283 views

Over 15,000 photos and growing!


  21 - January - 2015

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

NWA 8669   contributed by John Higgins, IMCA 9822   MetBul Link


Roll Overs:     #1   #2   #3    


Click the picture to view larger photos

View all entries for   Meteorite (1)   John Higgins (3)


Photo by John Higgins.  
  Ureilite

TKW 85 grams. Fall not observed. Purchased May 2014 in Morocco.

John writes:
Ultramafic Achondrite

This Meteorite is extreme in two respects, it has the highest shock value and weathering value for its type. Similar to Almahata Sitta to the extent that NWA 8669 has also experienced recrystallization of olivine and pyroxene with partial melting. It has been theorized that the shock and resulting heating event on the ultramafic parent body was so extreme that even the diamond content in this specimen has been partially vaporized! The color is not typical of Ureilites and represents complete conversion of iron to hydroxides by thousands of years of terrestrial weathering. This resulted in the finely recrystallized olivines being stained the highly distinctive orange-red color.


  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

NWA 3154 TS
Peter Marmet

This Month

1 picture in the Queue
George
 1/21/2015 5:07:20 PM
Looks like a super rare Polymict Ureilite with exotic clasts and chondrule type structures showing dual lithology. Certainly a intriguing and beautiful specimen. A similar Ureilite is DaG 1047 and of course Almahata Sitta. These rare Ureilites have been known to contain ordinary chondrules, and particularly R-chondrite, E-chondrite and Carbonaceous inclusions.
Bernd Pauli
 1/21/2015 8:44:47 AM
Yep, Graham, you name it! Looks polymict, ... a fragmental breccia!
Graham
 1/21/2015 7:44:47 AM
Nice specimen...but no mention of the obvious twin lithology...the centre section looks like some sort of flowing melt...the outside two sections look almost chondritic...any explanation for that?
Dr. Mike Reynolds
 1/21/2015 6:43:20 AM
Terrific specimen, John. Thanks for sharing the images with us.
Tomasz Jakubowski
 1/21/2015 3:13:00 AM
great URE....
Takis Theodossiou
 1/21/2015 2:24:31 AM
give the 'meteorite bread' to the people!!!
 

Hosted by
Tucson Meteorites
Server date and time
3/29/2024 4:50:39 AM
Last revised
12/31/23
Terms of Use Unsubscribe