NWA 6933 – 32g

$395.00

1 in stock

Category:

Description

Eucrite, melt breccia.

Slice – 32g.  Size : 7 x 6.7 cm.
Sold in membrane box with label/certificate of authenticity.


Northwest Africa 6933 (NWA 6933)

(Northwest Africa)

Purchased: 2010

Classification: HED achondrite (Eucrite)

Petrography: (K. Metzler, IfP) Coarse-grained eucritic clasts with ophitic to subophitic textures and mineral fragments (pyroxene, plagioclase, silica polymorph) set in a dark gray matrix. The matrix represents a crystallized melt with subophitic texture consisting of pyroxene and skeletal plagioclase crystals. Lithic clasts and mineral fragments are strongly recrystallized. Some pyroxene fragments contain Fe-rich olivine veins. Accessories are ilmenite, troilite, and metal (mostly oxidized). Calcite veins occur.

Geochemistry: Plagioclase compositions: An 89.1±2.0 (85-93; n=15). Olivine veins: Fa75.

Classification: Eucritic melt rock