Michel & Jörn,
I have no access to those references so, just wanted to ask is it conceivable that the analyses reflect potash-type runoff or contamination from:
a) concentratin by long since evaporating ancient lake beds (like hot desert-low elevation in Tunisia, maybe?)
b) concentration by evapo
Dear Michel,
fairly high K2O values have been reported for C-like clast in the following meteorites:
LEW 85300 (polymict eucrite) 0.47% (C clast)
Supuhee (H6) 0.57% (clast)
Krähenberg (LL5) 1.45% (dark portion)
Miles (IIE silicated iron) 0.5% (silicates)
Cumberland Falls (aubrite) 0.43% (chondrit
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