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Northwest Africa 13609
Basic information Name: Northwest Africa 13609
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13609
Observed fall: No
Year found: 2019
Country: Mauritania
Mass:help 41.6 g
Recommended:  L3    [explanation]

This is 1 of 783 approved meteorites (plus 1 unapproved name) classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 5 Dec 2021
Writeup from MB 110:

Northwest Africa 13609 (NWA 13609)

Mauritania, (Northwest Africa)

Find: 2019

Classification: Ordinary chondrite (L3)

History: A single stone weighing 42 g was found by an anonymous finder in Western Sahara and purchased in 2019 at the Bologna Mineral Fair by Lucian Cojocaru.

Physical characteristics: The main mass, with several cracks and markedly stained, displays no fusion crust.

Petrography: (V. Moggi Cecchi, L. Fabrizi, G. Pratesi, UniFi): The thin section displays a well-defined chondritic texture, with various chondrule types (PP, PO and BO) set in a fine grained matrix. Both olivine and orthopyroxene are rather inhomogeneous. Iron oxides, Fe-Ni alloys and troilite are the main opaque phases and can be found as individual grains scattared in the matrix or rimming chondrules.

Geochemistry: EMP (V. Moggi Cecchi, G. Pratesi UniFi); Olivine in both chondrules and matrix (Fa24.9±4.7Fo75.1±3.9; n=56; Fe/Mn = 43.8); low-Ca pyroxene in both chondrules and matrix (Fs17.2±4.2En81.6±3.3Wo0.7±0.2; n=47; Fe/Mn = 23.0).

Classification: Ordinary Chondrite (L3); S1; W2

Specimens: Lucian Cojocaru owns the main mass, weighing 41.6 g; the type specimen, weighing 10.0 g, and one thin section are on deposit at MSN-FI (Inventory # I-3625)

Data from:
  Table 0
  Line 0:
Place of purchase:Bologna Mineral Fair
Mass (g):41.6
Shock stage:S1
Weathering grade:W2
Fayalite (mol%):24.9±4.7 (N=56)
Ferrosilite (mol%):16.5±2.4 (N=35)
Wollastonite (mol%):0.7±0.2
Classifier:V. Moggi Cecchi, L. Fabrizi
Type spec mass (g):10.0
Type spec location:MSN-FI
Main mass:Lucian Cojocaru
Comments:Provisional name NWA 13610; Inventory # I-3625; submitted by Vanni Moggi Cecchi
   and collections
MSN-FI: MUSEO DI STORIA NATURALE DELL'UNIVERSITA' DEGLI STUDI DI FIRENZE Via Giorgio La Pira, 4 – 50121 FIRENZE, Italy; Website (institutional address; updated 14 Jan 2015)
UniFi: Università degli Studi di Firenze, P.zza S. Marco, 4 - 50121 Firenze, Italy (institutional address; updated 14 Sep 2013)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 165 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)

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