280 views

Over 15,000 photos and growing!


  14 - May - 2016

This Month       Today's Picture       Select a Month

Submit a Picture

Where is My Picture?!

The Queue


Select by   Contributor

Met Name

Met Type

Thin Sections


Recent Comments

ALH 84008   contributed by AMN   MetBul Link


Roll Overs:     #1   #2   #3    


Click the picture to view larger photos

View all entries for   Meteorite (2)   AMN (153)


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
 


Comment on this MPOD                      
Name
Comment

980 max length

  Please - NO Dealer Ads in the comments
but pictures from dealers are gladly accepted

Tomorrow

Oakley
John Divelbiss

This Month

3 pictures in the Queue
Graham Macleod
 5/15/2016 2:56:28 AM
Love the texture and the crust! Thanks for sharing this with us AMN,
John Divelbiss
 5/14/2016 9:09:17 AM
Superb looking Aubrite with the typical candy-like cream colored crust. Thanks AMN.
MexicoDoug
 5/14/2016 2:15:03 AM
Warning: Aubrites, and in particular ALH84008, contain oldhamite that smells like rotten eggs. If you cut one, it stinks.
 

Hosted by
Tucson Meteorites
Server date and time
2/25/2024 7:55:17 AM
Last revised
12/31/23
Terms of Use Unsubscribe