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Northwest Africa 10773
Basic information Name: Northwest Africa 10773
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10773
Observed fall: No
Year found: 2015
Country: Western Sahara
Mass:help 3.12 kg
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  EL6
Recommended:  EL6    [explanation]

This is 1 of 116 approved meteorites classified as EL6.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites
Comments: Approved 23 Aug 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10773 (NWA 10773)

Western Sahara

Purchased: May 2015

Classification: Enstatite chondrite (EL6)

History: Collected by nomads in Western Sahara and purchased by Nicola Castellano at the Genova Mineral Fair in May 2015 from a Moroccan dealer.

Physical characteristics: A single piece weighing 3120 g partially covered by fusion crust.

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi): The meteorite consists of a fine-grained, pyroxene-dominant matrix, with minor plagioclase. No chondrules are visible. Kamacite and troilite are the main opaque phases, partially weathered to iron oxides. Accessory phases are alabandite and daubreelite as blades in troilite.

Geochemistry: EMP (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi) Orthopyroxene (Fs0.2En98.3Wo1.5), plagioclase (An14.3Or4.1); Si in kamacite = 0.5 wt.%, Ti in troilite = 6.3 wt.%

Classification: The presence of alabandite, An content of plagioclase and Si content of kamacite point to a classification as enstatite chondrite (EL6); S2; W3

Specimens: A total of 84.0 g and one thin section is on deposit at MSN-Fi. Castellano holds the main mass.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Genova
Date:P May 2015
Mass (g):3120
Pieces:1
Class:EL6
Shock stage:S2
Weathering grade:W3
Ferrosilite (mol%):0.2
Wollastonite (mol%):1.5
Classifier:V. Moggi Cecchi, S. Caporali, G. Pratesi
Type spec mass (g):84.0
Type spec location:MSN-FI
Main mass:Castellano
Comments:Submitted by Vanni Moggi Cecchi
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography:

Western Sahara
Coordinates:Unknown.

Statistics:
     This is 1 of 206 approved meteorites from Western Sahara (plus 20 unapproved names)

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