[meteorite-list] Vugs in chondrite meteorites

[Kevin Forbes]

Hi Bernd and list.
Some more questions regards these.
What might cause vugs to form in some stones when the majority are solid and 
lack porosity?
What other methods of crystal growth may occur when the term equilibration 
is used if not via a melt, solution or vapour?

Cheers for now, Kevin Forbes.

>Hi Jerry and List,
>
>Small crystals in chondrite vugs are not as unusual as one might think. The 
>two most
>famous chondrites in this respect are Baszkowka and Mount Tazerzait. They 
>are very
>porous and have numerous vugs that are coated with druse-like clear 
>crystals, usually
>stubby crystals of the main constituents of the meteorite: olivine, 
>pyroxene, troilite,
>and FeNi. These crystals (in Baszkowka and Mount Tazerzait) grew during 
>equilibration
>into the free space available.
>
>Reference:
>
>WLOTZKA F. et al. (1997) Petrography and noble gases of the unusual L5
>chondrites Baszkówka and Mt. Tazerzait (Meteoritics 32-4, 1997, A140).
>
>Best wishes,
>
>Bernd
>
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