Table T3. U/Pb analytical results.

Table T3. U/Pb analytical results.

Label

U
(ppm)

Th
(ppm)

Th/U

²⁰⁴Pb/²⁰⁶Pb

²⁰⁷Pb/²⁰⁶Pb

²³⁸U/²⁰⁶Pb

Age*
(Ma)

Site 1110 rhyolite

1.1 214 3 0.02 0.0332 ± 0.0046 0.377 ± 0.023 230.7 ± 6.0 16.2 ± 0.9

2.1 335 22 0.07 0.0039 ± 0.0066 0.087 ± 0.010 392.5 ± 9.8 15.6 ± 0.4

4.1 74 1 0.02 0.0218 ± 0.0202 0.410 ± 0.042 254.8 ± 12.6 13.6 ± 1.5

5.1 180 9 0.05 0.0107 ± 0.0122 0.204 ± 0.020 345.0 ± 15.0 14.9 ± 0.8

7.1 155 48 0.31 0.0087 ± 0.0192 0.171 ± 0.022 327.7 ± 14.3 16.5 ± 0.9

8.1 398 18 0.05 0.0000 ± 0.0038 0.128 ± 0.015 374.6 ± 10.1 15.4 ± 0.5

8.2 75 26 0.35 0.0031 ± 0.0041 0.107 ± 0.005 62.0 ± 1.8 95.5 ± 2.8^†

Site 1111 rhyolite

1.1 464 29 0.06 0.0077 ± 0.0051 0.105 ± 0.009 376.9 ± 8.3 15.8 ± 0.4

2.1 406 26 0.07 0.0021 ± 0.0036 0.120 ± 0.011 377.7 ± 9.0 15.4 ± 0.4

3.1 123 7 0.06 0.0062 ± 0.0111 0.168 ± 0.032 329.8 ± 23.1 16.5 ± 1.4

4.1 465 130 0.28 0.0045 ± 0.0047 0.105 ± 0.005 374.7 ± 7.8 15.9 ± 0.3

5.1 376 24 0.06 0.0027 ± 0.0051 0.117 ± 0.013 366.1 ± 14.5 16.0 ± 0.7

6.1 181 11 0.07 0.0050 ± 0.0078 0.189 ± 0.015 331.2 ± 18.4 15.9 ± 1.0

7.1 223 18 0.08 0.0039 ± 0.0070 0.188 ± 0.030 336.0 ± 10.7 15.7 ± 0.9

8.1 151 2 0.01 0.0051 ± 0.0097 0.259 ± 0.033 304.7 ± 10.3 15.4 ± 1.0

9.1 235 5 0.02 0.0071 ± 0.0068 0.167 ± 0.016 357.9 ± 13.8 15.2 ± 0.7

Site 1108 microgranite

1.1 116 78 0.67 0.0013 ± 0.0009 0.075 ± 0.002 11.0 ± 0.2 550 ± 12

2.1 1448 664 0.46 0.0071 ± 0.0069 0.072 ± 0.013 1999.4 ± 54.3 3.1 ± 0.1

Site 1117A-11R gabbro

3.1 2028 8328 4.11 0.0011 ± 0.0005 0.068 ± 0.003 94.9 ± 1.4 65.8 ± 1.0

5.1 7609 29605 3.89 0.0011 ± 0.0004 0.058 ± 0.002 83.6 ± 2.0 75.6 ± 1.8^†

6.1 2716 18890 6.95 0.0006 ± 0.0006 0.060 ± 0.004 110.7 ± 8.9 57.0 ± 4.6^†

8.1 656 2099 3.20 0.0029 ± 0.0011 0.055 ± 0.006 95.1 ± 2.5 66.8 ± 1.8

10.1 1509 2912 1.93 0.0004 ± 0.0004 0.052 ± 0.002 98.2 ± 1.6 64.9 ± 1.1

13.1 1981 7874 3.97 0.0010 ± 0.0006 0.058 ± 0.003 92.9 ± 1.8 68.1 ± 1.3

15.1 3159 9440 2.99 0.0001 ± 0.0001 0.046 ± 0.002 92.3 ± 2.8 69.6 ± 2.1

Label	U (ppm)	Th (ppm)	Th/U	²⁰⁴Pb/²⁰⁶Pb	²⁰⁷Pb/²⁰⁶Pb	²³⁸U/²⁰⁶Pb	Age* (Ma)
Site 1110 rhyolite
1.1	214	3	0.02	0.0332 ± 0.0046	0.377 ± 0.023	230.7 ± 6.0	16.2 ± 0.9
2.1	335	22	0.07	0.0039 ± 0.0066	0.087 ± 0.010	392.5 ± 9.8	15.6 ± 0.4
4.1	74	1	0.02	0.0218 ± 0.0202	0.410 ± 0.042	254.8 ± 12.6	13.6 ± 1.5
5.1	180	9	0.05	0.0107 ± 0.0122	0.204 ± 0.020	345.0 ± 15.0	14.9 ± 0.8
7.1	155	48	0.31	0.0087 ± 0.0192	0.171 ± 0.022	327.7 ± 14.3	16.5 ± 0.9
8.1	398	18	0.05	0.0000 ± 0.0038	0.128 ± 0.015	374.6 ± 10.1	15.4 ± 0.5
8.2	75	26	0.35	0.0031 ± 0.0041	0.107 ± 0.005	62.0 ± 1.8	95.5 ± 2.8^†
Site 1111 rhyolite
1.1	464	29	0.06	0.0077 ± 0.0051	0.105 ± 0.009	376.9 ± 8.3	15.8 ± 0.4
2.1	406	26	0.07	0.0021 ± 0.0036	0.120 ± 0.011	377.7 ± 9.0	15.4 ± 0.4
3.1	123	7	0.06	0.0062 ± 0.0111	0.168 ± 0.032	329.8 ± 23.1	16.5 ± 1.4
4.1	465	130	0.28	0.0045 ± 0.0047	0.105 ± 0.005	374.7 ± 7.8	15.9 ± 0.3
5.1	376	24	0.06	0.0027 ± 0.0051	0.117 ± 0.013	366.1 ± 14.5	16.0 ± 0.7
6.1	181	11	0.07	0.0050 ± 0.0078	0.189 ± 0.015	331.2 ± 18.4	15.9 ± 1.0
7.1	223	18	0.08	0.0039 ± 0.0070	0.188 ± 0.030	336.0 ± 10.7	15.7 ± 0.9
8.1	151	2	0.01	0.0051 ± 0.0097	0.259 ± 0.033	304.7 ± 10.3	15.4 ± 1.0
9.1	235	5	0.02	0.0071 ± 0.0068	0.167 ± 0.016	357.9 ± 13.8	15.2 ± 0.7
Site 1108 microgranite
1.1	116	78	0.67	0.0013 ± 0.0009	0.075 ± 0.002	11.0 ± 0.2	550 ± 12
2.1	1448	664	0.46	0.0071 ± 0.0069	0.072 ± 0.013	1999.4 ± 54.3	3.1 ± 0.1
Site 1117A-11R gabbro
3.1	2028	8328	4.11	0.0011 ± 0.0005	0.068 ± 0.003	94.9 ± 1.4	65.8 ± 1.0
5.1	7609	29605	3.89	0.0011 ± 0.0004	0.058 ± 0.002	83.6 ± 2.0	75.6 ± 1.8^†
6.1	2716	18890	6.95	0.0006 ± 0.0006	0.060 ± 0.004	110.7 ± 8.9	57.0 ± 4.6^†
8.1	656	2099	3.20	0.0029 ± 0.0011	0.055 ± 0.006	95.1 ± 2.5	66.8 ± 1.8
10.1	1509	2912	1.93	0.0004 ± 0.0004	0.052 ± 0.002	98.2 ± 1.6	64.9 ± 1.1
13.1	1981	7874	3.97	0.0010 ± 0.0006	0.058 ± 0.003	92.9 ± 1.8	68.1 ± 1.3
15.1	3159	9440	2.99	0.0001 ± 0.0001	0.046 ± 0.002	92.3 ± 2.8	69.6 ± 2.1

Notes: Error = 1 . * = age is the ²⁰⁶Pb/²³⁸U age corrected for common Pb from the measured ²⁰⁷Pb/²⁰⁶Pb. † = outlier excluded from age calculation.