Hello List,
Have just purchased a nice slice of a low TKW LL3. NWA 2461.
The met bulliten lists Fayalite (mol%): 26.5±2.5
Ferrosilite (mol%): 12.5±7
The Met Bulliten also gives an official classification of an LL3. The
encyclopedia of meteorites states that an LL3 should have a Fs value of
32-40 so how can this be grouped as an LL3? The Fa value fits.
Looking at many other LL meteorites from the Met Base I see that the
majority have Fs values well belwo the 32-40 level. I wonder if I am
interpreting these incorreectly?
Any help would be gratly appreciated.
Cheers,
Mike Tettenborn
Owen Sound, Ontario
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