Submit a Picture

Where is My Picture?!

The Queue

Met Name

Met Type

Thin Sections

Fall not observed. Found 1984 in Antarctica.302 grams. 80 x 80 x 60 mm.   Aubrite
Location Map of Antarctic Finds



AMN writes:

Macroscopic Description - Carol Schwarz

This aubrite fragment has a small amount of black fusion crust and more of the yellowish fusion crust(?)remaining on its surface. The specimen is a complex breccia with large clean white clasts, smaller light clasts with dark inclusions, dark blebs (possibly metal), dark clasts, and areas of dark material with light clasts.

Thin Section Description (,3) - Glenn MacPherson

ALH84007 is virtually identical to ALH84008 and the two may be paired. Localized staining by iron oxides as haloes around metal grains, indicates mild terrestrial weathering. Large (up to approximately 4 mm) intensely shocked enstatite crystals, (FeO is less than approximately 0.2%) are mostly monoclinic, but orthorhombic ones are present as well. The dusty brown matrix consists of granulated enstatite plus minor forsterite (FeO less than about 0.1%) and diopside (Wo41-44En56-59). Diopside occurs both as independent grains in the matrix and also as rounded inclusions within enstatite. Sparse, very large (over 3 mm) kamacite grains are present, invariably associated with a complex assemblage of phases that includes (at least) troilite, schreibersite, daubreelite and alabandite. This is an aubrite.

  Click to view larger photos     #1     #2     #3