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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