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Northwest Africa 6152
Basic information Name: Northwest Africa 6152
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6152
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 200 g
Meteoritical Bulletin:  MB 100  (2012)  Brachinite
Recommended:  Brachinite    [explanation]

This is 1 of 58 approved meteorites classified as Brachinite.   [show all]
Search for other: Brachinites, Primitive achondrites
Comments: Approved 28 Aug 2011
Writeup from MB 100:

Northwest Africa 6152 (NWA 6152)

(Northwest Africa)

Purchased: 2010 Jan

Classification: Primitive achondrite (Brachinite)

History: Purchased in January 2010 by Hanno Strufe from a Moroccan dealer in Erfoud.

Physical characteristics: Eighteen small brownish stones with a total weight of 200 g.

Petrography: (A. Irving and S. Kuehner, UWS) Protogranular texture. Aggregate of predominantly olivine with subordinate orthopyroxene, clinopyroxene, chlorapatite, chromite, partly altered kamacite and troilite.

Geochemistry: Olivine (Fa30.6-30.7; FeO/MnO=63.7-66.7), orthopyroxene (Fs24.6-24.7Wo2.1; FeO/MnO=36.8-39.1), clinopyroxene (Fs9.8-10.2Wo43.6-43.2; FeO/MnO=28.1-29.6). Oxygen isotopes (D. Rumble, CIW): δ17O 2.23, 2.24; δ18O 4.65, 4.65; Δ17O -0.213, -0.210 per mil.

Classification: Brachinite. Although the mineralogy and mineral compositions are similar to those in NWA 5400 and paired stones, the oxygen isotopic composition is much different and precludes a pairing.

Specimens: A total of 21.4 g and one polished thin section are on deposit at UWS. The main masses are held by Mr. H. Strufe.

Data from:
  Table 1
  Line 1294:
Place of purchase:Erfoud
Date:P 2010 Jan
Mass (g):200
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):30.6-30.7
Ferrosilite (mol%):24.6-24.7; 9.8-10.2
Wollastonite (mol%):2.1±0.0; 43.8-43.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21.4
Type spec location:UWS
Main mass:H. Strufe
Comments:HS132; submitted by A. 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)
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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