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Northwest Africa 5297
Basic information Name: Northwest Africa 5297
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5297
Observed fall: No
Year found: 2008
Country: Morocco
Mass:help 130 g
Meteoritical Bulletin:  MB 98  (2010)  Primitive achondrite
Recommended:  Achondrite-prim    [explanation]

This is 1 of 16 approved meteorites classified as Achondrite-prim.   [show all]
Search for other: Primitive achondrites
Comments: Approved 14 May 2010
Writeup from MB 98:

Northwest Africa 5297 (NWA 5297)


Found: Mar 2008

Classification: Primitive achondrite

History: Found near Alargoug, Morocco, in March 2008 and purchased in June 2008 by Greg Hupé from a Moroccan dealer.

Physical characteristics: A total of nine dark stones with visible metal and a combined weight of 130 g.

Petrography: (A. Irving and S. Kuehner, UWS) This specimen has a poikiloblastic metamorphic texture with no chondrules and contains relatively abundant (approximately 10 vol. %) Ni-rich metal. The major phases are olivine, low-Ca pyroxene, taenite and very sodic plagioclase with minor Ni-bearing troilite.

Geochemistry: Olivine (Fa28.6, FeO/MnO = 54.4), plagioclase (Ab86.2An9.1Or4.7), taenite (approximately 10 wt.% Ni). Oxygen Isotopes (D. Rumble, CIW): replicate analyses of acid-washed silicate material by laser fluorination gave, respectively: δ18O = 4.830, 5.032; δ17O = 3.711, 3.818; Δ17O = 1.171, 1.171 per mil.

Classification: This specimen is an ungrouped primitive achondrite with an oxygen isotopic composition like those of LL chondrites; however, it contains too much metal to be regarded as a product of metamorphism of typical LL chondrites.

Specimens: A total of 20 g and one polished thin section are on deposit at UWS. Main mass, GHupé.

Data from:
  Table 1
  Line 29:
Date:Mar 2008
Mass (g):130
Class:Primitive achondrite
Fayalite (mol%):28.6
Classifier:A. Irving, S. Kuehner, UWS
Type spec mass (g):20
Type spec location:UWS
Main mass:GHupé
Comments:Submitted by Irving
Plots: O isotopes:  
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
CIW: Carnegie Insitution Washington, Geophysical Laboratory, 5251 Broad Branch Rd., NW, Washington DC 20015, United States (institutional address)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 98, MAPS 45, 1530-1551 (2010)
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     This is 1 of 2089 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater)

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