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Northwest Africa 7289
Basic information Name: Northwest Africa 7289
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7289
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 40.8 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  R4
Recommended:  R4    [explanation]

This is 1 of 58 approved meteorites classified as R4.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 29 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7289 (NWA 7289)

(Northwest Africa)

Found: 2011

Classification: Rumuruti chondrite (R4)

History: Discovered by local people in Erg Chech in 2011, purchased in Agadir in 2012 Feb.

Physical characteristics: Two black stones of 25.2 and 15.6 g, both fusion crusted, the bigger one with primary and secondary crust. Saw-cut shows light-gray chondrules set in fine-grained, darker gray matrix together with paler clasts. Magnetic susceptibility log χ =3.59.

Petrography: Thin section shows numerous dominantly porphyritic, but also barred chondrules up to 1 mm (mean 0.6 mm), various mineral fragments and clasts set in fine-grained matrix.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine: Fa35.7-40.3, mean 39.6, σ=0.90 (n=22); low-Ca pyroxene Fs31.5Wo1.8 (n=1), ; Ca-rich pyroxene Fs12En43Wo46 (n=2); feldspar An7-9Or4-5 (n=3); chromite: Cr/(Cr+Al) = 84, Fe/(Fe+Mg) = 98 (n=3).

Classification: Rumuruti chondrite (R4)

Specimens: 8.3 g on deposit at Kiel, main mass Bart.

Data from:
  MB102
  Table 0
  Line 0:
Origin or pseudonym:Erg-Chech
Place of purchase:Agadir
Date:2011
Mass (g):40.8
Pieces:2
Class:R4
Shock stage:S4
Fayalite (mol%):39.6 (35.7-40.3, n=22)
Ferrosilite (mol%):31.5 (n=1)
Wollastonite (mol%):1.8
Magnetic suscept.:3.59
Classifier:Bart
Type spec mass (g):8.3
Type spec location:Kiel
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)
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 7009 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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