Dear Jeff and others,
Your post on all ordinary chondrites experiencing some degree of aqueous
alteration has got me to wondering if some chondrites have (had) internal ice
locked between and within chondrules. When these fall to Earth would it be
possible for that water to return to a slightly moist state and cause internal,
rusting unrelated to the usual earthly causes? Especially if the meteorite were
cut open? Or did all that ancient water vaporize in space long, long ago?
Thanks for any additional light you can shed on this topic.
Bob
>Such chondrules start out as very fine-grained radial pyroxene chondrules
>or cryptocrystalline chondrules, both of which are composed of very tiny,
>densely packed pyroxene grains embedded in glass. Apparently, all
>ordinary chondrites experienced at least a small amount of aqueous
>alteration as fluids moved through the parent asteroid. Water dissolved
>the glass at the edges of these chondrules, leaving a rather porous
>network of pyroxene crystals behind. (Dr. Grossman)
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