Table A1-C -.

Assessment of the accuracy and precision of the bulk-rock trace element data generated during this study.

Reference materials
	AGV-2	GeoReM preferred value	Deviation from GeoReM value*	BHVO-2	GeoReM preferred value	Deviation from GeoReM value*	OKUM-1	OKUM-2	Ext. Precision (2-sigma)	IAG preliminary certified value	Deviation of OKUM averag from IAG valu
Ba (ppm)	1134.4	1130	0.4%	132.2	131	1%	6.2	6.1	2%	6.38	−4%
Be	2.03	2.3	−12%	1.09	1	9%	0.11	0.09	28%	0.066	52%
Bi	0.08	0.04 to 0.07	14% to 100%	0.03	0.01–0.03	0% to 200%	0.01	0.13	242%	n.d.	−
Cd	0.102	0.063 to 0.25	−59% to 62%	0.118	0.06	97%	0.062	0.057	12%	n.d.	−
Ce	69.44	68.6	1%	37	37.5	−1%	1.28	1.17	13%	1.271	−4%
Co	15.87	16	−1%	46.54	45	3%	90.93	90.63	0%	89	2%
Cr	17	16	6%	302	280	8%	2524	2499	1%	2461	2%
Cs	1.13	1.2	−6%	0.096	0.1	−4%	0.183	0.181	2%	0.184	−1%
Cu	52.3	53	−1%	134.3	127	6%	49.1	46	9%	43	11%
Dy	3.56	3.47	3%	5.532	5.31	4%	1.549	1.571	2%	1.609	−3%
Er	1.863	1.81	3%	2.586	2.54	2%	1.018	1.046	4%	1.042	−1%
Eu	1.5038	1.53	−2%	2.0826	2.07	1%	0.2868	0.2961	5%	0.303	−4%
Ga	19.7	20	−2%	21.12	22	−4%	8.75	8.62	2%	8.81	−1%
Gd	4.595	4.52	2%	6.514	6.24	4%	1.237	1.204	4%	1.141	7%
Hf	5.13	5	3%	4.44	4.36	2%	0.57	0.6	7%	0.548	7%
Ho	0.6674	0.65	3%	0.9755	0.98	0%	0.3369	0.3361	0%	0.355	−5%
In	0.0452	0.0452 to 0.05	−10% to 0%	0.0858	0.082–0.19	−55% to 5%	0.034	0.0355	6%	n.d.	−
La	38.29	37.9	1%	15.42	15.2	1%	0.46	0.42	13%	0.415	6%
Li	9.1	11	−17%	4.5	4.8	−6%	4.2	4.3	3%	4.38	−3%
Lu	0.2487	0.247	1%	0.2735	0.274	0%	0.1472	0.146	1%	0.149	−2%
Mo	2.24	1.83–2.26	−1% to 22%	4.29	4	7%	0.37	0.27	44%	n.d.	−
Nb	13.279	14.5	−8%	17.398	18.1	−4%	0.332	0.342	4%	0.346	−3%
Nd	31.08	30.5	2%	24.74	24.5	1%	1.52	1.41	11%	1.49	−2%
Ni	19.2	20	−4%	122.6	119	3%	896.7	902.1	1%	884	2%
Pb	12.9	13.2	−2%	1.5	1.6	−6%	0.3	0.2	57%	0.265	−6%
Pr	8.186	7.84	4%	5.365	5.35	0%	0.258	0.25	4%	0.239	6%
Rb	64.2	66.3	−3%	9.07	9.11	0%	0.88	0.9	3%	0.96	−7%
Sb	0.45	0.385–0.6	−25% to 17%	0.11	0.13	−15%	0.08	0.09	17%	0.077	10%
Sc	12.8	13	−2%	32.9	32	3%	29.2	29	1%	28	4%
Sm	5.656	5.49	3%	6.169	6.07	2%	0.7	0.705	1%	0.712	−1%
Sn	1.8	2.3	−22%	2.61	1.7	54%	0.17	0.23	42%	0.25	−20%
Sr	640.4	661	−3%	388.1	369	5%	15.7	15.6	1%	16.1	−3%
Ta	0.821	0.87	−6%	1.115	1.14	−2%	0.02	0.019	7%	0.026	−25%
Tb	0.6078	0.64	−5%	0.9318	0.92	1%	0.22	0.2222	1%	0.225	−2%
Th	6.277	6.1	3%	1.175	1.22	−4%	0.028	0.029	5%	0.031	−8%
Ti	5912	6295	−6%	16238	16300	0%	2124	2133	1%	2284	−7%
Tl	0.265	0.27	−2%	0.019	0.011–0.08	−76% to 73%	0.014	0.015	10%	0.015	−3%
Tm	0.2537	0.26	−2%	0.3364	0.33	2%	0.145	0.148	3%	0.154	−5%
U	1.895	1.86	2%	0.42	0.403	4%	0.012	0.013	11%	0.014	−11%
V	118.4	122	−3%	319.9	317	1%	173.3	170.2	3%	167	3%
W	0.51	0.439–0.56	−9% to 16%	0.22	0.21	5%	0.09	0.06	57%	n.d.	−
Y	19.16	19	1%	25.83	26	−1%	9.17	9.33	2%	9.27	0%
Yb	1.635	1.62	1%	2.009	2	0%	0.973	0.989	2%	1.02	−4%
Zn	84	86	−2%	98	103	−5%	63	63	0%	61.2	3%
Zr	230	230	0%	170	172	−1%	18	19	8%	17.4	6%

Pipe samples
	GV1282	GV1282 - duplicate	Ext. Precision (2-sigma)	VM1317	VM1317 - duplicate	Ext. Precision (2-sigma)	BO1242	BO1242 - duplicate	Ext. Precision (2-sigma)	BO1260	BO1260 - duplicate	Ext. Precision (2-sigma)
Ba (ppm)	1.8	1.7	8%	17.1	17.2	1%	179.5	176.4	2%	10201.2	10256.3	1%
Be	0.02	0.03	57%	0.17	0.14	27%	0.92	0.88	6%	0.37	0.34	12%
Bi	0.91	0.88	5%	0.29	0.28	5%	0.59	0.35	72%	0.05	0.02	121%
Cd	0.083	0.077	11%	0.156	0.159	3%	0.425	0.442	6%	0.059	0.053	15%
Ce	0.14	0.13	10%	2.15	2.11	3%	13.93	13.61	3%	62.11	61.74	1%
Co	616.86	603.99	3%	276.34	276.8	0%	115.31	112.32	4%	10.8	11.02	3%
Cr	134	130	4%	2079	2136	4%	938	906	5%	5	5	0%
Cs	0.009	0.009	0%	0.054	0.052	5%	0.356	0.35	2%	0.198	0.194	3%
Cu	387.4	381.5	2%	2217.8	2188.7	2%	1075.9	1042.7	4%	5.8	5.5	8%
Dy	0.007	0.009	35%	0.785	0.796	2%	2.25	2.186	4%	3.079	3.104	1%
Er	0.006	0.006	0%	0.465	0.448	5%	1.356	1.295	7%	1.459	1.44	2%
Eu	0.0074	0.009	28%	0.2397	0.2427	2%	0.9273	0.9108	3%	7.3876	7.5676	3%
Ga	1.55	1.53	2%	5.92	6.09	4%	11.93	11.22	9%	19.81	19.77	0%
Gd	0.01	0.012	26%	0.75	0.746	1%	2.281	2.198	5%	4.904	4.969	2%
Hf	0.02	0.02	0%	0.42	0.4	7%	1.45	1.45	0%	3.54	3.56	1%
Ho	0.0022	0.0018	28%	0.154	0.1566	2%	0.446	0.4513	2%	0.5753	0.5627	3%
In	0.0047	0.0049	6%	0.0395	0.0391	1%	0.0762	0.076	0%	0.0168	0.0173	4%
La	0.07	0.07	0%	0.83	0.82	2%	5.92	5.85	2%	29.67	28.96	3%
Li	0.3	0.3	0%	3.3	3.4	4%	2.9	2.8	5%	3.7	3.8	4%
Lu	0.0009	0.0007	35%	0.0599	0.0597	0%	0.1863	0.1921	4%	0.1446	0.1456	1%
Mo	0.2	0.21	7%	0.14	0.13	10%	0.6	0.61	2%	0.17	0.16	9%
Nb	0.035	0.04	19%	0.223	0.234	7%	3.116	3.017	5%	3.566	3.92	13%
Nd	0.07	0.07	0%	1.9	1.98	6%	9.12	8.94	3%	38.06	37.69	1%
Ni	50340	49562	2%	4142.9	4138.2	0%	2139.7	2079.5	4%	2.7	2.6	5%
Pb	2.8	2.8	0%	3.9	3.9	0%	5	4.7	9%	6.5	6.5	0%
Pr	0.016	0.014	19%	0.354	0.357	1%	2.016	1.932	6%	8.431	8.343	1%
Rb	0.07	0.07	0%	0.42	0.44	7%	6.5	6.16	8%	27.5	27.68	1%
Sb	0.02	0.02	0%	0.02	0.02	0%	0.06	0.07	22%	0.02	0.01	94%
Sc	0.3	0.4	40%	17.2	17.1	1%	25.5	24.3	7%	7.9	8	2%
Sm	0.02	0.014	50%	0.655	0.614	9%	2.135	2.111	2%	6.251	6.2	1%
Sn	0.02	0.02	0%	0.03	0.13	177%	0.97	0.93	6%	0.09	0.09	0%
Sr	0.7	0.7	0%	107.3	107.4	0%	198	193.2	3%	630.4	638.4	2%
Ta	bdl.	bdl.	−	0.016	0.016	0%	0.194	0.186	6%	0.112	0.123	13%
Tb	0.0017	0.002	23%	0.1213	0.1207	1%	0.35	0.3506	0%	0.5725	0.5685	1%
Th	0.009	0.01	15%	0.059	0.062	7%	0.614	0.596	4%	0.471	0.476	1%
Ti	174	167	6%	2121	2113	1%	4170	3997	6%	8971	8960	0%
Tl	0.058	0.055	8%	0.029	0.031	9%	0.053	0.051	5%	0.097	0.097	0%
Tm	0.001	0.001	0%	0.061	0.0638	6%	0.1954	0.1922	2%	0.1725	0.1742	1%
U	0.005	0.005	0%	0.019	0.018	8%	0.201	0.186	11%	0.324	0.334	4%
V	26	24.4	9%	180.6	182	1%	174.1	166.1	7%	120.6	121.4	1%
W	0.03	0.02	57%	0.87	0.88	2%	0.22	0.21	7%	0.02	0.02	0%
Y	0.04	0.04	0%	4.05	4.02	1%	12.38	11.94	5%	15.26	15.21	0%
Yb	0.006	0.005	26%	0.411	0.396	5%	1.286	1.224	7%	1.001	1.007	1%
Zn	7	8	19%	109	112	4%	169	161	7%	66	65	2%
Zr	1	1	0%	14	13	10%	65	64	2%	228	229	1%