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NWA 11230   contributed by Pete Zemeckas   MetBul Link


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Copyright (c) Peter Zemeckas.
  L6

TKW 165 grams. Fall not observed.
 


Pete writes:
A pleasant surprise, after I cut open this unclassified stone and saw its shock melt veins with my microscope!

Throughout the veins there are metal globules (I suspect troilite), and along some lengths they formed in an interesting organised pattern following with the edge of the veins. Within the rest there is black brecciated glass.

The recrystallized matrix is a beautiful mix of deep red, yellow, and green hues.

Picture 2 is 1.2 mm across, pictures 3 to 6 are 2.5 mm across.

If you'd like to see more pics of these veins and matrix, I have an album here.


  Click to view larger photos     #1     #2     #3     #4     #5     #6
 


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Tomorrow

Glorieta Mountain
Paul Swartz

This Month

2 pictures in the Queue
Bob Verish
 2/22/2015 12:30:40 PM		 I like photo 5 the best. I interpret that vein having a cross-section that exhibits a thin chill-margin with an adjacent quench-zone that has small metal/sulfide blebs segregated close to the chill-margin, and medially having a final zone of melt breccia (with its own segregation of even finer metal/sulfide blebs) that may have been a separate pulse of melt into this vein. In any case this vein tells an interesting story. Thanks for posting your images.
gourgues denis
 2/22/2015 6:19:48 AM		 Unbelievable lots of Pictures of this Strange matrix... Nice angular black ... Very interesting !!!
Graham
 2/22/2015 5:02:57 AM		 Good find Pete....wonderful thinking about how these came about..not seen that before.
Ren* Schmit
 2/22/2015 3:10:55 AM		 beautiful!!!
 

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