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Northwest Africa 10320
Basic information Name: Northwest Africa 10320
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10320
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 73.2 g
Meteoritical Bulletin:  MB 104  (2015)  Eucrite-cm
Recommended:  Eucrite-cm    [explanation]

This is 1 of 54 approved meteorites classified as Eucrite-cm.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 7 Oct 2015
Writeup from MB 104:

Northwest Africa 10320 (NWA 10320)


Purchased: 2006

Classification: HED achondrite (Eucrite, cumulate)

History: A single stone of 73.2 g was found by an anonymous finder in Western Sahara and purchased by Romano Serra at the Bologna Mineral Show in 2006.

Physical characteristics: The main mass has no fusion crust.

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi): A thin section displays a cumulate eucritic texture consisting of large orthopyroxene crystals, 200-250 μm in width, minor clinopyroxene and anorthitic plagioclase. Orthopyroxene crystals occasionally display fine, 3-5 μm wide pigeonite exsolution lamellae. Minor phases include ilmenite, troilite, chromite, and FeNi metal.

Geochemistry: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi) Calcic plagioclase An88.7±1.1Or0.5±0.1, n=6; low-Ca pyroxene (Fs54.3±1.3En43.3±1.4Wo2.4±0.2; n=7; Fe/Mn=47.03±0.16); pigeonite (Fs51.2±1.2En40.0±1.5Wo8.8±0.3; n=8; Fe/Mn=34.63±0.13); pigeonite exsolution lamellae in orthopyroxene (Fs40.6±1.5,En38.1±1.4Wo21.3±0.9; n=8; Fe/Mn = 39.41±0.12). Oxygen isotopes: (I.Franchi, R.Greenwood, OU) δ17O = 1.81‰, δ18O = 3.88‰, Δ17O = -0.21‰.

Classification: Eucrite-cm with low degree of shock and low degree of weathering.

Specimens: A total of 14.6 g specimen and one thin section is on deposit at MSN-FI. The main mass is on deposit at OAM.

Data from:
  Table 0
  Line 0:
Place of purchase:Bologna
Date:P 2006
Mass (g):73.2
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):54.3±1.3
Wollastonite (mol%):2.4±0.2
Classifier:V. Moggi Cecchi, S. Caporali, G. Pratesi, UniFi
Type spec mass (g):19.0
Type spec location:MSN-FI
Main mass:OAM
Comments:Submitted by Vanni Moggi Cecchi
Plots: O isotopes:  
   and collections
OAM: Museo del Cielo e della Terra Vicolo Baciadonne 1 40017 San Giovanni in Persiceto ( BO) Italy Osservatorio Astronomico e Museo "Giorgio Abetti", San Giovanni Persiceto, Bologna, Italy; Website (institutional address; updated 31 Oct 2012)
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
MSN-FI: Museo di Storia Naturale “La Specola”, Sez. Mineralogia – Sistema Museale dell'Università degli Studi di Firenze Via Giorgio La Pira, 4 – 50121 Firenze, Italy; Website (institutional address; updated 24 Oct 2022)
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 25 approved meteorites from Morocco, (Northwest Africa)
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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