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Northwest Africa 7287
Basic information Name: Northwest Africa 7287
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7287
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 2.56 kg
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  LL3-6
Recommended:  LL3-6    [explanation]

This is 1 of 28 approved meteorites classified as LL3-6.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 29 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7287 (NWA 7287)

(Northwest Africa)

Found: 2011

Classification: Ordinary chondrite (LL3-6)

History: Discovered by local people in the Tindouf area in 2011, purchased in Agadir in 2012 Feb.

Physical characteristics: One brown stone of 2564 g mostly covered with black-brown crust; saw-cut shows chondrules and various clasts set in fine-grained brown matrix. Magnetic susceptibility log χ = 3.75.

Petrography: Microprobe examination of a thin section shows fractured fine clastic matrix with mineral fragments, common porphyritic chondrules of 0.5 mm, and clasts of various textures. Beside matrix, five distinct lithologies identified based on texture and mineral composition

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Matrix: Olivine Fa0.5-4.3, mean Fa29.5±5.9, n=18; pyroxene Fs20.1-26.5Wo0.5-4.3, mean Fs23.9±2.1Wo2.4±1.4, n=8. Clasts (all): Olivine Fa24.1-34.0, mean Fa30.0±1.6, n=89; pyroxene Fs3.3-28.6Wo0.3-4.3, mean Fs22.4±6.6,Wo2.2±0.1, n=29.

Classification: Ordinary Chondrite (LL3-6)

Specimens: 25.6 g on deposit at MNRJ, main mass Bart.

Data from:
  MB102
  Table 0
  Line 0:
Origin or pseudonym:Tindouf
Place of purchase:Agadir
Date:2011
Mass (g):2564
Pieces:1
Class:LL3-6
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):30.0 (24.1-34.0, n=89)
Ferrosilite (mol%):22.4 (3.3-28.6, n=29)
Wollastonite (mol%):2.2 (0.3-4.3)
Magnetic suscept.:3.75
Classifier:Bart
Type spec mass (g):25.6
Type spec location:MNRJ
Main mass:Bart
Finder:anonymous
Comments:Submitted by R. Bartoschewitz
Institutions
   and collections
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
MNRJ: Museu Nacional, Quinta da Boa Vista, Rio de Janeiro, CEP 20940-040, Brazil (institutional address; updated 26 Dec 2011)
Bart: Bartoschewitz Meteorite Laboratory, Lehmweg 53, D-38518 Gifhorn, Germany; Website (private address; updated 4 Aug 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6984 approved meteorites from (Northwest Africa) (plus 2008 unapproved names)

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