Spot	 
%
206Pbc	ppm
U	ppm
Th	232Th
/238U	%
Dis-
cor-
dant	4corr
207r
/206r	err	4corr
207r
/235	err	4corr
206r
/238	err	err
corr	(1)
206Pb
/238U
Age	(1)
207Pb
/206Pb
Age	
IS3-37	0.90	574	32	0.06	-54 	.0537	.0028	0.66	0.05	.0891	.0051	.736	550	30	357	119	
IS3-47	1.37	87	41	0.49	-35 	.0703	.0044	2.10	0.18	.2162	.0127	.688	1262	68	938	127	
IS3-42	5.82	39	18	0.49	-7 	.0722	.0170	1.78	0.43	.1784	.0113	.260	1058	62	993	479	
IS3-13	1.71	124	83	0.69	-13 	.0729	.0062	1.95	0.20	.1936	.0115	.569	1141	62	1012	173	
IS3-43	0.37	228	108	0.49	-4 	.0733	.0022	1.82	0.12	.1799	.0104	.891	1067	57	1023	59	
IS3-6	0.91	194	13	0.07	-1 	.0741	.0034	1.81	0.13	.1774	.0103	.787	1053	57	1044	92	
IS3-24	0.92	207	75	0.37	-7 	.0752	.0034	2.02	0.15	.1953	.0114	.793	1150	61	1073	90	
IS3-57	0.20	355	117	0.34	-8 	.0753	.0012	2.05	0.12	.1976	.0113	.964	1163	61	1077	32	
IS3-33	1.92	58	27	0.48	-17 	.0757	.0078	2.28	0.27	.2182	.0132	.507	1272	70	1087	206	
IS3-10	0.74	207	137	0.68	-7 	.0760	.0028	2.09	0.14	.1995	.0116	.841	1173	62	1096	75	
IS3-27	1.48	133	74	0.57	-21 	.0766	.0058	2.44	0.24	.2308	.0139	.620	1338	73	1110	152	
IS3-64	0.42	282	48	0.17	-11 	.0771	.0018	2.27	0.14	.2139	.0123	.926	1250	65	1124	47	
IS3-36	1.83	142	68	0.49	16 	.0777	.0077	1.72	0.20	.1606	.0096	.516	960	53	1139	196	
IS3-23	3.22	39	43	1.14	2 	.0782	.0149	2.06	0.41	.1910	.0121	.316	1127	66	1151	377	
IS3-60	0.21	636	149	0.24	-7 	.0788	.0009	2.32	0.14	.2139	.0122	.982	1250	65	1166	22	
IS3-02	2.22	143	32	0.23	-2 	.0828	.0065	2.54	0.25	.2224	.0131	.601	1294	69	1265	153	
IS3-30	0.50	407	220	0.56	-1 	.0851	.0017	2.69	0.16	.2296	.0132	.942	1332	69	1318	40	
IS3-58	1.12	120	104	0.89	-14 	.0853	.0037	3.11	0.23	.2642	.0154	.804	1511	79	1322	84	
IS3-12	0.72	253	124	0.51	-7 	.0869	.0038	3.02	0.22	.2519	.0146	.798	1448	75	1358	84	
IS3-61	0.33	130	65	0.52	-1 	.0891	.0021	3.03	0.19	.2471	.0144	.928	1423	74	1406	45	
IS3-38	1.00	114	37	0.33	2 	.0892	.0044	2.93	0.22	.2384	.0140	.768	1379	73	1409	93	
IS3-34	1.47	45	47	1.06	3 	.0899	.0114	2.97	0.42	.2394	.0149	.441	1383	77	1424	242	
IS3-22	1.87	98	37	0.39	2 	.0903	.0071	3.02	0.30	.2423	.0145	.603	1399	75	1432	151	
																	
 Spot	 
%
206Pbc	ppm
U	ppm
Th	232Th
/238U	%
Dis-
cor-
dant	4corr
207r
/206r	err	4corr
207r
/235	err	4corr
206r
/238	err	err
corr	(1)
206Pb
/238U
Age	(1)
207Pb
/206Pb
Age	
IS3-45	1.34	44	32	0.74	2 	.0915	.0033	3.11	0.22	.2466	.0150	.861	1421	78	1457	68	
IS3-46	0.29	263	133	0.52	-9 	.0918	.0014	3.56	0.21	.2811	.0163	.967	1597	82	1464	29	
IS3-12	0.61	106	44	0.43	-5 	.0927	.0026	3.50	0.23	.2743	.0161	.903	1562	81	1481	53	
IS3-39	0.36	188	148	0.81	-9 	.0929	.0015	3.64	0.22	.2847	.0164	.963	1615	82	1485	30	
IS3-59	0.42	106	94	0.92	-5 	.1027	.0023	4.43	0.28	.3125	.0183	.935	1753	90	1673	41	
IS3-01	0.59	162	183	1.17	2 	.1029	.0032	4.12	0.27	.2907	.0169	.881	1645	85	1677	58	
IS3-63	0.08	646	52	0.08	-4 	.1036	.0014	4.47	0.26	.3128	.0179	.974	1754	88	1689	24	
IS3-17	0.48	129	163	1.31	-3 	.1036	.0025	4.43	0.28	.3101	.0181	.926	1741	89	1689	44	
IS3-26	0.57	92	55	0.63	-3 	.1039	.0030	4.46	0.29	.3115	.0183	.899	1748	90	1695	53	
IS4-3	1.18	206	69	0.35	3 	.1042	.0035	4.18	0.28	.2908	.0169	.866	1645	84	1701	62	
IS3-56	0.58	182	144	0.82	-6 	.1056	.0020	4.76	0.29	.3271	.0189	.952	1824	92	1725	34	
IS3-28	0.10	313	497	1.64	-9 	.1058	.0011	4.95	0.29	.3394	.0196	.985	1884	94	1729	18	
IS3-51	0.51	129	54	0.44	-13 	.1061	.0021	5.21	0.32	.3558	.0207	.946	1962	98	1734	37	
IS3-14	1.16	51	29	0.58	7 	.1078	.0060	4.31	0.36	.2900	.0178	.740	1641	89	1763	102	
IS3-49	0.23	215	84	0.40	-4 	.1099	.0014	5.11	0.30	.3371	.0194	.975	1873	94	1797	24	
IS3-50	0.11	381	117	0.32	-3 	.1106	.0010	5.08	0.29	.3335	.0191	.989	1855	92	1809	16	
IS3-62	0.29	102	55	0.55	-8 	.1110	.0015	5.44	0.33	.3554	.0207	.975	1960	99	1816	24	
IS3-08	0.42	160	67	0.43	-3 	.1114	.0022	5.21	0.32	.3390	.0197	.947	1882	95	1822	36	
IS3-48	0.47	110	36	0.34	-2 	.1119	.0028	5.20	0.33	.3371	.0197	.917	1873	95	1830	46	
IS3-18	0.28	625	199	0.33	-3 	.1121	.0009	5.29	0.31	.3423	.0196	.990	1898	94	1834	15	
IS3-09	0.31	231	110	0.49	1 	.1122	.0019	5.05	0.30	.3263	.0188	.960	1820	92	1835	30	
IS3-25	0.73	323	52	0.17	3 	.1133	.0028	5.01	0.31	.3209	.0185	.921	1794	90	1853	44	
IS3-05	0.54	240	136	0.59	3 	.1147	.0023	5.19	0.32	.3278	.0189	.945	1828	92	1876	36	
																	
 Spot	 
%
206Pbc	ppm
U	ppm
Th	232Th
/238U	%
Dis-
cor-
dant	4corr
207r
/206r	err	4corr
207r
/235	err	4corr
206r
/238	err	err
corr	(1)
206Pb
/238U
Age	(1)
207Pb
/206Pb
Age	
IS3-32	0.28	272	120	0.46	-1 	.1149	.0014	5.41	0.32	.3418	.0197	.978	1895	94	1878	22	
IS3-07	0.59	252	232	0.95	2 	.1168	.0021	5.42	0.33	.3367	.0194	.956	1871	94	1907	32	
IS3-16	1.46	46	58	1.32	-1 	.1182	.0055	5.75	0.44	.3528	.0214	.796	1948	102	1929	83	
IS3-21	1.78	40	36	0.94	6 	.1195	.0067	5.43	0.45	.3297	.0203	.742	1837	99	1949	100	
IS3-53	0.30	98	38	0.40	-6 	.1262	.0023	6.99	0.43	.4018	.0238	.954	2177	109	2045	33	
IS3-04	2.11	85	79	0.96	3 	.1462	.0056	8.36	0.59	.4148	.0245	.838	2237	112	2302	66	
IS3-11	0.56	125	13	0.11	2 	.1509	.0023	9.01	0.55	.4331	.0253	.967	2320	114	2356	27	
IS3-39	0.12	242	74	0.32	9 	.1634	.0015	9.54	0.55	.4234	.0243	.988	2276	110	2491	15	
IS3-19	0.08	485	181	0.38	-6 	.1738	.0011	12.69	0.73	.5292	.0303	.994	2738	128	2595	10	
IS3-41	0.99	43	97	2.30	8 	.1748	.0072	10.86	0.80	.4504	.0276	.830	2397	123	2604	69	
IS3-40	1.81	23	16	0.73	-13 	.1800	.0069	14.68	1.09	.5914	.0376	.855	2995	152	2653	64	
IS3-52	0.11	212	127	0.62	-8 	.1840	.0012	14.44	0.84	.5692	.0327	.993	2905	135	2689	11	
IS3-54	0.18	175	14	0.08	-4 	.1848	.0015	13.83	0.80	.5427	.0313	.991	2795	131	2696	13	
IS3-29	0.76	69	65	0.97	5 	.1874	.0035	12.82	0.82	.4961	.0302	.955	2597	130	2720	31	
IS3-35	0.46	156	190	1.25	8 	.1887	.0028	12.40	0.75	.4766	.0279	.970	2512	122	2731	24	
IS3-55	0.73	35	20	0.57	-2 	.1894	.0039	14.11	0.91	.5401	.0331	.949	2784	138	2737	34	
IS3-15	0.32	220	287	1.35	-3 	.1925	.0014	14.82	0.86	.5584	.0322	.992	2860	133	2764	12	
IS3-44	0.63	87	27	0.33	-7 	.1931	.0024	15.57	0.93	.5848	.0343	.978	2968	139	2768	21	
IS3-31	0.48	57	25	0.45	-7 	.1975	.0027	16.05	0.98	.5897	.0352	.974	2988	143	2805	23	

Errors are 1-sigma; Pbc and Pb* indicate the common and radiogenic portions, respectively.
Error in Standard calibration was 1.5%
(1) Common Pb corrected using measured 204Pb.