (average apparent diameter of 863µm, n=87) and fragments set within an opaque matrix with metal and sulfide. Additional minerals are: troilite, rare phosphates and anorthitic plagioclase. Common yellow mesostasis and low CL indicates sample is ?3.1.

Geochemistry: (A. Love, App) Olivine (Fa15.7±11.0 (Fa0.3-38.6), Fe/Mn=38.5±18.6, CaO (type I chondrules) 0.2±0.2wt%, mean concentration of Cr2O3 (ferroan olivine with Fa>2) is 0.3±0.24wt% (n=23); low-Ca Pyroxene (Fs14.6±6.3Wo1.3±0.9 (Fs5.7-25.1Wo0.4-3.4), Fe/Mn=25.0±12.2, n=10).

Classification: Ordinary chondrite (LL3.1 C-S2 W3). LL based on magnetic susceptibility and chondrule diameter. Based on range of Fa and mean and ? values of Cr2O3 contents within ferroan olivine, the sample is LL3.1 (Grossman and Brearley, 2005).

Specimens: Carlos Muñecas (Expometeoritos) holds the main mass. A slice weighing 26.18g and polished thin section are on deposit at App.

Data from:
  Table 0
  Line 0:
Place of purchase:Ouarzazate, Morocco
Date:P 2020
Mass (g):1980
Shock stage:C-S2
Weathering grade:W3
Fayalite (mol%):15.7±11.0
Ferrosilite (mol%):14.6±6.3
Wollastonite (mol%):1.3±0.9
Magnetic suscept.:4.01
Classifier:A. Love, App
Type spec mass (g):26.18
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 1887 approved meteorites from Morocco (plus 26 unapproved names) (plus 1 impact crater)

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