Figure 17. Conventional Ne three-isotope plot indicates mixing between atmospheric,
primordial (solar-like) and radiogenic end-members.
The isotopic ratios in Ne extracted by crushing [Marty et al., 1998] follow the
plume-like trend traced previously by basalts from Loihi seamount, Hawaii; whereas the
ratios in bulk samples [Tolstikhin et al., 1985] approach the MORB array. When
in-situ produced
21Ne* and
22Ne* were subtracted from the bulk abundances using
He-Ne systematics [Honda, 1993], the corresponding data-points shift to the left-top and
joint the plume trend. See definitions of symbols in Figure 15 and sources for MORB
and OIB data in Figure 11.