Elemental analysis data (concentrations in ppm with about 10% uncertainty) of the studied samples.

Sample name	Na	K	Li	Al	Ca	Fe	Ti	Co	Cr	Cu	Ni	Mn	B	Mg
Al1000	1.3	0.3	0.4	1032	1.5	5.51	1.9	0.01	1.55	0.07	0.55	0.15	0.09	0.19
Al500	1.8	0.9	0.4	574	2.9	7.81	1.9	0.01	2.33	0.09	0.84	0.20	0.11	0.17
Al100	0.9	0.3	0.4	154	0.6	7.06	2.26	0.01	2.11	0.07	0.75	0.17	0.12	0.09
Al50	1.1	0.7	0.4	104	1.2	6.5	1.9	0.01	1.56	0.06	0.55	0.16	0.13	0.18
Al20	1.1	0.6	0.4	50	1.8	5.28	1.9	0.01	1.41	0.05	0.5	0.13	0.23	0.22
Reference	0.7	0.5	0.4	12	0.6	0.22	1.3	<0.01	<0.01	0.02	<0.01	0.01	<0.10	0.01