Potrerillos 40Ar/39Ar Laser Heating Data

Sample: EH-4 Co. Silica Biotite J=0.0031059

Exp.	Watts	40(mol)	40/39	37/39	36/39	K/Ca	39Ar	40Ar*	Age (Ma)
1	Fuse	1.0e-14	3.8053	0.1048	0.0187	4.7	0.005	0.409	21.2 +/- 1.8
2	0.1	8.8e-15	7.1078	0.0094	0.0565	52	0.007	0.298	39.4 +/- 7.7
3	Fuse	1.1e-13	7.2520	0.0017	0.0072	287	0.067	0.773	40.1 +/- 0.3
4	0.1	2.0e-14	5.1853	0.0037	0.1147	133	0.069	0.133	28.8 +/- 6.3
5	Fuse	1.7e-13	7.1757	0.0047	0.0112	103	0.153	0.685	39.7 +/- 0.3
6	Fuse	9.0e-14	7.2183	0.0041	0.0097	121	0.198	0.715	40.0 +/- 0.5
7	0.1	1.8e-14	5.4530	0.0009	0.0720	543	0.202	0.204	30.3 +/- 4.4
8	Fuse	1.2e-13	7.5240	0.0014	0.0123	350	0.255	0.674	41.6 +/- 0.4
9	0.1	3.0e-14	6.8631	0.0136	0.0590	36	0.262	0.282	38.0 +/- 2.5
10	Fuse	2.8e-13	7.2295	0.0019	0.0091	252	0.404	0.728	40.1 +/- 0.2
11	0.1	3.1e-14	6.2893	0.0042	0.0498	115	0.412	0.299	34.9 +/- 2.2
12	Fuse	2.0e-13	7.4755	0.0034	0.0117	144	0.505	0.684	41.4 +/- 0.3
13	0.1	3.2e-14	6.9676	0.0024	0.0240	201	0.517	0.496	38.6 +/- 1.4
14	0.25	8.2e-14	7.1262	0.0036	0.0048	137	0.565	0.833	39.5 +/- 0.4
15	Fuse	6.1e-14	7.1636	0.0036	0.0057	137	0.600	0.810	39.7 +/- 0.5
16	0.1	3.9e-15	3.8312	0.0521	0.1030	9.4	0.601	0.112	21.3 +/- 23.2
17	Fuse	2.7e-13	7.4051	0.0018	0.0121	271	0.727	0.675	41.0 +/- 0.2
18	0.1	4.6e-14	6.4878	0.0072	0.0501	68	0.738	0.305	36.0 +/- 1.8
19	Fuse	2.9e-13	7.2963	0.0027	0.0077	181	0.891	0.762	40.4 +/- 0.2
20	0.1	1.1e-13	7.0957	0.0025	0.0127	196	0.941	0.653	39.3 +/- 0.5
21	0.25	7.2e-14	7.2980	0.0032	0.0051	153	0.982	0.828	40.4 +/- 0.4
22	Fuse	2.9e-14	7.4383	0.0017	0.0029	282	1.000	0.897	41.2 +/- 0.8

Sample: EH-14 Co. Silica North Alunite J=0.0031160

Exp.	Watts	40(mol)	40/39	37/39	36/39	K/Ca	39Ar	40Ar*	Age (Ma)
1	0.10	5.4e-15	5.4602	0.0326	0.0293	15	0.003	0.387	30.4 +/- 7.3
2	0.25	2.6e-14	6.5088	0.0117	0.0109	42	0.028	0.669	36.2 +/- 1.1
3	0.40	5.7e-14	6.3787	0.0076	0.0030	65	0.099	0.880	35.5 +/- 0.4
4	Fuse	3.0e-14	6.3256	0.0081	0.0035	61	0.135	0.858	35.2 +/- 0.7
5	Fuse	8.5e-14	6.5180	0.0089	0.0044	55	0.234	0.835	36.3 +/- 0.3
6	Fuse	1.6e-13	6.3823	0.0076	0.0087	64	0.399	0.713	35.5 +/- 0.3
7	Fuse	6.3e-14	6.5194	0.0384	0.0028	13	0.477	0.887	36.3 +/- 0.4
8	Fuse	1.5e-13	6.2491	0.0346	0.0072	14	0.642	0.746	34.8 +/- 0.2
9	Fuse	1.4e-13	6.0943	0.0321	0.0230	15	0.738	0.473	33.9 +/- 0.5
10	Fuse	6.0e-14	6.4647	0.0195	0.0022	25	0.814	0.909	36.0 +/- 0.4
11	Fuse	8.6e-14	6.4458	0.0242	0.0039	20	0.916	0.847	35.9 +/- 0.3
12	Fuse	1.0e-13	6.2391	0.0188	0.0165	26	1.000	0.562	34.7 +/- 0.5

Sample: EH-33 Co. El Hueso Biotite J=0.0030294

Exp.	Watts	40(mol)	40/39	37/39	36/39	K/Ca	39Ar	40Ar*	Age (Ma)
1	Fuse	1.8e-13	6.0738	0.0036	0.0022	135	0.071	0.902	32.9 +/- 0.2
2	Fuse	1.7e-13	6.0650	0.0036	0.0014	137	0.141	0.937	32.8 +/- 0.1
3	Fuse	2.3e-13	6.1020	0.0035	0.0013	139	0.237	0.939	33.0 +/- 0.1
4	Fuse	2.2e-13	6.0881	0.0045	0.0022	108	0.327	0.905	33.0 +/- 0.1
5	Fuse	2.6e-13	6.0077	0.0080	0.0017	61	0.438	0.924	32.5 +/- 0.1
6	Fuse	8.3e-14	5.5134	0.0196	0.0072	25	0.468	0.721	29.9 +/- 0.3
7	Fuse	1.4e-13	6.0316	0.0056	0.0023	88	0.524	0.899	32.7 +/- 0.2
8	Fuse	2.3e-13	6.0277	0.0078	0.0018	63	0.619	0.918	32.6 +/- 0.1
9	Fuse	2.3e-13	5.8525	0.0156	0.0041	31	0.707	0.827	31.7 +/- 0.1
10	Fuse	1.3e-13	6.0328	0.0118	0.0025	42	0.761	0.889	32.7 +/- 0.2
11	Fuse	2.2e-13	6.0183	0.0286	0.0016	17	0.853	0.929	32.6 +/- 0.1
12	Fuse	1.0e-13	5.9615	0.0129	0.0028	38	0.894	0.877	32.3 +/- 0.2
13	Fuse	2.7e-13	5.9670	0.0146	0.0039	34	1.000	0.840	32.3 +/- 0.1

Sample: EH-17 Cobre Biotite J=0.0031143

Exp.	Watts	40(mol)	40/39	37/39	36/39	K/Ca	39Ar	40Ar*	Age (Ma)
1	Fuse	5.6e-14	6.3860	0.0000	0.0073	<0.001	0.045	0.747	35.5 +/- 0.2
2	Fuse	1.4e-13	6.3839	0.0095	0.0026	52	0.181	0.892	35.5 +/- 0.1
3	Fuse	1.4e-13	6.3904	0.0420	0.0049	12	0.306	0.815	35.5 +/- 0.1
4	Fuse	1.2e-13	6.4207	0.0237	0.0027	21	0.419	0.891	35.7 +/- 0.1
5	Fuse	3.0e-13	6.4289	0.0183	0.0025	27	0.705	0.898	35.8 +/- 0.0
6	Fuse	2.9e-13	6.3949	0.0175	0.0016	28	1.000	0.932	35.6 +/- 0.0

Sample: EH-18 Cobre Shreddy Biotite J=0.0030493

Exp.	Watts	40(mol)	40/39	37/39	36/39	K/Ca	39Ar	40Ar*	Age (Ma)
1	Fuse	7.2e-14	6.5438	0.0092	0.0017	53	0.195	0.930	35.6 +/- 0.1
2	Fuse	6.6e-14	6.5745	0.0166	0.0015	30	0.375	0.939	35.8 +/- 0.1
3	Fuse	1.1e-13	6.5431	0.0095	0.0019	51	0.663	0.923	35.6 +/- 0.1
4	Fuse	1.2e-13	6.5471	0.0133	0.0010	37	1.000	0.959	35.7 +/- 0.1

Sample: EH-21 Cobre Biotite J=0.0030670

Exp.	Watts	40(mol)	40/39	37/39	36/39	K/Ca	39Ar	40Ar*	Age (Ma)
1	Fuse	2.2e-14	6.4210	0.0115	0.0020	43	0.038	0.916	35.2 +/- 0.2
2	Fuse	9.7e-14	6.5097	0.0122	0.0018	40	0.205	0.925	35.7 +/- 0.1
3	Fuse	8.7e-14	6.4879	0.0141	0.0016	35	0.357	0.932	35.5 +/- 0.1
4	Fuse	8.0e-14	6.5664	0.0094	0.0017	52	0.494	0.930	36.0 +/- 0.1
5	Fuse	1.0e-13	6.5061	0.0073	0.0012	67	0.671	0.948	35.6 +/- 0.1
6	Fuse	7.9e-14	6.5510	0.0111	0.0022	44	0.804	0.908	35.9 +/- 0.1
7	Fuse	1.1e-13	6.5085	0.0066	0.0013	74	1.000	0.943	35.7 +/- 0.1

Sample: EH-21 Cobre Shreddy Biotite J=0.0029819

Exp.	Watts	40(mol)	40/39	37/39	36/39	K/Ca	39Ar	40Ar*	Age (Ma)
1	0.10	8.1e-15	6.8619	0.0313	0.0022	16	0.006	0.912	36.5 +/- 2.9
2	Fuse	2.4e-14	6.5252	0.0333	0.0017	15	0.025	0.930	34.8 +/- 0.9
3	Fuse	5.2e-14	6.3332	0.0322	0.0027	15	0.066	0.890	33.8 +/- 0.4
4	Fuse	6.8e-14	6.7265	0.0144	0.0012	34	0.120	0.952	35.8 +/- 0.3
5	Fuse	6.8e-14	6.6655	0.0072	0.0013	68	0.174	0.946	35.5 +/- 0.3
6	Fuse	9.0e-14	6.7168	0.0034	0.0010	143	0.246	0.956	35.8 +/- 0.3
7	Fuse	3.7e-14	6.5125	0.0071	0.0019	69	0.276	0.920	34.7 +/- 0.6
8	Fuse	1.1e-13	6.6870	0.0065	0.0016	76	0.362	0.934	35.6 +/- 0.2
9	Fuse	6.3e-14	6.7896	0.0093	0.0011	52	0.412	0.955	36.2 +/- 0.4
10	Fuse	1.8e-13	6.6587	0.0092	0.0013	53	0.555	0.945	35.5 +/- 0.1
11	Fuse	1.6e-13	6.6732	0.0127	0.0017	39	0.683	0.930	35.5 +/- 0.2
12	Fuse	1.3e-13	6.6541	0.0089	0.0014	55	0.783	0.943	35.4 +/- 0.2
13	Fuse	1.2e-13	6.5935	0.0052	0.0016	94	0.881	0.933	35.1 +/- 0.2
14	Fuse	1.5e-13	6.6185	0.0120	0.0016	41	1.000	0.935	35.3 +/- 0.2

Sample: EH-27 Cobre Vein Biotite J=0.0030213

Exp.	Watts	40(mol)	40/39	37/39	36/39	K/Ca	39Ar	40Ar*	Age (Ma)
1	Fuse	1.9e-13	6.5586	0.0048	0.0013	102	0.210	0.944	35.4 +/- 0.2
2	Fuse	1.6e-13	6.6306	0.0061	0.0011	80	0.383	0.954	35.8 +/- 0.2
3	Fuse	1.6e-13	6.6209	0.0039	0.0010	127	0.557	0.956	35.7 +/- 0.2
4	Fuse	1.4e-13	6.6027	0.0024	0.0008	201	0.709	0.967	35.6 +/- 0.2
5	Fuse	1.2e-13	6.6527	0.0028	0.0008	172	0.837	0.964	35.9 +/- 0.2
6	Fuse	1.5e-13	6.6129	0.0038	0.0013	129	1.000	0.946	35.7 +/- 0.2

Sample: EH-41 Norte Biotite J=0.0030698

Exp.	Watts	40(mol)	40/39	37/39	36/39	K/Ca	39Ar	40Ar*	Age (Ma)
1	Fuse	9.4e-14	6.6833	0.0075	0.0009	65	0.347	0.964	36.6 +/- 0.1
2	Fuse	1.1e-13	6.6752	0.0104	0.0009	47	0.747	0.962	36.6 +/- 0.1
3	Fuse	7.0e-14	6.6725	0.0081	0.0014	61	1.000	0.942	36.6 +/- 0.1