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Northwest Africa 10770
Basic information Name: Northwest Africa 10770
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10770
Observed fall: No
Year found: 2015
Country: Western Sahara
Mass:help 171 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  EL6
Recommended:  EL6    [explanation]

This is 1 of 117 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 10770 (NWA 10770)

Western Sahara

Purchased: Mar 2015

Classification: Enstatite chondrite (EL6)

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

Physical characteristics: A single piece weighing 171 g without fusion crust.

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi): Matrix contains pyroxene, minor plagioclase and rare relict chondrules. Iron oxides/hydroxides veinlets are present, ranging in width from 140 to 180 μm. Relict chondrules are mainly RP type. Opaque phases are mainly kamacite and troilite, partially weathered to iron oxides. Alabandite and daubreelite as blades in troilite are accessory phases.

Geochemistry: EMP (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi) Orthopyroxene (Fs0.5En98.2Wo1.3), plagioclase (An13.8Or3.4); Si in kamacite = 0.6 wt.%, Ti in troilite = 5.7 wt.%

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

Specimens: A total of 28.0 g specimen is on deposit at MSN-Fi. Castellano holds the main mass and one thin section.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Bologna
Date:P Mar 2015
Mass (g):171
Pieces:1
Class:EL6
Shock stage:S2
Weathering grade:W3
Ferrosilite (mol%):0.5
Wollastonite (mol%):1.3
Classifier:V. Moggi Cecchi, S. Caporali, G. Pratesi, UniFi
Type spec mass (g):28.0
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
Find references in NASA ADS:
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Geography:

Western Sahara
Coordinates:Unknown.

Statistics:
     This is 1 of 203 approved meteorites from Western Sahara (plus 20 unapproved names)

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