NWA 6152 (1,600 g)

NWA 6152 (1,600 g)

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.

 

Place of purchase: Erfoud
Date: P 2010 Jan
Mass (g): 200
Pieces: 18
Class: Brachinite
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

 

 

    80,00 €Preis
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