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Northwest Africa 10038
Basic information Name: Northwest Africa 10038
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10038
Observed fall: No
Year found: 2014
Country: Morocco
Mass:help 255 g
Meteoritical Bulletin:  MB 104  (2015)  L5
Recommended:  L5    [explanation]

This is 1 of 6696 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 3 Apr 2015
Writeup from MB 104:

Northwest Africa 10038 (NWA 10038)


Purchased: 2014

Classification: Ordinary chondrite (L5)

History: Purchased by Nicola Castellano at the Genova Mineral Fair in May 2014 from a Moroccan dealer.

Physical characteristics: Single stone, dark brown crust. The sawn surface shows dark-gray, very fine-grained, shock-melted veins up to 2 mm wide intersecting the coarse grained, light gray chondritic matrix.

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi) Two distinct domains have been observed on a thin polished section by means of microprobe examination: the chondritic host shows an equilibrated chondritic texture, with a crystalline matrix surrounding few clearly detectable chondrules (mainly BO, POP and PP types). Main matrix phases are olivine, orthopyroxene, minor plagioclase and diopside, Fe-Ni metal and troilite; the shock-melted domain displays olivine grains set in a microcrystalline to glassy portion, green in plane polars, made of quenched silicates (mainly pigeonite) with scattered rounded metal and troilite blebs, up to 20 μm wide.

Geochemistry: (V. Moggi Cecchi, G. Pratesi, S. Caporali, M.Zoppi, UniFi) Chondritic domain: olivine (Fa25.0±0.2, Fe/Mn=50±2, n=7); low-Ca pyroxene (Fs21.0±0.1En77.7±0.3Wo1.3±0.0, 0.49 TiO2, 0.42 Al2O3, 0.68 Cr2O3, all wt. %; Fe/Mn=30±2, n=7); diopside (Fs7.4En47.7±0.3±0.1Wo44.9±0.3; 0.49 TiO2, 0.42 Al2O3, 0.68 Cr2O3, 0.16 MnO, 0.46 Na2O, all wt. %); shock melted domain: olivine grains (Fa22.9±0.6, Fe/Mn=53±2, n=10); microcrystalline portion (Fs21.8±0.3En73.7±0.4Wo4.5±0.1, 3.33 Al2O3, 0.43 MnO, 0.08 TiO2, 0.45 Cr2O3, 0.45 Na2O, 0.23 K2O, all wt. %, n=7).

Classification: Ordinary Chondrite (L5)

Specimens: A total of 22.5 g specimen and one thin section is on deposit at MSN-FI. Castellano holds the main mass.

Data from:
  Table 0
  Line 0:
Origin or pseudonym:Smara
Place of purchase:Genova
Date:P 2014
Mass (g):255
Shock stage:S5
Weathering grade:W3
Fayalite (mol%):25.0 (host), 22.9 (melt)
Ferrosilite (mol%):21.0 (host), 21.8 (melt)
Wollastonite (mol%):1.3 (host), 4.5 (melt)
Classifier:V. Moggi Cecchi, S. Caporali, G. Pratesi, MSN-FI
Type spec mass (g):22.5
Type spec location:MSN-FI
Main mass:Castellano
Comments: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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 1460 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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