fig17.htm

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.


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