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Northwest Africa 12852
Basic information Name: Northwest Africa 12852
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12852
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 504 g
Classification
  history:
Recommended:  L3    [explanation]

This is 1 of 681 approved meteorites classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 9 Aug 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12852 (NWA 12852)

(Northwest Africa)

Purchased: May 2018

Classification: Ordinary chondrite (L3)

History: Collected by nomads in Western Sahara and purchased by Nicola Castellano at the Genova Mineral Show in 2018 from a Moroccan dealer.

Physical characteristics: A black crust-covered single piece weighing 504 g. A cut surface displays several well formed chondrules.

Petrography: (V. Moggi Cecchi, G. Pratesi, UniFi); The thin section displays a marked chondritic texture, with PO, PP and POP chondrules ranging from 200 to 800 μm in a fine grained matrix. PO and POP chondrules display inhomogenesous olivine and orthopyroxene crystals, with a slight core-rim variability. Olivine is Fe-rich in the matrix while orthopyroxene is Mg-rich. Plagioclase is Na-rich. Opaque phases are consisting of iron oxides, Fe-Ni alloys and troilite as individual grains scattared in the matrix or rimming chondrules.

Geochemistry: EMP (V. Moggi Cecchi, G. Pratesi, UniFi); Olivine in chondrules and in matrix (Fa22.3±4.7Fo77.8±4.6; Fe/Mn = 58.6, n=23 ); Orthopyroxene in chondrules grains and in matrix (Fs17.8±6.3En81.3±3.3Wo0.9±0.1, Fe/Mn = 23.5, n=15); plagioclase (An6.0Or2.2);

Classification: Ordinary Chondrite (L3); S3; W3

Specimens: A total of 22.8 g specimen is on deposit at Museo di Storia Naturale dell’Università di Firenze (MSN-Fi). Castellano holds the main mass.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Genova
Date:P May 2018
Mass (g):504
Pieces:2
Class:L3
Shock stage:S3
Weathering grade:W3
Fayalite (mol%):22.3±4.7 (n=23)
Ferrosilite (mol%):17.8±6.3 (n=15)
Wollastonite (mol%):0.7±0.1
Classifier:V. Moggi Cecchi, G. Pratesi, MSN-FI
Type spec mass (g):22.8
Type spec location:MSN-FI
Main mass:Castellano
Finder:Anonymous
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. 108, in preparation (2019)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7048 approved meteorites from (Northwest Africa) (plus 1998 unapproved names)

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