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Northwest Africa 13252
Basic information Name: Northwest Africa 13252
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13252
Observed fall: No
Year found: 2019
Country: Morocco
Mass:help 99.3 g
Recommended:  L6-melt breccia    [explanation]

This is 1 of 70 approved meteorites classified as L6-melt breccia.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 5 Apr 2020
Writeup from MB 109:

Northwest Africa 13252 (NWA 13252)


Purchased: 2019

Classification: Ordinary chondrite (L6, melt breccia)

History: Sergey Vasiliev purchased the 99.3 g sample while at the Munich mineral show in 2019.

Physical characteristics: Sample has a rounded irregular shape, and is dark brown on the exterior with a dark-brown weathered fusion crust. The cut face of the interior is dark brown and shows a brecciated texture composed of clasts surrounded by dark veins.

Petrography: Description and classification (A. Love, App) Sample has a brecciated texture composed of cm-sized, sub-rounded clasts and mineral fragments surrounded by interconnected shock melt veins. Clasts shows recrystallized chondritic texture composed of indistinct chondrules (with an average apparent diameter of 829 µm, n=11) set within a recrystallized matrix. Secondary plagioclase has an average grain size of 63 µm (n=51). Additional minerals are troilite, phosphates and chromite.

Geochemistry: (A. Love, App) Olivine (Fa24.8±1.4, Fe/Mn=57.0±24.4, n=8), low-Ca pyroxene (Fs21.4±0.4Wo1.6±0.2, n=8).

Classification: Ordinary chondrite (L6 shock melt breccia C-S5/6 W4). Based on textures, olivine compositions and grainsize of secondary plagioclase, this sample is an L6. Presence shock melt veining, pervasive maskelynite, mosaic extinction and staining of olivine this sample has been shocked to C-S5/6 (Stoffler et al. 2018).

Specimens: Sergey Vasiliev holds the main mass. A 20 g type specimen and a polished thin section and mount are on deposit at App.

Data from:
  Table 0
  Line 0:
Place of purchase:Munich Mineral Show
Date:P 2019
Mass (g):99.3
Class:L6-melt breccia
Shock stage:C-S5/6
Weathering grade:W4
Fayalite (mol%):24.8±1.4
Ferrosilite (mol%):21.4±0.4
Wollastonite (mol%):1.6±0.2
Magnetic suscept.:4.51
Classifier:A. Love, App
Type spec mass (g):20.1
Type spec location:App
Main mass:Sergey Vasiliev
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 1932 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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