[meteorite-list] Question about olivine diogenites

[bernd.pauli at paulinet.de]

Hello again,

Here are the approximate olivine contents the Met.Bull. gives for the following
"olivine-rich" diogenites. The lowest (modal) amount seems to be ca. 20%, which
leads me to assume that a diogenite must have at least 20% olivine (or more) to
be called an "olivine-diogenite".

Most olivine-rich diogenites, however, seem to have an olivine content of >= 45%
(so, maybe NWA 2286 would no longer be called "olivine-rich" nowadays):

NWA 2286: olivine approximately 20%
NWA 1877: olivine approximately 45%
NWA 5603: olivine approximately 45% (as it is paired with 1877)
NWA 4223: olivine approximately 50%
NWA 5480: olivine approximately 57%


Best wishes,

Bernd