Table 2.

Geological data of the different analyzed samples.

Elements	B11	B12	B13	B14	B15	B16	B17	B18	B19	B20
SiO2(%)	62.06	99.60	70.22	66.82	67.07	1.9	50.55	45.74	78.16	51.07
TiO2	0.78	0.04	0.53	0.69	0.76	0.06	1.18	1.12	0.06	1.56
Al2O3	18.47	0.24	13.76	14.35	16.29	70.90	14.19	14.11	11.61	13.63
Fe2O3	6.98	0.64	4.31	6.54	6.99	13.09	12.99	13.86	0.97	15.18
MnO	0.05	0.02	0.06	0.09	0.05	1.74	0.14	0.17	0.02	0.11
MgO	1.91	<0.01	1.56	2.59	1.86	1.27	3.93	4.45	0.06	3.86
CaO	0.45	0.01	3.27	3.46	0.55	6.26	4.80	7.13	0.74	4.39
Na2O	1.36	<0.01	3.84	3.09	1.49	2.35	4.40	3.54	2.66	3.37
K2O	3.81	0.04	0.99	1.52	2.07	1.49	0.32	0.43	5.36	0.35
P2O5	0.13	<0.01	0.10	0.19	0.14	0.50	0.10	0.09	0.03	0.11
LOI (%)	3.02	0.34	1.25	1.41	2.72	0.04	7.38	9.53	0.36	4.98
Total	99,02	100,96	99,89	100,75	99,99	99,6	99,98	100,17	100,03	98,61
Rb(ppm)	7.2	0.2	5.7	6.4	7.0	2.7	3.9	2.7	1.8	4.6
Sr	110.3	10.2	276.8	304.7	171.1	<1	213.6	204.7	173.5	156.5
Ba	728	18	188	302	394	0.52	133	123	638	117
Zr	162.4	7.8	168.9	156.3	153.4	5.3	92.5	75.1	78.9	103.9
Pb	52.9	3.5	47.1	29.4	28.3	0.5	106.1	79.3	1.3	79.3
Th	5.8	<0.2	5.2	5.3	5.4	0.4	1.3	0.6	6.6	0.8
Cs	2.7	<0.1	3.2	2.3	2.2	15.5	0.4	0.7	3.2	0.7
V	154	18	84	117	123	1.4	278	278	<8	363
W	8.9	5.8	0.7	5.7	9.2	91	3.1	11.7	2.8	9.5
As	128.8	1.7	77.9	28.6	21.3	39.2	111.8	185.4	1.1	601.4
Eu	0.91	0.13	1.18	1.56	1.31	4.51	1.07	0.94	0.42	1.10
Ta	0.5	<0.1	0.4	0.4	0.5	172.3	0.3	0.2	0.2	0.4
Au(ppb)	20.5	2.0	3.9	9.5	3.3	<0.1	11.2	8.7	<0.5	15.2