Table S6: Eclogite-melt distribution coefficients (= [C(eclogite)]/[C(melt)])							
		Measured							Estimated		
		Klemme	Xiong	Xiong 	Kessel	Salters	Kelemen	Kelemen
Element				    (rutile)	(6 GPa)			 		(rutile)
Cs				0.0085	0.0084	0.0047			
Rb		0.0018	0.025	0.024	0.01			
Ba		0.00078	0.03		0.029	0.0065	0.00076	0.02		0.02
Th		0.0037	0.046	0.046	0.0041	0.015	0.013	0.012
U		0.0068	0.068	0.067	0.006	0.042	0.019	0.019
Nb		0.013	0.035	0.97		0.0056	0.019	0.038	0.34
K		0.003	0.0064	0.0063					0.02		0.02
La		0.014	0.029	0.029	0.0049			0.064	0.063
Ce		0.028	0.046	0.045	0.0063	0.025	0.15		0.15
Pb		0.16						0.0093	0.007	0.043	0.042
Pr		0.051									0.3		0.29
Nd				0.15		0.15		0.038	0.063	0.56		0.56
Zr		0.28		0.57		0.61		0.11		0.24		3.1		3.5
Sr		0.035	0.021	0.02		0.0081			0.046	0.046
Sm		0.22		0.68		0.68		0.14		0.16		3.2		3.1
Eu								0.25				4.4		4.3
Gd		0.53						0.47				6.2		6.2
Tb				3.9		3.9						8.7		8.6
Dy								1.4				9.9		9.8
Ti		0.27		0.47		1.3		0.16				7.4		8.4
Y		1.97		9.7		9.6		0.78		1.2		15		15
Er								2.7		1.3		12		12
Yb				22		22		3.9		3.2		15		15

References:  Klemme et al., 2002; Xiong, 2006; Kessel et al., 2005b; Salters et al., 2002; Kelemen et al., 2003b				
			
'Measured' distribution coefficients are based on experiments on eclogitic compositions. 'Estimated' distribution coefficients are based on experiments on non-eclogitic compositions, theory or data for similar elements'							
Eclogites were assumed to contain 60 % garnet and 40 % clinopyroxene ('rutile' indicates 1 % rutile).					

The 6 Gpa data from Kessel et al., 2005b are for an aqueous supercritical phase.