New Identity of the Kimberlite Melt: Constraints from Unaltered Diamondiferous Udachnaya – East Pipe Kimberlite, Russia - Advances in Data, Methods, Models and Their Applications in Geoscience - page 186

1000

100

10

1

0

Rb Ba Th U NbTa K La Ce Pb Pr Sr P NdSmZr Hf Eu Ti Gd Tb Dy Y Ho Er TmYb Lu

Fig. 4. Trace element abundance patterns of the Udachnaya-East kimberlites (lines) and
kimberlites worldwide (field). All compositions are normalised to the “Primitive Mantle”
composition of Sun and McDonough (1989).

10

1

0.1

0.01 0.1 1 10

Na 2 O, wt%

Fig. 5. Compositional co-variations of Na 2 O and H 2 O (in wt.%) in the Udachnaya-East
kimberlites and “archetypal” rocks from South Africa, Greenland and Canada (field). The
trend to low sodium and high water contents is considered to be caused by post-magmatic
alteration.