スライド 1

Fig. 15 Ren, Z.-Y., Takahashi, E., Orihashi, Y., Johnson, K. T. M.
30
northern rift cone
Primitive Mantle Normalized
S691-4B
northern rift
25
20
arcuate tip
S691-5A,B
southern rift
15
10
5
0
Rb Ba Th U Nb Ta La Ce Pr Sr NdSm Zr Hf Eu GdDy Y Er Yb
Elements